suijishu.java

随机播放的简单实现

package byy;

import java.util.Random;

public class Suijishu {

	public static int[] random_serial(int limit, int need) {
		int[] temp = new int[limit];
		int[] result = new int[need];
		for (int i = 0; i < limit; i++)
			temp[i] = i;
		int w;
		Random rand = new Random();
		for (int i = 0; i < need; i++) {
			w = rand.nextInt(limit - i) + i;
			int t = temp[i];
			temp[i] = temp[w];
			temp[w] = t;
			result[i] = temp[i];
		}
		return result;
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		for (int j = 1; j < 5; j++) {
			System.out.println("第" + j + "组：");
			int[] shuiji = random_serial(10, 10);
			for (int i = 0; i < shuiji.length; i++)
				System.out.print(shuiji[i] + 1);
			System.out.println("");
		}
	}
}