How to introduce one class into another through an object in java?

[Charlie A]

I have 2 classes, but how do I introduce one class into another through stating I am going to use of it's objects?

 

[ultimate reality1]

create an instance of that class with an object in your dependent class. In other words as an example:

public class Hourlies{
...<code here>

and I also have

public class Managers{
Hourlies obj = new Hourlies();

The above creates an Hourlies obj, calls its constructor, and stores the reference to that object in memory in my obj variable. Then when you want to use methods of the Hourlies class in the Employees class, just use the dot operator to access all public variables/methods using the reference name.
obj.getID();
obj.setName();
and so on...

Same methodology goes for all classes. That's called a dependency relationship or "using-a".

edit:changed names a tad