usefocuslistenerbeandemo.java~15~

jbuilder2006一书的所有源代码

package event;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class UseFocusListenerBeanDemo extends JFrame {
  JPanel contentPane = new JPanel();
  JLabel jLabel1 = new JLabel();
  FlowLayout flowLayout1 = new FlowLayout();
  //创建2个编辑框
  JTextField jTextField1 = new JTextField();
  JTextField jTextField2 = new JTextField();

  public UseFocusListenerBeanDemo() {
    try {
      jbInit();
    }
    catch (Exception e) {}
  }
  //窗口关闭时清空内存
  protected void processWindowEvent(WindowEvent e) {
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  public static void main(String[] args) {
    UseFocusListenerBeanDemo frame = new UseFocusListenerBeanDemo();
    frame.setVisible(true);
  }

  private void jbInit() throws Exception {
    contentPane = (JPanel)this.getContentPane();
    setTitle("应用FocusListenerBeanDemo类示例");
    setSize(new Dimension(400, 110));
    contentPane.setLayout(flowLayout1);
    //设置标签的标题
    jLabel1.setText("编辑框只能输入数字,不能输入字符:");
    //设置编辑框的大小
    jTextField1.setPreferredSize(new Dimension(100, 30));
    jTextField2.setPreferredSize(new Dimension(100, 30));
    //创建JavaBean
    FocusListenerBeanDemo focusListenerBeanDemo = new FocusListenerBeanDemo();
    //加入聚焦接收器
    jTextField1.addFocusListener(focusListenerBeanDemo);
    jTextField2.addFocusListener(focusListenerBeanDemo);
    //向容器加入各个控件
    contentPane.add(jLabel1, null);
    contentPane.add(jTextField1, null);
    contentPane.add(jTextField2, null);
  }
}