commit 57a9a5c14b1bdac50fdf737c63c880a5fb9e106a
author Gary Gregory <garydgregory@gmail.com> Sun Jan 17 09:15:16 2021 -0500
committer Gary Gregory <garydgregory@gmail.com> Sun Jan 17 09:15:16 2021 -0500
tree 078f59d7529320205202e44fbcad884ab20932b6
parent b7dd3fd3d11df92e3f653f001e1a924a9fc49b73

Use isEmpty().

src/main/java/org/apache/commons/math4/complex/ComplexFormat.java

diff --git a/src/main/java/org/apache/commons/math4/complex/ComplexFormat.java b/src/main/java/org/apache/commons/math4/complex/ComplexFormat.java
index 34fc506..85ab925 100644
--- a/src/main/java/org/apache/commons/math4/complex/ComplexFormat.java
+++ b/src/main/java/org/apache/commons/math4/complex/ComplexFormat.java
@@ -146,7 +146,7 @@
         if (imaginaryCharacter == null) {
             throw new NullArgumentException();
         }
-        if (imaginaryCharacter.length() == 0) {
+        if (imaginaryCharacter.isEmpty()) {
             throw new NoDataException();
         }
         if (imaginaryFormat == null) {