import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class TriangleMethod extends JFrame
    implements ActionListener {

    private JButton button;
    private JPanel panel;

    public static void main(String[] args) {
        TriangleMethod frame = new TriangleMethod();
        frame.setSize(350, 300);
        frame.createGUI();
        frame.show();
    }

    private void createGUI() {
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        Container window = getContentPane();
        window.setLayout(new FlowLayout() );

        panel = new JPanel();
        panel.setPreferredSize(new Dimension(300, 200));
        panel.setBackground(Color.white);
        window.add(panel);

        button = new JButton("Press me");
        window.add(button);
        button.addActionListener(this);
    }

    public void actionPerformed(ActionEvent event) {
        Graphics paper = panel.getGraphics();
        drawLogo(paper, 10, 20);
        drawLogo(paper, 100, 100);
        drawTriangle(paper, 100, 10, 40, 40);
        drawTriangle(paper, 10, 100, 20, 60);
    }

    private void drawLogo(Graphics drawingArea, 
                          int xPos, int yPos) {
        drawingArea.drawRect(xPos, yPos, 60, 60);
        drawingArea.drawRect(xPos, yPos, 40, 40);
        drawingArea.drawRect(xPos, yPos, 20, 20);
    }

    private void drawTriangle(Graphics drawingArea,
                              int xPlace, 
                              int yPlace, 
                              int width,
                              int height) {
        drawingArea.drawLine(xPlace, yPlace,
            xPlace, yPlace + height);
        drawingArea.drawLine(xPlace, yPlace + height,
            xPlace + width, yPlace + height);
        drawingArea.drawLine(xPlace, yPlace, 
            xPlace + width, yPlace + height);
    }
}