| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.shared.ldap.util; |
| |
| |
| import java.io.File; |
| |
| import org.apache.directory.shared.i18n.I18n; |
| |
| |
| /** |
| * <p> |
| * Helpers for <code>java.lang.System</code>. |
| * </p> |
| * <p> |
| * If a system property cannot be read due to security restrictions, the |
| * corresponding field in this class will be set to <code>null</code> and a |
| * message will be written to <code>System.err</code>. |
| * </p> |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class SystemUtils |
| { |
| |
| /** |
| * The prefix String for all Windows OS. |
| */ |
| private static final String OS_NAME_WINDOWS_PREFIX = "Windows"; |
| |
| // System property constants |
| // ----------------------------------------------------------------------- |
| // These MUST be declared first. Other constants depend on this. |
| |
| /** |
| * The System property key for the user home directory. |
| */ |
| private static final String USER_HOME_KEY = "user.home"; |
| |
| /** |
| * The System property key for the user directory. |
| */ |
| private static final String USER_DIR_KEY = "user.dir"; |
| |
| /** |
| * The System property key for the Java IO temporary directory. |
| */ |
| private static final String JAVA_IO_TMPDIR_KEY = "java.io.tmpdir"; |
| |
| /** |
| * The System property key for the Java home directory. |
| */ |
| private static final String JAVA_HOME_KEY = "java.home"; |
| |
| /** |
| * <p> |
| * The <code>awt.toolkit</code> System Property. |
| * </p> |
| * <p> |
| * Holds a class name, on Windows XP this is |
| * <code>sun.awt.windows.WToolkit</code>. |
| * </p> |
| * <p> |
| * <b>On platforms without a GUI, this value is <code>null</code>.</b> |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public static final String AWT_TOOLKIT = getSystemProperty( "awt.toolkit" ); |
| |
| /** |
| * <p> |
| * The <code>file.encoding</code> System Property. |
| * </p> |
| * <p> |
| * File encoding, such as <code>Cp1252</code>. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.0 |
| * @since Java 1.2 |
| */ |
| public static final String FILE_ENCODING = getSystemProperty( "file.encoding" ); |
| |
| /** |
| * <p> |
| * The <code>file.separator</code> System Property. File separator (<code>"/"</code> |
| * on UNIX). |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String FILE_SEPARATOR = getSystemProperty( "file.separator" ); |
| |
| /** |
| * <p> |
| * The <code>java.awt.fonts</code> System Property. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public static final String JAVA_AWT_FONTS = getSystemProperty( "java.awt.fonts" ); |
| |
| /** |
| * <p> |
| * The <code>java.awt.graphicsenv</code> System Property. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public static final String JAVA_AWT_GRAPHICSENV = getSystemProperty( "java.awt.graphicsenv" ); |
| |
| /** |
| * <p> |
| * The <code>java.awt.headless</code> System Property. The value of this |
| * property is the String <code>"true"</code> or <code>"false"</code>. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @see #isJavaAwtHeadless() |
| * @since 2.1 |
| * @since Java 1.4 |
| */ |
| public static final String JAVA_AWT_HEADLESS = getSystemProperty( "java.awt.headless" ); |
| |
| /** |
| * <p> |
| * The <code>java.awt.printerjob</code> System Property. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public static final String JAVA_AWT_PRINTERJOB = getSystemProperty( "java.awt.printerjob" ); |
| |
| /** |
| * <p> |
| * The <code>java.class.path</code> System Property. Java class path. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String JAVA_CLASS_PATH = getSystemProperty( "java.class.path" ); |
| |
| /** |
| * <p> |
| * The <code>java.class.version</code> System Property. Java class format |
| * version number. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String JAVA_CLASS_VERSION = getSystemProperty( "java.class.version" ); |
| |
| /** |
| * <p> |
| * The <code>java.compiler</code> System Property. Name of JIT compiler to |
| * use. First in JDK version 1.2. Not used in Sun JDKs after 1.2. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2. Not used in Sun versions after 1.2. |
| */ |
| public static final String JAVA_COMPILER = getSystemProperty( "java.compiler" ); |
| |
| /** |
| * <p> |
| * The <code>java.endorsed.dirs</code> System Property. Path of endorsed |
| * directory or directories. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.4 |
| */ |
| public static final String JAVA_ENDORSED_DIRS = getSystemProperty( "java.endorsed.dirs" ); |
| |
| /** |
