Coder Forum

Java Quellcode

@Override
public void paintComponent(final Graphics graphics) {
    final Graphics2D g = (Graphics2D)graphics;
    final GeneralPath path = new GeneralPath();
    //mit dem path den Stern zeichnen -> siehe Doku moveTo()/lineTo()
 
    g.fill(path);
}

Java Quellcode

@SuppressWarnings("serial")
public class MainWindow extends JFrame {
	public static void main(final String... args) {
		new MainWindow();
	}
 
	public MainWindow() {
		super("Flagge");
		SwingUtilities.invokeLater(new Runnable() {
			@Override
			public void run() {
				setupUI();
				pack();
				setLocationRelativeTo(null);
				setVisible(true);
			}
		});
 
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
 
	private void setupUI() {
		add(new FlagComponent(), BorderLayout.CENTER);
	}
}

Java Quellcode

@SuppressWarnings("serial")
public class FlagComponent extends JComponent {
	public FlagComponent() {
		setPreferredSize(new Dimension(400, 300));
	}
 
	@Override
	protected void paintComponent(final Graphics graphics) {
		final Graphics2D g = (Graphics2D)graphics;
 
		final int w = getWidth();
		final int h = getHeight();
 
		g.setColor(Color.BLUE);
		g.fillRect(0, 0, w, h/3);
		g.setColor(Color.GREEN);
		g.fillRect(0, h/3, w, h/3);
		g.setColor(Color.PINK);
		g.fillRect(0, 2*h/3, w, h/3);
 
		final GeneralPath path = new GeneralPath();
		path.moveTo(w/3, h/2);
		path.lineTo(w/3 + 25, h/2 + 25);
		path.lineTo(w/3 - 25, h/2 + 25);
		path.lineTo(w/3, h/2);
 
		g.setColor(Color.RED);
		g.fill(path);
	}
}