import javax.swing.*;
import java.awt.*;
public class MY extends JFrame{
    JLabel jl1;   
    public MY(){
        super("A");
        
        jl1=new JLabel("欢迎");
        jl1.setBounds(60,60,60,60);
        Container ct=this.getContentPane();        
        ct.setLayout(null);
        ct.add(jl1);
        ct.setSize(300,150);
        ct.setVisible(true);
    }

    public static void main(String args[]){
        MY my=new MY();   
    }
   
}