Java产生不重复随机数方法
public class TestRand3 {
??? static int n = 20;
??? static Random rand = new Random();
??? static boolean[] bool = new boolean[n];
??? public static void main(String[] args) {
??????? for (int j=0; j<n; j++) {
??????????? int r = proRandom();
??????????? System.out.print(r + " ");
??????? }
??? }
??? public static int proRandom() {
??????? int num =0;
??????? for (int i = 0; i<n; i++){
??????????? do{
????????????????num = rand.nextInt(n);?? //如果产生的数相同继续循环
??????????? }while(bool[num]);
??????????? bool[num] =true;
??????????? return num;
??????? }
??????? return n+1;
??? }
}
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