chexkboxframe.java

jbuilder2006一书的所有源代码

package control;

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

public class ChexkBoxFrame extends JFrame implements ItemListener {
  JPanel contentPane;
  JCheckBox jCheckBox1 = new JCheckBox();
  JCheckBox jCheckBox2 = new JCheckBox();
  JCheckBox jCheckBox3 = new JCheckBox();

  public ChexkBoxFrame() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(null);
    this.setSize(new Dimension(400, 300));
    this.setTitle("ChexkBox示例");
    jCheckBox1.setText("复选框1");
    jCheckBox1.setBounds(new Rectangle(113, 67, 149, 31));
    jCheckBox1.addItemListener(this);
    jCheckBox2.setText("复选框2");
    jCheckBox2.setBounds(new Rectangle(113, 120, 149, 31));
    jCheckBox2.addItemListener(this);
    jCheckBox3.setText("复选框3");
    jCheckBox3.setBounds(new Rectangle(113, 172, 149, 31));
    jCheckBox3.addItemListener(this);
    contentPane.add(jCheckBox1, null);
    contentPane.add(jCheckBox2, null);
    contentPane.add(jCheckBox3, null);
  }

  protected void processWindowEvent(WindowEvent e) {
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
  public void itemStateChanged(ItemEvent e) {
    //取得复选框
    JCheckBox tempCheckBox = (JCheckBox)e.getSource();
    if(tempCheckBox.isSelected()){
      JOptionPane.showMessageDialog(null, tempCheckBox.getText() + "被选择.");
    }else{
      JOptionPane.showMessageDialog(null, tempCheckBox.getText() + "取消选择.");
    }
  }
}