import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Random;
import java.util.Set;

public class Test {
public static void main(String[] args){
ArrayList arr = new Test().getRandom(10);
Iterator it = arr.iterator();
while(it.hasNext()){
System.out.println(it.next());
}
}
public ArrayList getRandom(int num){
ArrayList randomNum = new ArrayList();
Random random = new Random();
int temp = 0;
for (int i = 0;i < num; i ++){
temp = random.nextInt(num);
int nums = temp + 1;
if (randomNum.indexOf(new Integer(nums)) == -1){
randomNum.add(new Integer(nums));
}else{
i -- ;
}
}
return randomNum;
}
}