Convert string concatenations into StringBuilder or MessageFormat calls with Eclipse's Quick Fix | Eclipse On E

So with one key, it will turn code like this:

1	System.out.println("The year " + year + " is a leap year.");

Into this:

1 2 3 4 5

StringBuilder message = new StringBuilder(); message.append("The year "); message.append(year); message.append(" is a leap year."); System.out.println(message.toString());

First select the string part that you want to convert. The quickest way is to use the Select Enclosing Element shortcut (Alt+Shift+Up) to quickly select the parts of the string. Then press Ctrl+1 and select Use StringBuilder for string concatenation.

Just to show you how nice this feature is and how much time it can save, here’s a video that converts a 3 part string into 3 calls to a StringBuilder variable called message.As an added bonus, you can also convert the concatenation into a call to MessageFormat, but only if the concatenation contains a variable part. After you press Ctrl+1 just select Use MessageFormat for string concatenation. The example above should look something like this:

System.out.println(MessageFormat.format("Playing {0} is fun.", soccer));

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