src/org/apache/openmeetings/utils/math/GenerateRandom.java

/*
 * 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.openmeetings.utils.math;
import java.util.*;

public class GenerateRandom {
    private static Random rn = new Random();
    public static int rand(int lo, int hi) {
            int n = hi - lo + 1;
            int i = rn.nextInt() % n;
            if (i < 0)
                    i = -i;
            return lo + i;
    }
    public static String randomstring(int lo, int hi) {
            int n = rand(lo, hi);
            byte b[] = new byte[n];
            for (int i = 0; i < n; i++)
                    b[i] = (byte)rand('a', 'z');
            return new String(b, 0, n);
    }
}