WAP in java to decide whether the two number is twin prime or not

import java.util.*;
class loop11{
public static void main(String args[])
{
int c1=0,c2=0,n1,n2,i,d;
Scanner ob=new Scanner(System.in);
System.out.println("enter two nos:");
n1=ob.nextInt();
n2=ob.nextInt();
for(i=1;i<=n1;i++)
{
if(n1%i==0)
{
c1++;
}
}
for(i=1;i<=n2;i++)
{
if(n2%i==0)
{
c2++;
}
}
d=Math.abs(n1-n2);
if(c1==2 && c2==2 && d==2)
System.out.println("twin prime");
else 
System.out.println("not twin prime");
}
}

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