JPasswordField With Key Event In Java Example

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import java.awt.BorderLayout;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JPasswordField;

public class JavaPasswordFieldEchoChar extends JFrame  {
	
	public static void main(String[] args) {
		JavaPasswordFieldEchoChar that = new JavaPasswordFieldEchoChar();
	    that.setVisible(true);
	  }

	  public JavaPasswordFieldEchoChar() {
	    setSize(450, 350);

	    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	    getContentPane().add(new PasswordPanel(), BorderLayout.SOUTH);
	  }
	}

	class PasswordPanel extends JPanel {
	  JPasswordField pwf;

	  public PasswordPanel() {
	    pwf = new JPasswordField(10);
	    pwf.setEchoChar('#');
	    add(pwf);

	    pwf.addKeyListener(new KeyAdapter() {
	      public void keyReleased(KeyEvent e) {
	        System.out.println(new String(pwf.getPassword()));
	      }
	    });
	  }
}
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