java中JFrame去掉边框设置背景

来源：互联网发布：c语言书籍排行编辑：程序博客网时间：2024/05/15 13:25

在这里主要通过继承JPanel来定义一个backgoundPanel类，将其添加到JFrame中，来给他设置背景，这样做的好处是我们还可以在上面继续添加其他组件，如下（BackgruondPanel）：

public class BackgruondPanel extends JPanel{private ImageIcon pic;private Image image;private int width;private int height;public BackgruondPanel(String imgUrl) {pic = new ImageIcon(imgUrl);image = pic.getImage();width = pic.getIconWidth();height = pic.getIconHeight();this.setSize(width, height);}@Overridepublic void paint(Graphics arg0) {super.paint(arg0);arg0.drawImage(image, 0, 0, width, height,null);}//获取作为背景图片的宽度public int getdefaultWidth(){return width;}//获取作为背景图片的高度public int getdefaultHeight(){return height;}}

main类：

public class Main {public static void main(String[] args) {initView();}public static void initView(){String url = "img\\main_background.gif";JFrame frame = new JFrame();BackgruondPanel bgpanel = new BackgruondPanel(url);frame.add(bgpanel);frame.setBounds(30, 30, bgpanel.getdefaultWidth(), bgpanel.getdefaultHeight());//设置去掉边框frame.setUndecorated(true);frame.setVisible(true);  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  }}

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