Constructor Overloading in Java

Java Constructor Overloading

Input:

public class ConstructorEG {
  String name;
  Integer number;

  ConstructorEG(){ // default constructor
    System.out.println("Default Constructor called");
  }

  ConstructorEG(String defaultValue){ // parameterised constructor 1
    System.out.println("Parameterized Constructor for name called");
    name = defaultValue;
  }

  ConstructorEG(Integer number){ // parameterised constructor 2
    System.out.println("Parameterized Constructor for number called");
    this.number = number;
  }



  public static void main(String[] args) {
    ConstructorEG object = new ConstructorEG("custom value");
    System.out.println(object.name);
    
    
    ConstructorEG object2 = new ConstructorEG(123);
    System.out.println(object2.number);
  }
}


Output:

Parameterized Constructor for name called
custom value
Parameterized Constructor for number called
123

Constructor overloading in Java is a technique of having more than one constructor with different parameter lists. They are arranged in a way that each constructor performs a different task. They are differentiated by the compiler by the number of parameters in the list and their types.

To know more about Constructor Overloading read this article on Scaler Topic.