Description Alex Blewitt 2016-04-22 17:44:47 EDT

There are a number of places in existing Java code that are written as:

import java.util.Date;
public class Test {
  public static void main(String args[]) throws Exception {
    StringBuffer buffer = new StringBuffer();
    buffer.append("foo" + new Date() + "bar");
  }
}

(see also bug 492230)

This will result in two StringBuffers being initialised; one to perform the implicit String concatenation, and the other initialised explicitly on the first line.

We should generate a warning when this occurs and offer a quick-fix to re-write this as:

buffer.append("foo").append(new Date()).append("bar");