set variable in calling object from object being called

Question

In Java, how do you set variables in a calling object from the object that is being called? I guess I could set up some kind of struct class, but can someone show me if there is a simpler way to do it, such as some modification of the pseudocode below:

public class Example(){  
  int thisInt;
  int thatInt;

  public static void main(String[] args){  
    Another myAnother = new Another();
  }
  setThisInt(int input){thisInt=input;}
  setThatInt(int input2){thatInt=input2;}
}

public class Another(){  
  void someFunc(){
    this.Example.setThisInt(5);//I know this syntax is wrong
    this.Example.setThatInt(2);//I know this syntax is wrong
  }
}

Can you please explain your reasons for doing this? I expect that there are other solution to your original problem that are in line with common Object Oriented programming practices. — Code-Apprentice
– Code-Apprentice, Commented Jul 9, 2013 at 0:03

nanofarad · Accepted Answer · 2013-07-08 23:59:01Z

1

Pass in a reference to the object.

public class Another{  
  void someFunc(Example ob){
    ob.setThisInt(5);
    ob.setThatInt(2);
  }
}

If you're using nested classes(one class inside the other with an implied parent-child relationship), use:

OuterClass.this.setThisInt(5);

and so on.

answered Jul 8, 2013 at 23:59

nanofarad

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2 Comments

CodeMed Over a year ago

+1 for the quick answer. Thank you. Impressive response time.

nanofarad Over a year ago

@CodeMed Yeah, I keep this open in a tab at all times. Really handy.

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