How do I make a Class extend Observable when it has extended another class too?

Question

I am learning Java and I want to make my class into an observable class.

However I already have it extending another class.

What should I do?

Answer 1

Another option is to wrap your object in an Observable object.

public class MyObjectObservableWrapper implements Observable {  
  private MyObject myObject;
  public MyObjectObservaleWrapper(MyObject myObject){
    this.myObject = myObject;
  }
  // interface methods here
}

This option works when the data to be used by the Observable methods is accessible through public methods of MyObject. So, it may not be suitable for all cases.