public class TestView extends ViewPart {

	private Label label;
	private String jobId;
	private Display display;

	public TestView() {
		System.out.println("TestView.TestView()");
	}

        @Override
	public void createPartControl(Composite parent) {
		this.setContentDescription("This is just a test.");

		GridLayoutFactory.fillDefaults().applyTo(parent);

		label = new Label(parent, SWT.BOLD | SWT.BORDER);
		jobId = UUID.randomUUID().toString();

		System.out.println("Job ID: " + jobId);

		display = parent.getDisplay();

		Job job = new Job(jobId) {
			protected IStatus run(IProgressMonitor monitor) {
				// Assume this getTime() method takes a long time
				final String newString = GregorianCalendar.getInstance()
						.getTime().toString();
				System.out.println("new Time: " + newString);

				display.asyncExec(new Runnable() {
					public void run() {
						// Updating UI has to happen in a thread that is called
						// by display.asyncExec.
						updateLabel(newString);
					}
				});
				return Status.OK_STATUS;
			}
		};
		job.schedule();
	}

	@Override
	public void setFocus() {
		System.out.println("TestView.setFocus()");
		label.setFocus();
	}

	private void updateLabel(String newString) {
		System.out.println("TestView.updateLabel()");
		if (!label.isDisposed()) {
			label.setText(newString);
		}
	}
}

UIJob job = new UIJob(jobId) {
   protected IStatus runInUIThread(IProgressMonitor monitor) {
     // Assume this getTime() method takes a long time
     String newString = GregorianCalendar.getInstance().getTime().toString();
     System.out.println("new Time: " + newString);
     updateLabel(newString);

     schedule(2000);
     return Status.OK_STATUS;
   }
};

job.schedule();

label = new Label(parent, SWT.BOLD | SWT.BORDER);
label.setText(GregorianCalendar.getInstance()
	.getTime().toString());