Java对话框详细实例能得到用户的各种选择

      package hytc.hehuahong;

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

@SuppressWarnings("serial")
public class DemoInputDialog extends JFrame implements ActionListener {

	JLabel messgeJLb;
	JButton inputDialogJBtn;
	JButton messageDialogJBtn;
	JButton confirmDialogJBtn;
	JButton optionDialogJBtn;
	
	public DemoInputDialog(){
		messgeJLb=new JLabel();
		messgeJLb.setHorizontalAlignment(SwingConstants.CENTER);
		messgeJLb.setFont(new Font("宋体",Font.PLAIN,28));
		messgeJLb.setText(getName());
		
		System.out.println(JOptionPane.CLOSED_OPTION);
		System.out.println(JOptionPane.YES_OPTION);
		System.out.println(JOptionPane.NO_OPTION);
		System.out.println(JOptionPane.CANCEL_OPTION);
		System.out.println(JOptionPane.OK_OPTION);
		
		//对话框
		inputDialogJBtn=new JButton("InputDialog");
		inputDialogJBtn.setActionCommand("inputDialog");
		inputDialogJBtn.addActionListener(this);
		
		messageDialogJBtn=new JButton("MessageDialog");
		messageDialogJBtn.setActionCommand("MessageDialog");
		messageDialogJBtn.addActionListener(this);
		
		confirmDialogJBtn=new JButton("ConfirmDialog");
		confirmDialogJBtn.setActionCommand("ConfirmDialog");
		confirmDialogJBtn.addActionListener(this);
		
		optionDialogJBtn=new JButton("OptionDialog");
		optionDialogJBtn.setActionCommand("OptionDialog");
		optionDialogJBtn.addActionListener(this);
		
		//
		this.add(messgeJLb,BorderLayout.NORTH);
		this.add(messageDialogJBtn,BorderLayout.CENTER);
		this.add(inputDialogJBtn,BorderLayout.EAST);
		this.add(confirmDialogJBtn,BorderLayout.WEST);
		this.add(optionDialogJBtn,BorderLayout.SOUTH);
		this.setBounds(20,20,500,350);
		this.setTitle("InputDialog examp");
		this.setVisible(true);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
	
	public void actionPerformed(ActionEvent e){
		int messageType;
		if(e.getActionCommand().equals("inputDialog")){
			String message="请输入内容：";
			String messageTitle="输入对话框";
			messageType=JOptionPane.INFORMATION_MESSAGE;
		
			String inputMessage=(String) JOptionPane.showInputDialog(this,message,messageTitle,messageType);
			//必须先判断是否味null
			if(inputMessage !=null && !inputMessage.equals("")){
				this.messgeJLb.setText(inputMessage);
			}
			else
			{
				this.messgeJLb.setText("没有输入内容！");
				JOptionPane.showMessageDialog(this, "没有输入内容！", "提示", messageType);
//				int result=JOptionPane.showMessageDialog(this, "没有输入内容！", "提示", messageType);
//				switch(result){
//				case (int)JOptionPane.OK_OPTION:
//					this.messgeJLb.setText("OK_OPTION");break;
//				default :this.messgeJLb.setText("CLOSED_OPTION");break;
//				}没有返回值
				
			}
		}
		else if(e.getActionCommand().equals("ConfirmDialog")){
			messageType=JOptionPane.INFORMATION_MESSAGE;
			int result=JOptionPane.showConfirmDialog(this, "ConfirmDialog", "test", messageType, JOptionPane.YES_NO_CANCEL_OPTION);
			switch(result){
			case (int)JOptionPane.YES_OPTION:
				this.messgeJLb.setText("Yes_OPTION");break;
			case (int)JOptionPane.NO_OPTION:
				this.messgeJLb.setText("NO_OPTION");break;
			case (int)JOptionPane.CANCEL_OPTION:
				this.messgeJLb.setText("CANCEL_OPTION");break;
			default :this.messgeJLb.setText("CLOSED_OPTION");break;
			}
		}
		else if(e.getSource()==optionDialogJBtn){
			Object []options={"ni hao","Hello"};
			messageType=JOptionPane.INFORMATION_MESSAGE;
			int result=JOptionPane.showOptionDialog(this, "optionDialogJBtn", "test", JOptionPane.OK_CANCEL_OPTION, messageType,null,options,options[1]);
			this.messgeJLb.setText(options[result].toString());
			
		}
	}
	

	public static void main(String[] args) {

		new DemoInputDialog();
	}

}