How do I link a class into another class?

[ekay90]

I'm using Eclipse. I have a tab for Class1 and a separate tab for Class2.

In Class1, I want to say something like, "if (num != 2), then implement the code in Class2"

How do I do this?

Thank you.

[Norm]

implement the code in Class2

By implement I assume you mean you want to execute a method in Class2.
The way to execute code in another class is to get a reference to an instance of the class and use it:

refToClass2.methodInClass2();  // call a method in Class2

One way to get a reference to another class use the new statement:

  Class2 refToClass2 = new Class2(<The args here>);

[ekay90]

 Class2 refToClass2 = new Class2(<The args here>);

Regarding this code, what is the refToClass2? What is an example of a reference to Class 2?

[DarrylBurke]

Regarding this code, what is the refToClass2? What is an example of a reference to Class 2?

That is. ^^

db

[ekay90]

So in that case, refToClass2 is just like the variable name?

[Norm]

refToClass2 is just like the variable name?

refToClass2 is the variable name.

[Russd772]

i dont want to hijack this thread but i actually have a question about the answer given,

i thought in the example Class2 refToClass2 = new Class2 , this creats a Class2 object right? so refToClass2 is an object name? or is it still considered a variable that refrences the object?

once again sorry i kinda hijacked the thread with my own question

Russ

[Fubarable]

refToClass2 is a Class2 variable that after refers to a Class2 object after the constructor call. You could assign it to null on the next line, and it is still a Class2 variable, but just one that does not refer to any object.

[Russd772]

thank you for the clarification, i was confused about that after i read the post. once again sorry for posting this on someone elses thread.

Russ