[SOLVED] Display longest string on screen

Code java:

// Practical 1B - Question 2
// Marcus Ward
// 27/01/2012
// Program asking user for two strings, and then it will display the longest string on screen.
 
import java.util.Scanner;
 
public class LongestString
{ 
     public static void main(String[] args)
	  {
     Scanner keyboardIn = new Scanner(System.in);
 
	  String one = new String(); // declare variables
	  String two = new String();
	  int num1, num2;
 
	  System.out.print("Please enter the first string: ");
	  one = keyboardIn.nextLine();
 
	  System.out.print("Please enter the second string: ");
	  two = keyboardIn.nextLine();
 
	  num1.length();
	  num2.length();
 
	  if(num1>num2)
	  {
	  System.out.println(one + " is the longest string.");
	  }
	  else 
	  {
	  System.out.println(two + " is the longest string.");
	  }
	  }
}

2 Error Messages:

LongestString.java:24: int cannot be dereferenced
num1.length();
^
LongestString.java:25: int cannot be dereferenced
num2.length();
^