StackOverflowError when calling method of subclass object?

Question

Executing the Test class gives a StackOverFlow error :(

Parent class :

package Pack;

public class Alpha {
  protected void sayHi() {
    System.out.println("Hi...from Alpha");
  }
}

Child class :

import Pack.Alpha;

public class AlphaSub extends Alpha {
  AlphaSub sb=new AlphaSub() ;

  void hi() {
    sb.sayHi() ;

  }
}

Test class :

public class test {
public static void main(String[] args) {

    AlphaSub ob=new AlphaSub() ;
    ob.hi() ;
}

}

score 2 · Accepted Answer · answered Oct 02 '17 at 19:37

2

Your stackoverflow has nothing to do with the inheritance, but with this line (inside AlphaSub):

AlphaSub sb=new AlphaSub() ;

You are creating a new AlphaSub instance inside your AlphaSub, which causes an endleess loop. I assume you don't even make it to the ob.hi() line in your test

answered Oct 02 '17 at 19:37

Nir Levy

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I apologize for linking this with inheritance. i got it .. its due to instance creation inside its own class (sub-class). – Jasnoor Singh Brar Oct 02 '17 at 19:52

StackOverflowError when calling method of subclass object?

1 Answers1