Java Gett variable from within a loop in another class?

Question

I was wondering how it is possible to get the value of a variable/boolean that is inside of a loop in a different class.

I would have a variable in one class and want get that in another one:

Class1:

public void mainLoop()
{
while(!Display.isCloseRequested)
{
    frames++
    if(frames == 200)
    {
        key = 5
        run = false;
    }

    if(frames == 400)
    {
        key = 10
        run = true;
    }
}
}

and in my other Class2 I want to acess the changed varibles:

public Class2()
{
public void printVariables(int key)
{
    if(key == 5) { System.out.println("KEY 5"); }
    if(key == 10) { System.out.println("KEY 10"); }
    if(run == false) { System.out.println("RUN FALSE"); }
    if(run == true) { System.out.println("RUN TRUE"); }
}
}

How?

Thanks for any Help!

Answer 1

Add it as a parameter to the method:

public Class2()
{
    public void printVariables(int key)
    {
        if(key == 5) { System.out.println("KEY 5"); }
        if(key == 10) { System.out.println("KEY 10"); }
        if(run == false) { System.out.println("RUN FALSE"); }
        if(run == true) { System.out.println("RUN TRUE"); }
    }
}

And then call that method with an instance of the class:

public void mainLoop()
{
    Class2 cls2 = new Class2();
    while(someCondition == true)
    {
        frames++
        if(frames == 200)
        {
            key = 5
            run = false;
        }

        if(frames == 400)
        {
            key = 10
            run = true;
        }
        cls2.printVariables(key);
    }
}

Or, if you can, make the method static and call it statically (ie Class2.printVariables(key) ).