Eclipse: Convert String Concat to StringBuilder

Here is a simple yet effective trick for all Eclipse users. In Java we do lot of String concatenation using plain old “” + “”. It is easy but not too effective. StringBuilder is always preferred if you have too many strings to concate.

In below screencast, I convert concatenated strings to StringBuilder using eclipse Ctrl + 1 option.

eclipse-string-concatenate-stringbuilder

Move cursor on String “foo” and press Ctrl + 1. It opens a context menu. Select option Use “StringBuilder” for string concatenation


String foo = "This" + "is" + "Sparta";
        
System.out.println(foo);

Once done, the code will be converted to below:


StringBuilder stringBuilder = new StringBuilder();
                stringBuilder.append("This");
                stringBuilder.append("is");
                stringBuilder.append("Sparta");
String foo = stringBuilder.toString();
        
System.out.println(foo);

Enjoy