gk

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;

import javax.swing.JPanel;
import javax.swing.JFrame;

import java.util.Random;

public class Geometri extends JPanel {

  public void paintComponent(Graphics g) {
      super.paintComponent(g);

      Graphics2D g2d = (Graphics2D) g;

      g2d.setColor(Color.blue);

      Dimension size = getSize();
      Insets insets = getInsets();

      int w =  size.width - insets.left - insets.right;
      int h =  size.height - insets.top - insets.bottom;

      //menggambar garis
      g2d.drawLine(0,130,170,130);

      //menggambar rectangle outline
      g2d.drawRect(0,0,50,50);

      //menggambar rectangle fill
      g2d.fillRect(60,0,50,50);

      //mengubah warna
      g2d.setColor(Color.red);

      //menggambar oval outline
      g2d.drawOval(0,60,50,50);

      //menggambar oval fill
      g2d.fillOval(60,60,50,50);

  }

  public static void main(String[] args) {

      JFrame frame = new JFrame("Geometri");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.add(new Geometri());
      frame.setSize(250, 200);
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
  }
}