Why doesn't this code work?

Question

/* This code aims to tell is a given integer is a prime or a composite number */

import java.util.Scanner;

class myClass
{
public static void main(String args[])
{
System.out.println("Tell me a number");
Scanner number = new Scanner(System.in);
int num = number.nextInt();
int i;
for(i=1; i==num; i++)
{
int resto = num % i;
if (resto != 1 || resto != num)
{
System.out.println("This is a prime number!");
}
else
{
System.out.println("This is a composite number!");
}
}
}
}

Answer 1

A logic error ?
inside for condition. Use i < num. And start from 2
and a condition for if simply "if num%i==0 then its not prime"