Java puzzle 05: Creating objects

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In this simple Java puzzle, we create two objects namely empA and empB.
We assigned the name Jack to the variable name of the object empA, and
assigned the name Emma to the variable name of the object empB.

What is the output of this program and why?

Java puzzle 5: Creating objects

Level: Normal

public class Employee
  static String name;
  public static void main(String[] args)
    Employee empA = new Employee();
    Employee empB = new Employee(); = "Jack"; = "Emma";
    System.out.print(", ");
Author: Sar Maroof

Answer explanation

  1. The objects empA and empB are two different objects, but the variable name is static.
  2. A static member of a class could be a variable or a method and
    it belongs only to the class unlike instance members which belong to the objects.
  3. The last time we assigned the value of the static variable name to Emma.
    That is why this program writes “Emma, Emma” to the standard output.

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Sar Maroof is graduated from HBO Amsterdam "higher professional education". He is a professional computer programming teacher, gives master classes and publishes technical articles. His experience with developing software started from 2001 and he has worked as a software developer for several big as well as small companies and later as a freelancer. He is the author of Java quizmaster and Build a Java application in 7 days.

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