| * <p> |
| * The <code>java.ext.dirs</code> System Property. Path of extension |
| * directory or directories. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.3 |
| */ |
| public static final String JAVA_EXT_DIRS = getSystemProperty( "java.ext.dirs" ); |
| |
| /** |
| * <p> |
| * The <code>java.home</code> System Property. Java installation |
| * directory. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String JAVA_HOME = getSystemProperty( JAVA_HOME_KEY ); |
| |
| /** |
| * <p> |
| * The <code>java.io.tmpdir</code> System Property. Default temp file |
| * path. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_IO_TMPDIR = getSystemProperty( JAVA_IO_TMPDIR_KEY ); |
| |
| /** |
| * <p> |
| * The <code>java.library.path</code> System Property. List of paths to |
| * search when loading libraries. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_LIBRARY_PATH = getSystemProperty( "java.library.path" ); |
| |
| /** |
| * <p> |
| * The <code>java.runtime.name</code> System Property. Java Runtime |
| * Environment name. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.0 |
| * @since Java 1.3 |
| */ |
| public static final String JAVA_RUNTIME_NAME = getSystemProperty( "java.runtime.name" ); |
| |
| /** |
| * <p> |
| * The <code>java.runtime.version</code> System Property. Java Runtime |
| * Environment version. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.0 |
| * @since Java 1.3 |
| */ |
| public static final String JAVA_RUNTIME_VERSION = getSystemProperty( "java.runtime.version" ); |
| |
| /** |
| * <p> |
| * The <code>java.specification.name</code> System Property. Java Runtime |
| * Environment specification name. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_SPECIFICATION_NAME = getSystemProperty( "java.specification.name" ); |
| |
| /** |
| * <p> |
| * The <code>java.specification.vendor</code> System Property. Java |
| * Runtime Environment specification vendor. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_SPECIFICATION_VENDOR = getSystemProperty( "java.specification.vendor" ); |
| |
| /** |
| * <p> |
| * The <code>java.specification.version</code> System Property. Java |
| * Runtime Environment specification version. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.3 |
| */ |
| public static final String JAVA_SPECIFICATION_VERSION = getSystemProperty( "java.specification.version" ); |
| |
| /** |
| * <p> |
| * The <code>java.util.prefs.PreferencesFactory</code> System Property. A |
| * class name. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.1 |
| * @since Java 1.4 |
| */ |
| public static final String JAVA_UTIL_PREFS_PREFERENCES_FACTORY = getSystemProperty( "java.util.prefs.PreferencesFactory" ); |
| |
| /** |
| * <p> |
| * The <code>java.vendor</code> System Property. Java vendor-specific |
| * string. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String JAVA_VENDOR = getSystemProperty( "java.vendor" ); |
| |
| /** |
| * <p> |
| * The <code>java.vendor.url</code> System Property. Java vendor URL. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String JAVA_VENDOR_URL = getSystemProperty( "java.vendor.url" ); |
| |
| /** |
| * <p> |
| * The <code>java.version</code> System Property. Java version number. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String JAVA_VERSION = getSystemProperty( "java.version" ); |
| |
| /** |
| * <p> |
| * The <code>java.vm.info</code> System Property. Java Virtual Machine |
| * implementation info. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.0 |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_VM_INFO = getSystemProperty( "java.vm.info" ); |
| |
| /** |
| * <p> |
| * The <code>java.vm.name</code> System Property. Java Virtual Machine |
| * implementation name. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_VM_NAME = getSystemProperty( "java.vm.name" ); |
| |
| /** |
| * <p> |
| * The <code>java.vm.specification.name</code> System Property. Java |
| * Virtual Machine specification name. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_VM_SPECIFICATION_NAME = getSystemProperty( "java.vm.specification.name" ); |
| |
| /** |
| * <p> |
| * The <code>java.vm.specification.vendor</code> System Property. Java |
| * Virtual Machine specification vendor. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_VM_SPECIFICATION_VENDOR = getSystemProperty( "java.vm.specification.vendor" ); |
| |
| /** |
| * <p> |
| * The <code>java.vm.specification.version</code> System Property. Java |
| * Virtual Machine specification version. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_VM_SPECIFICATION_VERSION = getSystemProperty( "java.vm.specification.version" ); |
