Editing Standard Widget Toolkit (section)

=== Programming ===
[[File:Screenshot-swt-helloworld.png|thumb|A simple GUI application using SWT running in a [[GTK]] environment]]

The following is a basic [["Hello, World!" program]] using SWT. It shows a window (''Shell'') and a label.
<syntaxhighlight lang="java">
import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;

public class HelloWorld
{
   public static void main (String[] args)
   {
      Display display = new Display();
      Shell shell = new Shell(display);
      Label label = new Label(shell, SWT.NONE);
      label.setText("Hello, World!");
      label.pack();
      shell.pack();
      shell.open();
      while (!shell.isDisposed())
      {
         if (!display.readAndDispatch()) display.sleep();
      }
      display.dispose();
   }
}
</syntaxhighlight>
Contrary to [[Swing (Java)|Swing]], a ''Display'' class is necessary to access the underlying [[operating system]], and its resources must be explicitly disposed of when they are no longer used.