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code-style UseStringBufferForStringAppends (PMD)

Prefer StringBuffer over += for concatenating strings

Finds usages of += for appending strings.

      
public class Foo {
 void bar() {
  String a;
  a = "foo";
  a += " bar";
  // better would be:
  // StringBuffer a = new StringBuffer("foo");
  // a.append(" bar);
 }
}
      
           

Additional info can be found at this http://pmd.sourceforge.net/rules/optimizations.html#UseStringBufferForStringAppends site.