Using javax.swing.JDialog

public class MyDiaglog extends JDialog { private JButton jButton1 = new JButton(); private JTextField jTextField1 = new JTextField(); public MyDiaglog() { this(null, "", false); setVisible(true); } public MyDiaglog(Frame parent, String title, boolean modal) { super(parent, title, modal); try { jbInit(); } catch (Exception e) { e.printStackTrace(); } } private void jbInit() throws Exception { this.setSize( new Dimension( 400, 300 ) ); this.getContentPane().setLayout( null ); jButton1.setText("jButton1"); jButton1.setBounds(new Rectangle(270, 50, 73, 22)); jTextField1.setBounds(new Rectangle(130, 85, 110, 20)); this.getContentPane().add(jTextField1, null); this.getContentPane().add(jButton1, null); jButton1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jButton1_actionPerformed(e); } }); } private void jButton1_actionPerformed(ActionEvent e) { jTextField1.setText("hello"); } }

using ThreadLocal()

Have you ever needed variables that were local to the scope of a thread, where each thread managed its storage, and it would be impossible for one thread to access the state information of another thread?

import java.util.Random; public class ThreadLocal1 { // Define/create thread local variable static ThreadLocal threadLocal = new ThreadLocal(); // Create class variable static volatile int counter = 0; // For random number generation static Random random = new Random(); // Displays thread local variable, counter, // and thread name private static void displayValues() { System.out.println ( threadLocal.get() + "\t" + counter + "\t" + Thread.currentThread().getName()); } public static void main (String args[]) { // Each thread increments counter // Displays variable info // And sleeps for the random amount of time // Before displaying info again Runnable runner = new Runnable() { public void run() { synchronized(ThreadLocal1.class) { counter++; } threadLocal.set( new Integer(random.nextInt(1000))); displayValues(); try { Thread.sleep ( ((Integer)threadLocal.get()).intValue()); displayValues(); } catch (InterruptedException e) { e.printStackTrace(); } } }; // Increment counter, access thread local from // a different thread, and display the values synchronized(ThreadLocal1.class) { counter++; } threadLocal.set( new Integer(random.nextInt(1000))); displayValues(); // Here's where the other threads // are actually created for (int i=0; i<5; i++) { Thread t = new Thread(runner); t.start(); } } }