Thread_Kelas ShapePanel

package Graphics;

import java.awt.*;
import java.awt.event.*;
import java.awt.font.*;
import java.awt.geom.*;
import javax.swing.*;


public class ShapePanel extends JPanel {

    public ShapePanel(){


        setBackground(Color.white);
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.setColor(Color.BLUE);
        g.drawLine(0,10,50,60);

        g.setColor(Color.red);
        g.drawRect(50,10,50,50);

        g.setColor(new Color(255,0,0));
        g.fillOval(100,10,50,50);

        g.setColor(new Color(0,255,0));
        g.fillArc(150,10,50,50,0,180);

        Graphics2D g2 =(Graphics2D)g;
        // fill RoundRectangle2D.Double
        GradientPaint redtowhite = new GradientPaint(200,10,Color.red,250, 10,Color.black);
        g2.setPaint(redtowhite);
        g2.fill(new RoundRectangle2D.Double(200, 10, 50,50, 10, 10));
        //g2.setPaint();
        g2.drawString("Filled RoundRectangle2D", 200, 80);

    }

    public static void main(String args[]){
        JFrame frame = new JFrame( "Grafik 2 Dimensi" );
        frame.addWindowListener( new WindowAdapter(){
            public void windowClosing( WindowEvent e ){
                System.exit( 0 );
            }
        });

        frame.setLayout(new BorderLayout());
        ShapePanel shapePanel = new ShapePanel();
        frame.add(shapePanel,BorderLayout.CENTER);

        frame.setSize( 450, 250 );
        frame.setVisible(true);
    }
}