要使用Java编写俄罗斯方块游戏，可以使用Java图形库（如AWT或JavaFX）来创建游戏界面和图形。下面是一个简单的示例代码以帮助你入门：
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.KeyEvent;import java.awt.event.KeyListener;import java.util.ArrayList;import java.util.List;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.Timer;public class Tetris extends JPanel implements ActionListener, KeyListener {private static final int WIDTH = 10;private static final int HEIGHT = 20;private static final int SQUARE_SIZE = 30;private static final int DELAY = 300;private Timer timer;private boolean isFallingFinished = false;private boolean isStarted = false;private boolean isPaused = false;private int score = 0;private int currentX = 0;private int currentY = 0;private List<int[][]> tetrominoes = new ArrayList<>();private int[][] board = new int[WIDTH][HEIGHT];public Tetris() {setPreferredSize(new Dimension(WIDTH * SQUARE_SIZE, HEIGHT * SQUARE_SIZE));setBackground(Color.BLACK);setFocusable(true);addKeyListener(this);initializeTetrominoes();}private void initializeTetrominoes() {tetrominoes.add(new int[][] { { 1, 1, 1, 1 } }); // I shapetetrominoes.add(new int[][] { { 1, 1, 0 }, { 0, 1, 1 } }); // Z shapetetrominoes.add(new int[][] { { 0, 1, 1 }, { 1, 1, 0 } }); // S shapetetrominoes.add(new int[][] { { 1, 1, 1 }, { 0, 0, 1 } }); // J shapetetrominoes.add(new int[][] { { 1, 1, 1 }, { 1, 0, 0 } }); // L shapetetrominoes.add(new int[][] { { 0, 1, 0 }, { 1, 1, 1 } }); // T shapetetrominoes.add(new int[][] { { 1, 1 }, { 1, 1 } }); // O shape}private void start() {isStarted = true;isPaused = false;score = 0;clearBoard();newPiece();timer = new Timer(DELAY, this);timer.start();}private void pause() {if (!isStarted) {return;}isPaused = !isPaused;if (isPaused) {timer.stop();} else {timer.start();}repaint();}@Overridepublic void paintComponent(Graphics g) {super.paintComponent(g);drawBoard(g);drawPiece(g);}private void drawBoard(Graphics g) {for (int i = 0; i < WIDTH; i++) {for (int j = 0; j < HEIGHT; j++) {if (board[i][j] != 0) {g.setColor(Color.CYAN);g.fillRect(i * SQUARE_SIZE, j * SQUARE_SIZE, SQUARE_SIZE, SQUARE_SIZE);}}}}private void drawPiece(Graphics g) {g.setColor(Color.YELLOW);for (int i = 0; i < 4; i++) {for (int j = 0; j < 4; j++) {if (tetrominoes.get(0)[i][j] != 0) {g.fillRect((currentX + i) * SQUARE_SIZE, (currentY + j) * SQUARE_SIZE, SQUARE_SIZE, SQUARE_SIZE);}}}}private void newPiece() {int randomIndex = (int) (Math.random() * tetrominoes.size());currentX = WIDTH / 2;currentY = 0;if (!isMoveValid(tetrominoes.get(randomIndex), currentX, currentY)) {isStarted = false;timer.stop();}}private boolean isMoveValid(int[][] shape, int newX, int newY) {for (int i = 0; i < 4; i++) {for (int j = 0; j < 4; j++) {int x =