Field Variables are variables that are declared as members of classes. : Member Variable « Java Source And Data Type « SCJP

1. SCJP
2. Java Source And Data Type
3. Member Variable

A member variable is created when a class instance is created, 
and it is destroyed when the object is destroyed. 

public class MainClass {
  private int fieldVariable;

  public static void main(String[] argv) {
    System.out.println();
  }
}