About Question enthuware.ocajp.i.v8.2.957 :

[Javier]

Hi Paul!

Why is not compiling this method?

public static void changeIt(int a){
a+2;
}
and this neither?

public static void changeIt(int a){
int f=4;
a+f;
}
I think that something very basic I am missing but I don´t know exactly what...
Thank you very much Paul.

[admin]

As per section 14.8 of JLS the only expression statements that are valid in Java language are:
Assignment
PreIncrementExpression
PreDecrementExpression
PostIncrementExpression
PostDecrementExpression
MethodInvocation
ClassInstanceCreationExpression

a+2; or a+f; are, therefore, not valid although a = a+2; or a = a+f; are valid because they are valid assignments.

HTH,
Paul.

[Javier]

and why is not possible to store the value of the method:

changeIt(someInt);// like int t= changeIt(someInt);

is it not possible because changeIt is void method???

Thank you so much Paul for the quick answer to my last question!!

[admin]

and why is not possible to store the value of the method:

changeIt(someInt);// like int t= changeIt(someInt);

is it not possible because changeIt is void method???

That is correct. Since changeIt doesn't return anything, you can't assign its value to int t.