Create a loading image in Java desktop application

This code are equals with

Application.ProcessMessages

in Delphi or

Application.DoEvents

in VB

                     lblLoading.setVisible(true);  
                     new Thread(new Runnable() {  
                          private boolean done = false;  
                          @Override  
                          public void run() {  
                               // time consuming algorithm.  

                               done = true;  
                               if (done) {  
                                    SwingUtilities.invokeLater(new Runnable() {  
                                         @Override  
                                         public void run() {  
                                              lblLoading.setVisible(false);  
                                         }  
                                    });  
                               }  
                          }  
                     }).start();