| |
| /** |
| * <p> |
| * The <code>java.vm.vendor</code> System Property. Java Virtual Machine |
| * implementation vendor. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_VM_VENDOR = getSystemProperty( "java.vm.vendor" ); |
| |
| /** |
| * <p> |
| * The <code>java.vm.version</code> System Property. Java Virtual Machine |
| * implementation version. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.2 |
| */ |
| public static final String JAVA_VM_VERSION = getSystemProperty( "java.vm.version" ); |
| |
| /** |
| * <p> |
| * The <code>line.separator</code> System Property. Line separator (<code>"\n<"</code> |
| * on UNIX). |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String LINE_SEPARATOR = getSystemProperty( "line.separator" ); |
| |
| /** |
| * <p> |
| * The <code>os.arch</code> System Property. Operating system |
| * architecture. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String OS_ARCH = getSystemProperty( "os.arch" ); |
| |
| /** |
| * <p> |
| * The <code>os.name</code> System Property. Operating system name. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String OS_NAME = getSystemProperty( "os.name" ); |
| |
| /** |
| * <p> |
| * The <code>os.version</code> System Property. Operating system version. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String OS_VERSION = getSystemProperty( "os.version" ); |
| |
| /** |
| * <p> |
| * The <code>path.separator</code> System Property. Path separator (<code>":"</code> |
| * on UNIX). |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String PATH_SEPARATOR = getSystemProperty( "path.separator" ); |
| |
| /** |
| * <p> |
| * The <code>user.country</code> or <code>user.region</code> System |
| * Property. User's country code, such as <code>GB</code>. First in JDK |
| * version 1.2 as <code>user.region</code>. Renamed to |
| * <code>user.country</code> in 1.4 |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.0 |
| * @since Java 1.2 |
| */ |
| public static final String USER_COUNTRY = ( getSystemProperty( "user.country" ) == null ? getSystemProperty( "user.region" ) |
| : getSystemProperty( "user.country" ) ); |
| |
| /** |
| * <p> |
| * The <code>user.dir</code> System Property. User's current working |
| * directory. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String USER_DIR = getSystemProperty( USER_DIR_KEY ); |
| |
| /** |
| * <p> |
| * The <code>user.home</code> System Property. User's home directory. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String USER_HOME = getSystemProperty( USER_HOME_KEY ); |
| |
| /** |
| * <p> |
| * The <code>user.language</code> System Property. User's language code, |
| * such as <code>"en"</code>. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.0 |
| * @since Java 1.2 |
| */ |
| public static final String USER_LANGUAGE = getSystemProperty( "user.language" ); |
| |
| /** |
| * <p> |
| * The <code>user.name</code> System Property. User's account name. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since Java 1.1 |
| */ |
| public static final String USER_NAME = getSystemProperty( "user.name" ); |
| |
| /** |
| * <p> |
| * The <code>user.timezone</code> System Property. For example: |
| * <code>"America/Los_Angeles"</code>. |
| * </p> |
| * <p> |
| * Defaults to <code>null</code> if the runtime does not have security |
| * access to read this property or the property does not exist. |
| * </p> |
| * <p> |
| * This value is initialized when the class is loaded. If |
| * {@link System#setProperty(String,String)} or |
| * {@link System#setProperties(java.util.Properties)} is called after this |
| * class is loaded, the value will be out of sync with that System property. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public static final String USER_TIMEZONE = getSystemProperty( "user.timezone" ); |
| |
| // Java version |
| // ----------------------------------------------------------------------- |
| // These MUST be declared after those above as they depend on the |
| // values being set up |
| |
| /** |
| * <p> |
| * Gets the Java version as a <code>float</code>. |
| * </p> |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>1.2f</code> for JDK 1.2 |
| * <li><code>1.31f</code> for JDK 1.3.1 |
| * </ul> |
| * <p> |
| * The field will return zero if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final float JAVA_VERSION_FLOAT = getJavaVersionAsFloat(); |
| |
| /** |
| * <p> |
| * Gets the Java version as an <code>int</code>. |
| * </p> |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>120</code> for JDK 1.2 |
