import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.GeneralPath;

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

public class FreieFormZeichnen {
    
    JPanel panel;
    
    public FreieFormZeichnen(){
        init();
    }
    
    private void init() {
        JFrame frame = new JFrame("Freiform zeichnen");
        panel = new FreiFormPanel();
        frame.add(panel);
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new FreieFormZeichnen());
    }
}

class FreiFormPanel extends JPanel {
    
    public void paintComponent(Graphics g) {
        Graphics2D g2d = (Graphics2D) g;
        g2d.setColor(Color.WHITE);
        g2d.fillRect(0, 0, this.getWidth(), this.getHeight());
        g2d.setColor(Color.BLACK);
        
        GeneralPath gp = new GeneralPath();
        
        gp.moveTo(100, 110);    // Vorderbein vorne oben
        gp.lineTo(100, 200);
        gp.lineTo(110, 200);
        gp.lineTo(110, 115);
        gp.quadTo(110, 110, 120, 110);
        gp.lineTo(160, 120);
        gp.lineTo(170, 200);    
        gp.lineTo(180, 200);    
        gp.lineTo(170, 110);        
        gp.quadTo(170, 80, 200, 50);
        gp.quadTo(195, 40, 190, 50);
        gp.quadTo(160, 80, 160, 110);
        gp.quadTo(105, 90, 100, 110);
        
        g2d.draw(gp);
    }
    
    public Dimension getPreferredSize() {
        return new Dimension(300, 300);
    }
}