Belajar Logika dan Pemrograman

import java.util.Scanner;

public class prima
{
public static void main (String[] args) {
int upperLimit;
int lowerLimit;
int gedean=0;
int x=0;
Scanner input;
input = new Scanner(System.in);
int counter=0;

System.out.print("Upper Limit = ");
upperLimit = input.nextInt();

System.out.print("Lower Limit = ");
lowerLimit = input.nextInt();

// System.out.println("Prima antara"+lowerLimit+"dan"+upperLimit+"adalah = ");
for(int i=lowerLimit;i<=upperLimit;i++)
{
int factorCounter=0;
for(int j=1;j<=i;j++)
{
if(i%j==0){
factorCounter++;
}
}
if(factorCounter==2)
{
counter++;
//System.out.print(i+" ");
x = i;
}

}
System.out.println("Jumlah Bilangan Prima = "+(counter-1));
System.out.println("Bilangan terbesar adalah = "+x);
if(counter==0)
System.out.println("Tidak ada");
}
}