JOptionPane 对话框

JOptionPane 类的静态工厂方法主要创建4种类型的对话框

&1 showMessageDialog----显示一个带有OK 按钮的模态对话框（只能执行当前弹出的对话框）

JAVA 实例：

JOptionPane.showMessageDialog(jl,"欢迎来到本店","Dialog的标题",JOptionPane.INFORMATION_MESSAGE);

&2 showOptionDialog-----这个函数可以改变显示在按钮上的文字,并且可以自定义选项

JAVA实例：

Object [] options = {"百合花","白玫瑰","小雏菊","黄玫瑰"};

int index = JOptionPane.showOptionDialog(jp,"你喜欢什么花？","对话框标题",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE,null,options,options[3]);

&3 showConfirmDialog----这个函数只用了两个选项yes/no

JAVA实例：

int n = JOptionPane.showConfirmDialog(jl,"最近过的好吗？","对话框标题",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);

&4 showInputDialog-----这个函数用于向文本框直接添加内容

JOptionPane.showInputDialog(jl,"请输入您最想吃的菜：" ,"Dialog的标题",JOptionPane.PLAIN_MESSAGE);

注意：

这里的QUESTION_MESSAGE等等都是用来确立来自可插入外观的图标，用法：JOptionDialog.QUESTION_MESSAGE

特别的 ，JOptionDialog类中表示选项类型的常量如下,用法：JOptionDialog.YES_NO_OPTION

点菜小实例：

package ch10;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.*;
import javax.swing.*;
public class DialogTest extends JFrame implements ActionListener
{
    JPanel jp = new JPanel ();
    JButton jb1 = new JButton("只有ok按钮");
    JButton jb2 = new JButton("Yes/No按钮");
    JButton jb3 = new JButton("YES/No/Cancle3个按钮");
    JButton jb4 = new JButton("YSE/No/Cancle3个按钮（自定义）");
    JButton jb5 = new JButton("输入消息对话框");
    JButton jb6 = new JButton("选项对话框");
    JButton []jbuttonArray = new JButton[]{jb1,jb2,jb3,jb4,jb5,jb6};
    JLabel jl = new JLabel("请依次单击按钮，将得到不同的对话框！");
    public DialogTest()
    {
    	jp.setLayout(new GridLayout(2,3));
    	for(int i=0;i<jbuttonArray.length;i++)
    	{
    		jp.add(jbuttonArray[i]);
    		jbuttonArray[i].addActionListener(this);
    	}
    	this.add(jp);
    	this.add(jl,BorderLayout.SOUTH);
    	this.setTitle("JOptionPane对话框");
    	this.setBounds(200,200,500,200);
    	this.setVisible(true);
    	this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public void actionPerformed(ActionEvent a)
    {
    	if(a.getSource()==jbuttonArray[0])
    	{
    		JOptionPane.showMessageDialog(this, "欢迎光临本店！","只有OK按钮的消息对话框",JOptionPane.INFORMATION_MESSAGE);
    		jl.setText("欢迎，欢迎，热烈欢迎");
    	}
    	else if(a.getSource()==jbuttonArray[1])
    	{
    		int index = JOptionPane.showConfirmDialog(this,"您好，您是第一次光临本店吗？","有YES/ON按钮的确认对话框",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);
    		jl.setText("您是"+((index==0)?"新顾客，欢迎":"老顾客了，欢迎。"));
    	}
    	else if(a.getSource()==jbuttonArray[2])
    	{
    		Object[] options = {"喜欢","不喜欢"};
    		int index = JOptionPane.showOptionDialog(this,"您好，您喜欢吃酸菜鱼吗？","有Yes/No按钮（自定义）的确认对话框",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE,null,options,options[0]);
    		jl.setText("我记下了，您"+((index==0)?"喜欢":"不喜欢")+"吃酸菜鱼");
    	}
    	else if(a.getSource()==jbuttonArray[3])
    	{
    		Object[] options = {"好啊，给我也来一份","不了，我们菜够多了","给我来份香辣虾"};
    		int index = JOptionPane.showOptionDialog(this, "你好，尝尝本店招牌菜酸菜鱼吗？","有Yes/No/CANCEL_OPTION的确认对话框", JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE,null,options, options[2]);
    		String reply = (index == 0)?"稍等，您点的酸菜鱼很快就到了":(index==1)?"好的，有需要再喊我":(index==2)? "好的，你点的香辣虾很快就到了":"对不起，请你点菜！";
    		jl.setText(reply);
    	}
    	else if(a.getSource()==jbuttonArray[4])
    	{
    		String dishes = JOptionPane.showInputDialog(this,"请输入您最想吃的菜：","输入信息对话框",JOptionPane.PLAIN_MESSAGE);
    		jl.setText(dishes);
    	}
    	else if(a.getSource()==jbuttonArray[5])
    	{
    		String[] options = new String [] {"香辣虾","酸菜鱼","公安牛肉鱼杂","瓦罐汤"};
    		int index = JOptionPane.showOptionDialog(this,"下面是本店免费赠送的菜，请您选一个，默认是瓦罐汤","选项对话框",JOptionPane.DEFAULT_OPTION,JOptionPane.PLAIN_MESSAGE,null,options,options[3]);
    		String dishes = (index==0)?"香辣虾":(index==1)?"酸菜鱼":(index==2)?"公安牛肉鱼杂":"瓦罐汤";
    		jl.setText("您选择了本店赠送的"+dishes+"!");
    	}
    }
    public static void main(String args[])
    {
    	new DialogTest();
    }
}