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| import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
public class Fenetre extends JFrame{
protected JPasswordField pwd;
protected JButton ok;
protected JButton reset;
public Fenetre(){
super("JPassword");
initComponent();
pack();
setLocationRelativeTo(null);
setVisible(true);
}
private void initComponent(){
setDefaultCloseOperation(EXIT_ON_CLOSE);
pwd = new JPasswordField();
pwd.addKeyListener(new KeyAdapter() {
public void keyReleased(KeyEvent e) {
if(pwd.getPassword().length != 0 ){
ok.setEnabled(true);
}else{
ok.setEnabled(false);
}
}
});
ok = new JButton("OK");
ok.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("pwd="+new String(pwd.getPassword()));
}
});
ok.setEnabled(false);
reset = new JButton("Reset");
reset.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
pwd.setText("");
ok.setEnabled(false);
}
});
add("Center", pwd);
JPanel pane = new JPanel();
pane.add(reset);
pane.add(ok);
add("South", pane);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Fenetre f = new Fenetre();
}
} |
