Membuat Object Dengan Java NetBeans [Bintang]

Java NetBeans

1. Buatlah project baru ,misal : Latihan
2. Buatlah 2 Java Class ( beri nama Canvas.class dan MainPanel.class ) .

Selanjutnya copy source code dibawah ini ,kemudian paste-kan di dalam Canvas.class -nya .

package Latihan;
import java.awt.geom.GeneralPath;
import javax.swing.JFrame;
/**
 * @author RIFQI
 **/
public class Canvas {
    /**
     * @param args the command line arguments
     **/
    public static void main(String[] args) {
        // TODO code application logic here
        JFrame frame = new JFrame();
        frame.setTitle("Belajar Object Java :");
        frame.setLocationRelativeTo(frame);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        MainPanel panel = new MainPanel();
        frame.getContentPane().add(panel);
        frame.pack();
        frame.setVisible(true);
        GeneralPath p = new GeneralPath(GeneralPath.WIND_NON_ZERO);
        p.moveTo(100. f, 0);
    }
}
	

Langkah selanjutnya copy source code dibawah ini ,dan paste-kan di dalam MainPanel.class -nya .

package Latihan;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JPanel;
/**
 *
 * @author RIFQI
 **/
public class MainPanel extends JPanel {
    public MainPanel() {
        this.setPreferredSize(new Dimension(400, 400));
        this.setBackground(Color.WHITE);
    }
    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D) g;
        //Segitiga 1
        int[] x1 = {
            240,
            300,
            360
        };
        int[] y1 = {
            200,
            20,
            200
        };
        g.setColor(new Color(255, 242, 0));
        g.fillPolygon(x1, y1, 3);
        //Segitiga 2
        int[] x2 = {
            30,
            300,
            570
        };
        int[] y2 = {
            200,
            390,
            200
        };
        g.setColor(new Color(255, 242, 0));
        g.fillPolygon(x2, y2, 3);
        //Segitiga 3
        int[] x3 = {
            130,
            190,
            300
        };
        int[] y3 = {
            490,
            310,
            390
        };
        g.setColor(new Color(255, 242, 0));
        g.fillPolygon(x3, y3, 3);
        //Segitiga 4
        int[] x4 = {
            300,
            410,
            470
        };
        int[] y4 = {
            390,
            310,
            490
        };
        g.setColor(new Color(255, 242, 0));
        g.fillPolygon(x4, y4, 3);
    }
}
    

Selesai.
Selanjutnya tinggal di running aja . Misal dengan SHIFT + F6

Good Luck,Der...!!

Happy Code,ya...... :)