| * <li><code>131</code> for JDK 1.3.1 |
| * </ul> |
| * <p> |
| * The field will return zero if {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final int JAVA_VERSION_INT = getJavaVersionAsInt(); |
| |
| // Java version checks |
| // ----------------------------------------------------------------------- |
| // These MUST be declared after those above as they depend on the |
| // values being set up |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.1 (also 1.1.x versions). |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is |
| * <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_1 = getJavaVersionMatches( "1.1" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.2 (also 1.2.x versions). |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is |
| * <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_2 = getJavaVersionMatches( "1.2" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.3 (also 1.3.x versions). |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is |
| * <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_3 = getJavaVersionMatches( "1.3" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.4 (also 1.4.x versions). |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is |
| * <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_4 = getJavaVersionMatches( "1.4" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Java version 1.5 (also 1.5.x versions). |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if {@link #JAVA_VERSION} is |
| * <code>null</code>. |
| * </p> |
| */ |
| public static final boolean IS_JAVA_1_5 = getJavaVersionMatches( "1.5" ); |
| |
| // Operating system checks |
| // ----------------------------------------------------------------------- |
| // These MUST be declared after those above as they depend on the |
| // values being set up |
| // OS names from http://www.vamphq.com/os.html |
| // Selected ones included - please advise commons-dev@jakarta.apache.org |
| // if you want another added or a mistake corrected |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is AIX. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_AIX = getOSMatches( "AIX" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is HP-UX. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_HP_UX = getOSMatches( "HP-UX" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Irix. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_IRIX = getOSMatches( "Irix" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Linux. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_LINUX = getOSMatches( "Linux" ) || getOSMatches( "LINUX" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Mac. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_MAC = getOSMatches( "Mac" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Mac. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_MAC_OSX = getOSMatches( "Mac OS X" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is OS/2. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_OS2 = getOSMatches( "OS/2" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Solaris. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_SOLARIS = getOSMatches( "Solaris" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is SunOS. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_SUN_OS = getOSMatches( "SunOS" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is a POSIX compilant system, as in any of |
| * AIX, HP-UX, Irix, Linux, MacOSX, Solaris or SUN OS. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public static final boolean IS_OS_UNIX = IS_OS_AIX || IS_OS_HP_UX || IS_OS_IRIX || IS_OS_LINUX || IS_OS_MAC_OSX |
| || IS_OS_SOLARIS || IS_OS_SUN_OS; |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS = getOSMatches( OS_NAME_WINDOWS_PREFIX ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows 2000. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS_2000 = getOSMatches( OS_NAME_WINDOWS_PREFIX, "5.0" ); |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows 95. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS_95 = getOSMatches( OS_NAME_WINDOWS_PREFIX + " 9", "4.0" ); |
| |
| // JDK 1.2 running on Windows98 returns 'Windows 95', hence the above |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows 98. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS_98 = getOSMatches( OS_NAME_WINDOWS_PREFIX + " 9", "4.1" ); |
| |
| // JDK 1.2 running on Windows98 returns 'Windows 95', hence the above |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows ME. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS_ME = getOSMatches( OS_NAME_WINDOWS_PREFIX, "4.9" ); |
