opg 5

import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;

public class FractalTree extends JFrame {
	private static final long serialVersionUID = 1L;

	public FractalTree() {
		setBounds(100, 100, 800, 600);
		setResizable(false);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}

	private void drawTree(Graphics g, int x1, int y1, double angle, int depth) {
		if (depth == 0)
			return;
		int x2 = x1 + (int) (Math.cos(Math.toRadians(angle)) * depth * 10.0);
		int y2 = y1 + (int) (Math.sin(Math.toRadians(angle)) * depth * 10.0);
		g.drawLine(x1, y1, x2, y2);
		drawTree(g, x2, y2, angle - 30, depth - 1);
		drawTree(g, x2, y2, angle + 30, depth - 1);
	}

	@Override
	public void paint(Graphics g) {
		g.setColor(Color.BLACK);
		drawTree(g, 400, 500, -90, 9);
	}

	public static void main(String[] args) {
		new FractalTree().setVisible(true);
	}
}