Is there any other way to repaint from another class?

Question

I'm trying to repaint() from another class. I know one way to do this:

//FromClass.java:
SomeClass whatever = new SomeClass(this);

    //SomeClass.java:
        FromClass f;
        public SomeClass(FromClass from){ //constructor
        f = from;
    }
    //after a long part of code
    f.repaint();

Is there any other way to do this, without any parameters in class constructor? And sorry for my technical English, still learning.

Answer 1

There are numerous ways to share information between classes. I believe that the method you demonstrated is the most effective. Here are some other options:

• Make SomeClass a subclass of FromClass so that it inherits all of the methods defined in FromClass . Then create an instance of FromClass and call methods on the variable. Your class declaration would look like this:

   class SomeClass extends FromClass { ... super.repaint(); .... 

• Make FromClass an interface and implement it:

   public interface FromClass { void repaint(); } class SomeClass implements FromClass { repaint(); 

Just some other alternatives. :)