membuat triangle dengan netbeans

 ini nih source code untuk membuat triangle dengan netbeans..


import java.awt.Polygon;
import java.awt.Shape;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import java.awt.Dimension;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

class TriangleButton extends JButton {
    private Shape triangle = createTriangle();

    @Override
    public void paintBorder( Graphics g ) {
        ((Graphics2D)g).draw(triangle);
    }
    @Override
    public void paintComponent( Graphics g ) {
        ((Graphics2D)g).fill(triangle);
    }
    @Override
    public Dimension getPreferredSize() {
        return new Dimension(200,100);
    }
    @Override
    public boolean contains(int x, int y) {
        return triangle.contains(x, y);
    }

    private Shape createTriangle() {
        Polygon p = new Polygon();
        p.addPoint( 0  , 100 );
        p.addPoint( 100 , 0   );
        p.addPoint( 200 ,100  );
        return p;
    }
}

/**
 *
 * @author umum
 */
public class datar extends javax.swing.JFrame {
 public static void main( String [] args ) {
        JFrame frame = new JFrame();
        final JButton b =  new TriangleButton();
        b.addActionListener( new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                System.out.println("Click!");
            }
        });
        frame.add( new JPanel(){{add(b);}} );
        frame.setVisible(true);

    }
    /** Creates new form datar */
    public datar() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setBackground(new java.awt.Color(0, 255, 204));

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 300, Short.MAX_VALUE)
        );

        pack();
    }// </editor-fold>

    /**
    * @param args the command line arguments
    */
   
    // Variables declaration - do not modify
    // End of variables declaration

}







ini hasil screen shot dari codingan di atas ......