Java Jframe Jpanel画桌面程序及Jbutton点击监听事件 IT

下面只是一个使用小demo

package cnom.test.testUtils;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

public class testJframeJpanel {
    public static void main(String[] args) {
        testJframe();
        //        testBox();
    }

    private static void testJframe() {
        JButton jb1, jb2, jb3, jb4, jb5, jb6;
        JPanel jp1, jp2;
        JFrame jf = new JFrame();

        jb1 = new JButton("西瓜");
        jb2 = new JButton("苹果");
        jb3 = new JButton("香蕉");
        jb4 = new JButton("荔枝");
        jb5 = new JButton("葡萄");
        jb6 = new JButton("桔子");

        final JTextField tf = new JTextField();
        tf.setBounds(50, 50, 150, 20);
        jb3.setBounds(100, 50, 65, 30);
        jb3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                tf.setText("This is Banana");
                tf.setBackground(Color.cyan);
                testBox();
            }
        });

        jp1 = new JPanel();
        jp2 = new JPanel();

        jp1.add(jb1);
        jp1.add(jb2);
        jp2.add(jb4);
        jp2.add(jb5);
        jp2.add(jb6);

        jf.add(jp1, BorderLayout.NORTH);
        jf.add(jp2, BorderLayout.SOUTH);
        jf.add(jb3);
        jf.add(tf);

        jf.setTitle("用户登录");
        jf.setSize(400, 200);
        jf.setLocation(300, 300);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        jf.setVisible(true);
    }

    private static void testBox() {
        JFrame jf = new JFrame("用户登录");
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        // 第 1 个 JPanel, 使用默认的浮动布局
        JPanel panel01 = new JPanel();
        panel01.add(new JLabel("用户名"));
        JTextField username = new JTextField(10);
        panel01.add(username);

        // 第 2 个 JPanel, 使用默认的浮动布局
        JPanel panel02 = new JPanel();
        panel02.add(new JLabel("密  码"));
        panel02.add(new JPasswordField(10));

        // 第 3 个 JPanel, 使用浮动布局, 并且容器内组件居中显示
        JPanel panel03 = new JPanel(new FlowLayout(FlowLayout.CENTER));
        JButton loginButton = new JButton("登录");
        panel03.add(loginButton);
        panel03.add(new JButton("注册"));

        loginButton.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println("username=" + username.getText());
            }

        });

        Box vBox = Box.createVerticalBox();
        vBox.add(panel01);
        vBox.add(panel02);
        vBox.add(panel03);

        jf.setContentPane(vBox);
        jf.setSize(400, 200);
        jf.pack();
        jf.setLocationRelativeTo(null);
        jf.setVisible(true);

    }
}