| |
| // JDK 1.2 running on WindowsME may return 'Windows 95', hence the above |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows NT. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS_NT = getOSMatches( OS_NAME_WINDOWS_PREFIX + " NT" ); |
| |
| // Windows 2000 returns 'Windows 2000' but may suffer from same JDK1.2 |
| // problem |
| |
| /** |
| * <p> |
| * Is <code>true</code> if this is Windows XP. |
| * </p> |
| * <p> |
| * The field will return <code>false</code> if <code>OS_NAME</code> is |
| * <code>null</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public static final boolean IS_OS_WINDOWS_XP = getOSMatches( OS_NAME_WINDOWS_PREFIX, "5.1" ); |
| |
| |
| // ----------------------------------------------------------------------- |
| /** |
| * <p> |
| * SystemUtils instances should NOT be constructed in standard programming. |
| * Instead, the class should be used as |
| * <code>SystemUtils.FILE_SEPARATOR</code>. |
| * </p> |
| * <p> |
| * This constructor is public to permit tools that require a JavaBean |
| * instance to operate. |
| * </p> |
| */ |
| public SystemUtils() |
| { |
| // no init. |
| } |
| |
| |
| // ----------------------------------------------------------------------- |
| /** |
| * <p> |
| * Gets the Java version number as a <code>float</code>. |
| * </p> |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>1.2f</code> for JDK 1.2 |
| * <li><code>1.31f</code> for JDK 1.3.1 |
| * </ul> |
| * |
| * @return the version, for example 1.31f for JDK 1.3.1 |
| * @deprecated Use {@link #JAVA_VERSION_FLOAT} instead. Method will be |
| * removed in Commons Lang 3.0. |
| */ |
| public static float getJavaVersion() |
| { |
| return JAVA_VERSION_FLOAT; |
| } |
| |
| |
| /** |
| * <p> |
| * Gets the Java version number as a <code>float</code>. |
| * </p> |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>1.2f</code> for JDK 1.2 |
| * <li><code>1.31f</code> for JDK 1.3.1 |
| * </ul> |
| * <p> |
| * Patch releases are not reported. Zero is returned if |
| * {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| * |
| * @return the version, for example 1.31f for JDK 1.3.1 |
| */ |
| private static float getJavaVersionAsFloat() |
| { |
| if ( JAVA_VERSION == null ) |
| { |
| return 0f; |
| } |
| String str = JAVA_VERSION.substring( 0, 3 ); |
| if ( JAVA_VERSION.length() >= 5 ) |
| { |
| str = str + JAVA_VERSION.substring( 4, 5 ); |
| } |
| return Float.parseFloat( str ); |
| } |
| |
| |
| /** |
| * <p> |
| * Gets the Java version number as an <code>int</code>. |
| * </p> |
| * <p> |
| * Example return values: |
| * </p> |
| * <ul> |
| * <li><code>120</code> for JDK 1.2 |
| * <li><code>131</code> for JDK 1.3.1 |
| * </ul> |
| * <p> |
| * Patch releases are not reported. Zero is returned if |
| * {@link #JAVA_VERSION} is <code>null</code>. |
| * </p> |
| * |
| * @return the version, for example 131 for JDK 1.3.1 |
| */ |
| private static int getJavaVersionAsInt() |
| { |
| if ( JAVA_VERSION == null ) |
| { |
| return 0; |
| } |
| String str = JAVA_VERSION.substring( 0, 1 ); |
| str = str + JAVA_VERSION.substring( 2, 3 ); |
| if ( JAVA_VERSION.length() >= 5 ) |
| { |
| str = str + JAVA_VERSION.substring( 4, 5 ); |
| } |
| else |
| { |
| str = str + "0"; |
| } |
| return Integer.parseInt( str ); |
| } |
| |
| |
| /** |
| * <p> |
| * Decides if the java version matches. |
| * </p> |
| * |
| * @param versionPrefix |
| * the prefix for the java version |
| * @return true if matches, or false if not or can't determine |
| */ |
| private static boolean getJavaVersionMatches( String versionPrefix ) |
| { |
| if ( JAVA_VERSION == null ) |
| { |
| return false; |
| } |
| return JAVA_VERSION.startsWith( versionPrefix ); |
| } |
| |
| |
| /** |
| * <p> |
| * Decides if the operating system matches. |
| * </p> |
| * |
| * @param osNamePrefix |
| * the prefix for the os name |
| * @return true if matches, or false if not or can't determine |
| */ |
| private static boolean getOSMatches( String osNamePrefix ) |
| { |
| if ( OS_NAME == null ) |
| { |
| return false; |
| } |
| return OS_NAME.startsWith( osNamePrefix ); |
| } |
| |
| |
| /** |
| * <p> |
| * Decides if the operating system matches. |
| * </p> |
| * |
| * @param osNamePrefix |
| * the prefix for the os name |
| * @param osVersionPrefix |
| * the prefix for the version |
| * @return true if matches, or false if not or can't determine |
| */ |
| private static boolean getOSMatches( String osNamePrefix, String osVersionPrefix ) |
| { |
| if ( OS_NAME == null || OS_VERSION == null ) |
