package com.siwuxie095.showdialog;

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import java.awt.BorderLayout;

import java.awt.EventQueue;

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import javax.swing.JFrame;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.UIManager;

import javax.swing.UnsupportedLookAndFeelException;

import javax.swing.border.EmptyBorder;

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import com.sun.java.swing.plaf.windows.WindowsLookAndFeel;

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import javax.swing.JButton;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

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public class TestMessageDialog extends JFrame {

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private JPanel contentPane;

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/**

* Launch the application.

*/

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

TestMessageDialog frame = new TestMessageDialog();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

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/**

* Create the frame.

*/

public TestMessageDialog() {

try {

UIManager.setLookAndFeel(new WindowsLookAndFeel());

} catch (UnsupportedLookAndFeelException e1) {

e1.printStackTrace();

}

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 450, 300);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

contentPane.setLayout(new BorderLayout(0, 0));

setContentPane(contentPane);

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JButton btnshowmessagedialog = new JButton("顯示消息框(showMessageDialog)");

btnshowmessagedialog.setFocusable(false);

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//為 按鈕 添加鼠標點擊事件

btnshowmessagedialog.addMouseListener(new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent e) {

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/**

* 直接通過靜態方法調用

* 需要指定父級窗體，消息，標題，消息類型

* 返回值是 void，即不會向系統返回任何信息

* 即消息框僅僅是為了向用戶傳達信息

* 沒有關閉消息框時，后面的主窗體是完全無法操作的（即 阻塞）

*/

JOptionPane.showMessageDialog(TestMessageDialog.this,

"NullPointerException","Error", JOptionPane.ERROR_MESSAGE);

}

});

contentPane.add(btnshowmessagedialog, BorderLayout.NORTH);

}

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}