产生不相同的随机数（低效率版）

//本程序目的还是生成不相同的随机数，是一种执行效率及低的算法，不过n很大时程序还是可以用的！public class NoSameRandom3 {private static int n = 10;private int a[] = new int[n];private boolean flag = false;public void csp(int n) {flag = true;t: {for (int i = 0; i < n; i++) {a[i] = (int) (Math.random() * 10);for (int j = 0; j < i; j++) {if (a[i] == a[j]) {flag = false;break t;}}}}if (flag == false) {NoSameRandom3 nsr = new NoSameRandom3();nsr.csp(n);}if (flag == true) {print();}}public void print() {for (int i = 0; i < n; i++) {System.out.print(" " + a[i]);}}// 测试入口public static void main(String args[]) {NoSameRandom3 nsr = new NoSameRandom3();nsr.csp(n);}}