代码如下:
import javax.swing.*;
import java.awt.*;
import java.awt.image.*;public class Pic extends JFrame
{
private JButton
b1 = new JButton("button1"),
b2 = new JButton("button2"),
b3 = new JButton("button3"),
b4 = new JButton("button4"),
b6 = new JButton("button6"),
b5 = new JButton("button5");
private Panel panel1 = new Panel();
private JPanel panel2 = new JPanel();
public Pic()
{
this.setTitle("图像处理");
this.setSize(900, 700);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel1.img = Toolkit.getDefaultToolkit().getImage(Panel.class.getResource("meishi.jpg"));
panel2.add(b1);
panel2.add(b2);
panel2.add(b3);
panel2.add(b4);
panel2.add(b5);
panel2.add(b6);
panel1.repaint();
panel1.setBackground(Color.darkGray);
panel2.setBackground(Color.CYAN);
this.add(panel1,BorderLayout.CENTER);
this.add(panel2,BorderLayout.SOUTH);
}
public static void main(String[] args)
{
Pic pic = new Pic();
}
}class Panel extends JPanel
{
Image img = null;
public void paint(Graphics g)
{
super.paint(g);
g.drawImage(img,0,0,300,200,this);
}
}
import javax.swing.*;
import java.awt.*;
import java.awt.image.*;public class Pic extends JFrame
{
private JButton
b1 = new JButton("button1"),
b2 = new JButton("button2"),
b3 = new JButton("button3"),
b4 = new JButton("button4"),
b6 = new JButton("button6"),
b5 = new JButton("button5");
private Panel panel1 = new Panel();
private JPanel panel2 = new JPanel();
public Pic()
{
this.setTitle("图像处理");
this.setSize(900, 700);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel1.img = Toolkit.getDefaultToolkit().getImage(Panel.class.getResource("meishi.jpg"));
panel2.add(b1);
panel2.add(b2);
panel2.add(b3);
panel2.add(b4);
panel2.add(b5);
panel2.add(b6);
panel1.repaint();
panel1.setBackground(Color.darkGray);
panel2.setBackground(Color.CYAN);
this.add(panel1,BorderLayout.CENTER);
this.add(panel2,BorderLayout.SOUTH);
}
public static void main(String[] args)
{
Pic pic = new Pic();
}
}class Panel extends JPanel
{
Image img = null;
public void paint(Graphics g)
{
super.paint(g);
g.drawImage(img,0,0,300,200,this);
}
}
或者panel1.img = ImageIO.read(new File("meishi.jpg"));(这个会抛出异常)
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;public class Pic extends JFrame {
private JButton b1 = new JButton("button1"), b2 = new JButton("button2"),
b3 = new JButton("button3"), b4 = new JButton("button4"),
b6 = new JButton("button6"), b5 = new JButton("button5");
private Panel panel1 = new Panel();
private JPanel panel2 = new JPanel(); public Pic() {
this.setTitle("图像处理");
this.setSize(900, 700);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); panel1.img = Toolkit.getDefaultToolkit().getImage(
Panel.class.getResource("meishi.jpg"));
panel2.add(b1);
panel2.add(b2);
panel2.add(b3);
panel2.add(b4);
panel2.add(b5);
panel2.add(b6);
panel1.setBackground(Color.darkGray);
panel2.setBackground(Color.CYAN);
this.setLayout(new BorderLayout());
this.add(panel1, BorderLayout.CENTER);
this.add(panel2, BorderLayout.SOUTH); } public static void main(String[] args) {
Pic pic = new Pic();
pic.panel1.repaint();
}
}class Panel extends JPanel {
Image img = null; @Override
public void paint(Graphics g) {
super.paint(g);
g.drawImage(img, 0, 0, this.getWidth(), this.getHeight(), this);
}
}
图片放在此类生成的class文件夹下
不要使用和java.awt.Panel 同名的 Panel类名。
不要使用和java.awt.Panel 同名的 Panel类名
EventQueue.invokeLater(new Runnable(){
public void run() {
Pic pic = new Pic();
}
});
这样