Use isEmpty().

Author: garydgregory

src/main/java/org/apache/commons/cli/HelpFormatter.java

@@ -539,7 +539,7 @@ public void printHelp(final PrintWriter pw, final int width, final String cmdLin
                           final String header, final Options options, final int leftPad,
                           final int descPad, final String footer, final boolean autoUsage)
     {
-        if (cmdLineSyntax == null || cmdLineSyntax.length() == 0)
+        if (cmdLineSyntax == null || cmdLineSyntax.isEmpty())
         {
             throw new IllegalArgumentException("cmdLineSyntax not provided");
         }
@@ -826,7 +826,7 @@ protected StringBuffer renderOptions(final StringBuffer sb, final int width, fin
             if (option.hasArg())
             {
                 final String argName = option.getArgName();
-                if (argName != null && argName.length() == 0)
+                if (argName != null && argName.isEmpty())
                 {
                     // if the option has a blank argname
                     optBuf.append(' ');
@@ -1045,7 +1045,7 @@ protected String createPadding(final int len)
      */
     protected String rtrim(final String s)
     {
-        if (s == null || s.length() == 0)
+        if (s == null || s.isEmpty())
         {
             return s;
         }