setBackground设置背景色!
布局随便选,下面程序使用了边框(BorderLayout)和流水(FlowLayout)2种布局方式!
顺便帮你加了一个按钮事件!有问题再追问吧!~
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Test extends JFrame implements ActionListener {
private JPanel panel0 = null, panel2 = null;
private JButton b1 = null, b2 = null, b3 = null, b4 = null;
public Test() {
Container c = this.getContentPane();
//边框布局
c.setLayout(new BorderLayout());
//创建panel
panel0 = new JPanel();
panel2 = new JPanel();
//为2个panel设置底色
panel0.setBackground(Color.red);
panel2.setBackground(Color.BLUE);
//2个panel都是用流水布局
panel0.setLayout(new FlowLayout());
panel2.setLayout(new FlowLayout());
//创建按钮
b1 = new JButton("panel2黄色");
b2 = new JButton("panel2绿色");
b3 = new JButton("panel0橙色");
b4 = new JButton("panel0灰色");
/**
* 添加按钮事件
*/
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
/**
* 将按钮添加相应panel上
*/
panel0.add(b1);
panel0.add(new JLabel());
panel0.add(b2);
panel2.add(b3);
panel2.add(b4);
/**
* 将panel添加到容器
*/
c.add(panel0, BorderLayout.CENTER);
c.add(panel2, BorderLayout.EAST);
this.setSize(500, 500);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
}
public static void main(String[] args) {
new Test();
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (e.getSource() == b1) {
panel2.setBackground(Color.yellow);
} else if (e.getSource() == b2) {
panel2.setBackground(Color.green);
} else if (e.getSource() == b3) {
panel0.setBackground(Color.ORANGE);
} else if (e.getSource() == b4) {
panel0.setBackground(Color.GRAY);
}
}
}
先设定Frame 大小 取消默认布局
new 两个Panel()设坐标
Panel布局取消 设置颜色
new 两个BUtton 加到 Panel
Panel 加到 Frame