swing中单击回车相当于点击登录

public aaa() {
  initComponents();
  this.getRootPane().setDefaultButton(this.jButton1);//获取焦点
  this.jButton1.addKeyListener(new KeyAdapter() {
   public void keyPressed(KeyEvent event) {
    if (event.getKeyText(event.getKeyCode()).compareToIgnoreCase(
      "Enter") == 0) {
     doClick();
    }
   }
  });
 }
 public void doClick() {
  this.jButton1.doClick();
 }