import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;

public class BufferStrategyTest1 {

    private static Color[] colors = new Color[] {
        Color.red, Color.blue, Color.green, Color.yellow, Color.cyan, Color.pink, 
        Color.magenta, Color.orange, Color.gray, Color.lightGray, Color.darkGray,
        Color.white, Color.black};

    public BufferStrategyTest1(int bufferSize){
        Frame frame = new Frame("BufferStrategy Test");
        frame.setBounds(200, 200, 400, 400);
        frame.setLayout(null);
        frame.setIgnoreRepaint(true);

        frame.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(0);
            }
        });

        frame.setVisible(true);

        try{
            frame.createBufferStrategy(bufferSize);
            BufferStrategy bufferStrategy = frame.getBufferStrategy();
            while(true){
                for (int i = 0; i < bufferSize; i++) {
                    Graphics g = bufferStrategy.getDrawGraphics();
                    if(!bufferStrategy.contentsLost()){
                        g.setColor(colors[i]);
                        g.fillRect(0, 0, 400, 400);
                        g.setFont(new Font("Helvetica", Font.PLAIN, 64));
                        g.setColor(Color.black);
                        g.drawString("Buffer No." + i, 20, 220);
                        bufferStrategy.show();
                        g.dispose();
                    }
                    try {
                        Thread.sleep((int)1000L);
                    } catch (InterruptedException ex) {}
                }
            }
        }catch (IllegalStateException ex){
            ex.printStackTrace();
        }
    }

    public static void main(String[] args){
        try{
            new BufferStrategyTest1(Integer.parseInt(args[0]));
        }catch(NumberFormatException ex){
            ex.printStackTrace();
        }
    }
}