What is the meaning of the error with random in my java code?

import java.io.*;
import java.util.*;

class Random{

public static void main(String[] args){

    Random obj = new Random();

    int n=10,sum=0,rand;

    for(int i=0; i<n; i++){
        rand = obj.nextInt(10) + 1;
        sum += rand;
        System.out.println("The number is: "+ rand);
        System.out.print("Start Pattern: ");
        for(int j=0; j<rand; j++)
            System.out.print("*");
    }
    System.out.println("\n Sum is : "+sum);
    System.out.println("Average is: "+(sum/n));
    }
}

Shows error: cannot find symbol. I think my code is correct but don't know why it is showing this error.