Passing Primitive Variables : Parameter « Java Source And Data Type « SCJP

class ReferenceTest {
  public static void main (String [] args) {
    int a = 1;
    ReferenceTest rt = new ReferenceTest();
    System.out.println("Before modify() a = " + a);
    System.out.println("After modify() a = " + a);
  void modify(int number) {
    number = number + 1;
    System.out.println("number = " + number);

1.25.1.A method's parameter list is a comma-separated list of parameter declarations.
1.25.2.A parameter may be declared as final so that it may be accessed from within a local inner class.
1.25.3.When a primitive value is passed to a method, a copy of the value is made
1.25.4.When an object is passed to a method, a copy of the object reference but not the object itself is made
1.25.5.When an value argument is passed into a method, changes to the argument value in the method do not affect the original.
1.25.6.Create a Reference to a Primitive
1.25.7.Changing the object reference in a method
1.25.8.Calling method operates on an object via the reference value
1.25.9.Passing Object Reference Variables
1.25.10.Passing Primitive Variables