Java seem it not portalble !!!

Question

Could you please run and compare demo between OS windows and linux.
Demo code:
import java.awt.event.*;
import javax.swing.*;
public class TestTheDialog1 extends JFrame implements ActionListener {
     JButton myButton = null;
     public TestTheDialog1() {
          super("TestTheDialog Tester");
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          myButton = new JButton("Test the dialog!");
          myButton.addActionListener(this);
          setLocationRelativeTo(null);
          getContentPane().add(myButton);
          setSize(300,200);
          setVisible(true);
     public void actionPerformed(ActionEvent e) {
          if(myButton == e.getSource()) {
               System.err.println("Opening dialog.");
               int answer = JOptionPane.showConfirmDialog(this,"Do you like Java?","Please answer",JOptionPane.YES_NO_OPTION);
               if (answer==JOptionPane.YES_OPTION) {
               System.err.println("User chose yes.");
               System.err.println("The answer stored in CustomDialog is 'true' (i.e. user clicked yes button.)");
          else {
               System.err.println("User chose no.");
               System.err.println("The answer stored in CustomDialog is 'false' (i.e. user clicked no button.)");
               System.err.println("After opening dialog.");
     public static void main(String argv[]) {
          new TestTheDialog1();
On windows, when JOtionPane is showing, frame TestTheDialog CAN NOT perform action as minimize, maximize, exit or move. this is TRUE
but on OS linux (suse) I CAN perform these action, this is FALSE
Please help me make consistant
thanks very much.

Answer 1

Thanks everybody for more discuss,
I expect when run demo on linux the result like OS
windowsYou need to adjust your expectations, then. "Portable" means the code will run on any platform for which there is a JVM. It doesn't mean "will make every platform work the same way"
I tried change code above but i can not create effect
, Could you please customize above code, please help
me, thanks you very muchIt's not actually a good idea to. Users have certain expectations of how an application will behave on the OS they use. If you start mucking about with that and making applications behave unnaturally, the user may assume there's something wrong, and they may find your application odd to use. Not desirable