帮我用java写一个俄罗斯方块游戏

好的，我可以为您提供一个 Java 实现的俄罗斯方块游戏的示例代码：

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.util.ArrayList;
import javax.swing.JFrame;

public class Tetris extends JFrame {
  private final int WIDTH = 10;
  private final int HEIGHT = 20;
  private final int BLOCK_SIZE = 30;

  private ArrayList<Block> blocks = new ArrayList<Block>();

  public Tetris() {
    setSize(WIDTH * BLOCK_SIZE + 15, HEIGHT * BLOCK_SIZE + 40);
    setTitle("俄罗斯方块游戏");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setVisible(true);
  }

  public void paint(Graphics g) {
    g.fillRect(0, 0, WIDTH * BLOCK_SIZE + 15, HEIGHT * BLOCK_SIZE + 40);
    for (int x = 0; x < WIDTH; x++) {
      for (int y = 0; y < HEIGHT; y++) {
        g.setColor(Color.GRAY);
        g.drawRect(x * BLOCK_SIZE + 10, y * BLOCK_SIZE + 10, BLOCK_SIZE, BLOCK_SIZE);
      }
    }

    for (Block block : blocks) {
      block.draw(g, BLOCK_SIZE);
    }
  }

  public static void main(String[] args) {
    new Tetris();
  }

  private class Block {
    ArrayList<Point> points = new ArrayList<Point>();

    public void draw(Graphics g, int blockSize) {
      for (Point point : points) {
        g.setColor(Color.RED);
        g.fillRect(point.x * blockSize + 10, point.y * blockSize + 10, blockSize, blockSize);
      }
    }
  }
}

这是一个简单的 Java 代码实现，可以作为您开发俄罗斯方块游戏的起点。你可以根据需要进行修改和扩展。