Question

I have three classes (class A, class B, and class C).

Class A calls an instance of B and runs start().

Class B extends Thread, so when start() is called, anything in the run() method is executed.

In the run() thread, there is an instance of class C.

Is there anyway to allow a method in Class C to call a method in Class A, without instantiating a new instance of Class A?

Since I can’t extend class A to class B (because “Thread” is already extended), I don’t know how I’d go about doing this.

Sorry for being vague, but my project features far too much code and is way too complicated to provide a direct code example.

Thanks!

Answer 1

So you have

class A {
 void run()
 {
  new B().start();
 }
}

class B extends Thread {
  public void run(){
    C c = new C();  
    c.do something with A .. }
}

You can pass the caller, which might get ugly, as you have to pass A all the way down to C through B:

class A {
 void run()
 {
  new B(this).start();
 }
}

class B extends Thread {
  public void run(A a){ 
    C c = new C();
    c.do something(a).. 
  }
}

or simplify, especially if B and C have no other reason for being:

class A {
 public void run()
 {
   this.do something() ... 
 }
}