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for (int i = 0; i < 4; ++i) {
result.setX(i, y(i));
result.setY(i, -x(i));
}
return result;
}

public Shape rotateRight()
{
if (pieceShape == Tetrominoes.SquareShape)
return this;

Shape result = new Shape();
result.pieceShape = pieceShape;

for (int i = 0; i < 4; ++i) {
result.setX(i, -y(i));
result.setY(i, x(i));
}
return result;
}
}

STEP3. 블록이 떨어지는 속도조절 지금까지 제거한 행 수를 계산하고 게임의 논리를 정의한 클래스,
Board.class
package tetris;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;

import tetris.Shape.Tetrominoes;

public class Board extends JPanel implements ActionListener {

final int BoardWidth = 10;

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