optionpanedemo.java

电子工业出版社出版的《java2应用开发指南》配套光盘源代码

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

public class OptionPaneDemo extends JFrame implements ActionListener
{
	//创建四个功能按钮
	JButton btnMessage=new JButton("显示消息对话框");
	JButton btnConfirm=new JButton("显示确认对话框");
	JButton btnInput=new JButton("显示输入对话框");
	JButton btnOption=new JButton("显示选项对话框");
		
	public OptionPaneDemo() {
		//设置框架窗体标题
		super("JOptionPaneDemo Demo");
		//给四个功能按钮添加事件监听器
		btnMessage.addActionListener(this);
		btnConfirm.addActionListener(this);
		btnInput.addActionListener(this);
		btnOption.addActionListener(this);
		//设置内容窗格的布局管理器为FlowLayout
		getContentPane().setLayout(new FlowLayout());
		//把四个功能按钮加入到内容窗格中
		getContentPane().add(btnMessage);
		getContentPane().add(btnConfirm);
		getContentPane().add(btnInput);
		getContentPane().add(btnOption);
		//显示框架窗体
		pack();
		setVisible(true);
	}

  //程序的入口方法
	public static void main(String[] args) 
	{
		OptionPaneDemo frame=new OptionPaneDemo();
		//设置框架窗体的事件监听(关闭窗体事件)
		frame.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});		
	}
	//处理按钮事件
	public void actionPerformed(ActionEvent e) 
	{
		Object objCommand=e.getSource();
		
		if( objCommand == btnMessage)
			JOptionPane.showMessageDialog(this,"这是个消息框对话框");
		else if (objCommand == btnConfirm )
			JOptionPane.showConfirmDialog(this,"这是个确认框对话框");
		else if (objCommand == btnInput )
			JOptionPane.showInputDialog(this,"这是个输入框对话框");
		else {
			Object[] options = {"确定","取消"};
			JOptionPane.showOptionDialog(this,
						"这是个选项对话框",
						"选项对话框标题",
						JOptionPane.YES_OPTION,
                        JOptionPane.QUESTION_MESSAGE,
                        null,
                        options,
                        options[0]);
		}
			
	}	
}