2015阿里巴巴实习生笔试题-java

随机输出900个大于等于1且小于等于1000的不相等的整数。

import java.util.Random;
public class randomTest {

public static int[] creatRandom(int n){

Random rdm = new Random();
int[] a = new int[900];
int b,i,j;
a[0]=rdm.nextInt(n)+1;
for(i = 1; i < 900; i++){
b=rdm.nextInt(n)+1;
for(j = 0; j < i;){
if(b!=a[j]){
j++;
}
else{
b=rdm.nextInt(n)+1;
j=0;
}
}
if(j==i){
a[i]=b;
}
}
return a;
}
public static void main(String[] args) {
int[] array =creatRandom(1000);
for(int i=0;i<array.length;i++){
System.out.print(array[i]+" ");
}

}

}