joptionpaneusedemo.java

JAVA编程思想源代码 值得一下 很难找的

package chapter11;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class JOptionPaneUseDemo extends JFrame {
	public static final int WIDTH = 300;

	public static final int HEIGHT = 300;

	private JButton logoutButton, logInButton;

	private JTextField myTextField;

	public JOptionPaneUseDemo() {
		setTitle("JOptionPaneUseDemo");
		setSize(WIDTH, HEIGHT);

		Container contentPane = getContentPane();

		// 建立容器面板
		JPanel buttonPanel = new JPanel();
		myTextField = new JTextField("JOptionPane示例");
		logInButton = new JButton("登入");
		logoutButton = new JButton("退出");
		// 注册事件监听器
		logoutButton.addActionListener(new LogoutAction());
		buttonPanel.add(myTextField);
		buttonPanel.add(logInButton);
		buttonPanel.add(logoutButton);

		contentPane.add(buttonPanel, BorderLayout.SOUTH);
	}

	// 实现事件监听器
	private class LogoutAction implements ActionListener {
		public void actionPerformed(ActionEvent event) {
			// 使用消息框产生确认对话框
			int selection = JOptionPane.showConfirmDialog(
					JOptionPaneUseDemo.this, "您确定要退出", "退出确认",
					JOptionPane.OK_CANCEL_OPTION, JOptionPane.WARNING_MESSAGE);

			// 如果选择了“确认”按钮，则退出
			if (selection == JOptionPane.OK_OPTION) {
				System.exit(0);
			}
		}
	}

	public static void main(String[] args) {
		JOptionPaneUseDemo frame = new JOptionPaneUseDemo();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);

	}

}