Please help me😢.I am in trouble of the java program about "Random" and "boolean" and "Array"

Question

import java.util.Random;
public class Test {

public static void main(String[] args) {

int[] nums = new int[10];

boolean []a=new boolean[n];

Random ran = new Random();

for(int i=0;i<10;i++){
nums[i] = ran.nextInt(10);
do{
a[nums[i]];
} while(a[nums[i]]);

a[nums[i]]=true;
System.out.println(nums[i]);

}
}
}

Answer 1

::loop is not seen meaningful (purpose)::
the variable n is not declared

Answer 2

Start with save your code in "Code Playground" section and post here his link

Answer 3

Thank you!