PaintTest.java

import javax.swing.*;
import java.awt.*;
public class PaintTest extends JFrame{
    public PaintTest(){
        setBounds(0,0,300,300);
        PaintCanvas pc=new PaintCanvas();
        getContentPane().add(pc);
    }
    
    class PaintCanvas extends Canvas{
        public void paint(Graphics g){
            Font f=new Font("Arial",Font.ITALIC|Font.BOLD,25);
            g.setFont(f);
            g.drawString("Selam", 50,50);
            g.drawLine(10,10, 50,50);
            g.setColor(Color.RED);
            g.drawRect(70,70,20,20);
            g.setColor(new Color(34,222,45));
            g.fillRect(100,100,30,30);
            g.drawArc(150,150,20,20,0,360);
            g.setColor(Color.BLUE);
            g.drawArc(250,250,20,20,0,90);
         }
    } 
    public static void main(String[] args){
        new PaintTest().setVisible(true);
    }
}