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Learn Java by Example: Java Program to Print object of a class

By on Saturday, May 1, 2021

Java Program to Print object of a class

In this tutorial, we will learn to print the object of a class in Java.

Example 1: Java program to print the object


class Test{

}

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

    // create an object of the Test class
    Test obj = new Test();

    // print the object
    System.out.println(obj);
  }
}

Output

Test@512ddf17

In the above example, we have created an object of the class Test. When we print the object, we can see that the output looks different.

This is because while printing the object, the toString() method of the object class is called. It formats the object in the default format. That is,

  • Test – name of the class
  • @ – joins the string
  • 512ddf17 – hashcode value of the object

 

If we want to format the output in our own way, we need to override the toString() method inside the class. For example,


class Test{

  @Override
  public String toString(){
    return "object";
  }
}

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

    // create an object of the Test class
    Test obj = new Test();

    // print the object
    System.out.println(obj);
  }
}

Output

object

In the above example, the output has changed. It is because here we override the toString() method to return the string object.

 

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Disclaimer: The information and code presented within this recipe/tutorial is only for educational and coaching purposes for beginners and developers. Anyone can practice and apply the recipe/tutorial presented here, but the reader is taking full responsibility for his/her actions. The author (content curator) of this recipe (code / program) has made every effort to ensure the accuracy of the information was correct at time of publication. The author (content curator) does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by errors or omissions, whether such errors or omissions result from accident, negligence, or any other cause. The information presented here could also be found in public knowledge domains.
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