Question

java怎么让背景图片不覆盖界面？

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.GridLayout;
public class Ci extends JFrame implements ActionListener{
protected JPanel a;
protected JLabel si;
protected JLabel qing;
protected JTextField wen;
protected JButton q;
protected String ll;
Ci(){
this.setBounds(100,100,420,320);
a=new JPanel();
si=new JLabel("i");
qing=new JLabel("请输入关键字");
wen=new JTextField(10);
q=new JButton("确定");
q.addActionListener(this);;
a.add(si);
a.add(qing);
a.add(wen);
a.add(q);
kk();
a.setLayout(new GridLayout(10,5));
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.add(a);
this.setVisible(true);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==q){
if(wen.getText().equals(ll)){
this.setTitle("正确");
this.wen.setText("");
kk();
}else{
JOptionPane.showMessageDialog(this,"错误");
}
}
}
public static void main(String[]args){
new Ci();
}
private void kk(){
String aa[]={"是","否","公共的","私有的","受保护的"};
String bb[]={"yes","no","public","private","protected"};
int cc=(int)(Math.random()*aa.length);
String c=aa[cc];
si.setText(c);
this.ll=bb[cc];
JPanel panel = new JPanel(){
protected void paintComponent(Graphics g){
super.paintComponent(g);
Image image = new ImageIcon("D:/tuan/5830.jpg").getImage();
int width = Tupian.getFrames()[0].getWidth();
int heigh = Tupian.getFrames()[0].getHeight();
g.drawImage(image, 0, 0, width, heigh, null);
}
};
add(panel);
setBounds(500, 100, 480, 320);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
}
程序已运行就把里面的内容覆盖了，怎么让他不覆盖？

Answer 1

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Ci extends JFrame implements ActionListener {
	protected JPanel a;
	protected JLabel si;
	protected JLabel qing;
	protected JTextField wen;
	protected JButton q;
	protected String ll;

	Ci() {
		this.setBounds(100, 100, 420, 320);
		a = new JPanel();
		si = new JLabel("i");
		qing = new JLabel("请输入关键字");
		wen = new JTextField(10);
		q = new JButton("确定");
		q.addActionListener(this);;
		a.add(si);
		a.add(qing);
		a.add(wen);
		a.add(q);
		kk();
		a.setLayout(new GridLayout(10, 5));
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.add(a);
		this.setVisible(true);
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		if(e.getSource() == q) {
			if(wen.getText().equals(ll)) {
				this.setTitle("正确");
				this.wen.setText("");
				kk();
			}
			else {
				JOptionPane.showMessageDialog(this, "错误");
			}
		}
	}

	public static void main(String[] args) {
		new Ci();
	}

	private void kk() {
		String aa[] = {"是", "否", "公共的", "私有的", "受保护的"};
		String bb[] = {"yes", "no", "public", "private", "protected"};
		int cc = (int) (Math.random() * aa.length);
		String c = aa[cc];
		si.setText(c);
		this.ll = bb[cc];
		JPanel panel = new JPanel() {
			@Override
			protected void paintComponent(Graphics g) {
				super.paintComponent(g);
				Image image = new ImageIcon("D:/tuan/5830.jpg").getImage();
				int width = Ci.getFrames()[0].getWidth();
				int heigh = Ci.getFrames()[0].getHeight();
				g.drawImage(image, 0, 0, width, heigh, null);
			}
		};
		panel.setOpaque(false);//设置为透明
		add(panel);
		// setBounds(500, 100, 480, 320);
		// setVisible(true);
		// setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
}