用数字表示 JFrame 上的位置

[java]代码库

   public HelloWorld()
   {
      super();
      this.setSize(300, 200);
     this.getContentPane().setLayout(null);
      this.add(getJLabel(),null);
     this.add(getJTextField(), null);
      this.add(getJButton(),null);
     this.setTitle("HelloWorld");
   }
  
   private javax.swing.JLabel getJLabel() {
      if(jLabel == null) {
        jLabel = new javax.swing.JLabel();
        jLabel.setBounds(34, 49, 53, 18);
        jLabel.setText("Name:");
      }
      return jLabel;
   }
  
   private javax.swing.JTextFieldgetJTextField() {
      if(jTextField == null){
        jTextField = new javax.swing.JTextField();
        jTextField.setBounds(96, 49, 160, 20);
      }
      return jTextField;
   }
  
   private javax.swing.JButton getJButton(){
      if(jButton == null) {
        jButton = new javax.swing.JButton();
        jButton.setBounds(103, 110, 71, 27);
        jButton.setText("OK");
      }
      return jButton;
   }