ok...here's the code, and the error says:
cannot find symbol class IntClass

Code:

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

public class ex
{
static Scanner console = new Scanner(System.in);

public static void main (String[] args)
{
int first, third;
IntClass second, fourth;

first = 3;
second = new IntClass(4);
third = 6;
fourth = new IntClass(7);

System.out.println(first + " " + second.getNum() + " " + third + " " + fourth.getNum());
getData(first, second, third, fourth);
System.out.println(first + " " + second.getNum() + " " + third + " " + fourth.getNum());
fourth.setNum(first * second.getNum() + third + fourth.getNum());
getData(third, fourth, first, second);
System.out.println(first + " " + second.getNum() + " " + third + " " + fourth.getNum());
}

public static void getData(int a, IntClass b, int c, IntClass d)
{
a = console.nextInt();
b.setNum(console.nextInt());
c = console.nextInt();
d.setNum(console.nextInt());

b.setNum(a * b.getNum() - c);
d.setNum(b.getNum() + d.getNum());
}
}