Eclipse Plug-in Development Beginner's Guide - Second Edition

Managing resources

One of the challenges in adopting SWT is that native resources must be disposed when they are no longer needed. Unlike AWT or Swing, which perform these operations automatically when an object is garbage-collected, SWT needs manual resource management.

Note

Why does SWT need manual resource management?

A common question asked is why SWT has this rule when Java has had perfectly acceptable garbage collection for many years. In part, it's because SWT pre-dates acceptable garbage collection, but it's also to try and return native resources as soon as they are no longer needed.

From a performance perspective, adding a finalize method to an object also causes the garbage collector to work harder; much of the speed in today's garbage ...