| { |
| return false; |
| } |
| return OS_NAME.startsWith( osNamePrefix ) && OS_VERSION.startsWith( osVersionPrefix ); |
| } |
| |
| |
| // ----------------------------------------------------------------------- |
| /** |
| * <p> |
| * Gets a System property, defaulting to <code>null</code> if the property |
| * cannot be read. |
| * </p> |
| * <p> |
| * If a <code>SecurityException</code> is caught, the return value is |
| * <code>null</code> and a message is written to <code>System.err</code>. |
| * </p> |
| * |
| * @param property |
| * the system property name |
| * @return the system property value or <code>null</code> if a security |
| * problem occurs |
| */ |
| private static String getSystemProperty( String property ) |
| { |
| try |
| { |
| return System.getProperty( property ); |
| } |
| catch ( SecurityException ex ) |
| { |
| // we are not allowed to look at this property |
| System.err.println( I18n.err( I18n.ERR_04437, property ) ); |
| return null; |
| } |
| } |
| |
| |
| /** |
| * <p> |
| * Is the Java version at least the requested version. |
| * </p> |
| * <p> |
| * Example input: |
| * </p> |
| * <ul> |
| * <li><code>1.2f</code> to test for JDK 1.2</li> |
| * <li><code>1.31f</code> to test for JDK 1.3.1</li> |
| * </ul> |
| * |
| * @param requiredVersion |
| * the required version, for example 1.31f |
| * @return <code>true</code> if the actual version is equal or greater |
| * than the required version |
| */ |
| public static boolean isJavaVersionAtLeast( float requiredVersion ) |
| { |
| return ( JAVA_VERSION_FLOAT >= requiredVersion ); |
| } |
| |
| |
| /** |
| * <p> |
| * Is the Java version at least the requested version. |
| * </p> |
| * <p> |
| * Example input: |
| * </p> |
| * <ul> |
| * <li><code>120</code> to test for JDK 1.2 or greater</li> |
| * <li><code>131</code> to test for JDK 1.3.1 or greater</li> |
| * </ul> |
| * |
| * @param requiredVersion |
| * the required version, for example 131 |
| * @return <code>true</code> if the actual version is equal or greater |
| * than the required version |
| * @since 2.0 |
| */ |
| public static boolean isJavaVersionAtLeast( int requiredVersion ) |
| { |
| return ( JAVA_VERSION_INT >= requiredVersion ); |
| } |
| |
| |
| /** |
| * Returns whether the {@link #JAVA_AWT_HEADLESS} value is <code>true</code>. |
| * |
| * @return <code>true</code> if <code>JAVA_AWT_HEADLESS</code> is |
| * <code>"true"</code>, <code>false</code> otherwise. |
| * @see #JAVA_AWT_HEADLESS |
| * @since 2.1 |
| * @since Java 1.4 |
| */ |
| public static boolean isJavaAwtHeadless() |
| { |
| return JAVA_AWT_HEADLESS != null ? JAVA_AWT_HEADLESS.equals( Boolean.TRUE.toString() ) : false; |
| } |
| |
| |
| /** |
| * <p> |
| * Gets the Java home directory as a <code>File</code>. |
| * </p> |
| * |
| * @return a directory |
| * @throws SecurityException |
| * if a security manager exists and its |
| * <code>checkPropertyAccess</code> method doesn't allow |
| * access to the specified system property. |
| * @see System#getProperty(String) |
| */ |
| public static File getJavaHome() |
| { |
| return new File( System.getProperty( JAVA_HOME_KEY ) ); |
| } |
| |
| |
| /** |
| * <p> |
| * Gets the Java IO temporary directory as a <code>File</code>. |
| * </p> |
| * |
| * @return a directory |
| * @throws SecurityException |
| * if a security manager exists and its |
| * <code>checkPropertyAccess</code> method doesn't allow |
| * access to the specified system property. |
| * @see System#getProperty(String) |
| */ |
| public static File getJavaIoTmpDir() |
| { |
| return new File( System.getProperty( JAVA_IO_TMPDIR_KEY ) ); |
| } |
| |
| |
| /** |
| * <p> |
| * Gets the user directory as a <code>File</code>. |
| * </p> |
| * |
| * @return a directory |
| * @throws SecurityException |
| * if a security manager exists and its |
| * <code>checkPropertyAccess</code> method doesn't allow |
| * access to the specified system property. |
| * @see System#getProperty(String) |
| */ |
| public static File getUserDir() |
| { |
| return new File( System.getProperty( USER_DIR_KEY ) ); |
| } |
| |
| |
| /** |
| * <p> |
| * Gets the user home directory as a <code>File</code>. |
| * </p> |
| * |
| * @return a directory |
| * @throws SecurityException |
| * if a security manager exists and its |
| * <code>checkPropertyAccess</code> method doesn't allow |
| * access to the specified system property. |
| * @see System#getProperty(String) |
| */ |
| public static File getUserHome() |
| { |
| return new File( System.getProperty( USER_HOME_KEY ) ); |
| } |
| |
| } |
