Swing之JFrame窗体

 

 

 

 

public class JFrameDemo extends  JFrame{
    public  void init() {
        JFrame jf = new JFrame("guoguoguo");
//获得一个容器
        Container container=  jf.getContentPane();
        container.setBackground(Color.red);
        jf.setBounds(200, 200, 400, 500);
        jf.setVisible(true);
        Label label = new Label("hahahahahahahh");
        jf.add(label);
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


    }