Question

I have two packages inside my project, a and b.

a is my “main class” that runs when the program runs but I need to make b run from a (if that makes sense).

I’m sure its something along the lines of PackageB.BMain but I’m not sure.

Edit:

Okay so I’ve learned a few new things, to start my main project is RevIRC, inside that I have two packages, MainChat and RevIRC, now when I run the program RevIRC is ran, I need to make Mainchat run when RevIRC is ran.

Like I said before I’m sure its something along the lines of RevIRC.MainChat.ChatMain() but I can’t seem to figure it out.

Answer 1

You have 2 options:

• Either create a new instance of B from A, like so: PackageB.BMain b = new PackageB.BMain();
• Access the methods in BMain in a static way like so: PackageB.BMain.someMethod();`

Note that you can use either of these exclusively or mix them up together, however, it all depends on how you have written your BMain class.

So for instance:

package PackageB

public class BMain
{
    public BMain()
    { }

    public void foo()
    {
        System.out.println("This is not a static method. It requires a new instance of BMain to be created for it to be called");
    }

    public static void bar()
    {
        System.out.println("This is a static method. It can be accessed directly without the need of creating an instance of BMain");
    }
}

Then in your main class (the class which has the main method):

package PackageA

public class AMain
{

    public static void main(String[] args)
    {
        PackageB.BMain.bar();

        PackageB.BMain bInstance = new PackageB.BMain();
        bInstance.foo();
    }
}