bag.java

用java编写的小游戏 支持多用户 支持网络

package srabblet;

import java.util.Random;

public class Bag {
	private Random rand;

	private int letter_counts[] = { 2, 9, 2, 2, 4, 12, 2, 3, 2, 9, 1, 1, 4, 2,
			6, 8, 2, 1, 6, 4, 6, 4, 2, 2, 1, 2, 1 };

	private int letter_points[] = { 0, 1, 3, 3, 2, 1, 4, 2, 4, 1, 8, 5, 1, 3,
			1, 1, 3, 10, 1, 1, 1, 1, 4, 4, 8, 4, 10 };

	private Letter letters[] = new Letter[100];

	private int n = 0;

	Bag(int seed) {
		rand = new Random(seed);
		for (int i = 0; i < letter_counts.length; i++) {
			for (int j = 0; j < letter_counts[i]; j++) {
				Letter l = new Letter(i == 0 ? '*' : (char) ('A' + i - 1),
						letter_points[i]);
				putBack(l);
			}
		}
	}

	public synchronized Letter takeOut() {
		if (n == 0)
			return null;
		int i = (int) (rand.nextDouble() * n);
		Letter l = letters[i];
		if (i != n - 1)
			System.arraycopy(letters, i + 1, letters, i, n - i - 1);
		n--;
		return l;
	}

	private synchronized void putBack(Letter l) {
		letters[n++] = l;
	}

}