The method If(boolean) is undefined

Question

"The method If(boolean) is undefined "
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
     The method If(boolean) is undefined for the type TestCalculator
     Syntax error, insert ";" to complete Statement
I'm having some trouble using conditional statements in my code for some reason. I've recently had a lot of problems with my JRE's in eclipse and I thought I was finally past them. Could this error be related to something like that?
Do I have to make any special declarations at the beginning of my code invoking the boolean method?
Thanks

Answer 1

Thanks for the help. Here's the code...
import java.util.Scanner; // importing the scanner to be able to accept user input
public class BensCalculator { // declaring the public class, make sure it matches the filename
     public static void main(String[] args) { // mandatory command used to cue the program's start
          Scanner scannerObject = new Scanner(System.in);
String operator;
          int firstNumber, secondNumber;
System.out.println("Type two single digit integers separated by spaces and one legal operator.");
firstNumber = scannerObject.nextInt();
If (firstNumber > 10)
System.out.print("Error! --> Please enter an integer between 1 and 9.");
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