Constructor Overloading (java)

 CONSTRUCTOR OVERLOADING (java)

example of a class that has both a default constructor and a parameterized constructor in Java:

Source code:

  public class Person {

private String name; private int age; // Default constructor public Person() { name = "Unknown"; age = 0; } // Parameterized constructor public Person(String name, int age) { this.name = name; this.age = age; } // Getter methods public String getName() { return name; } public int getAge() { return age; } // Setter methods public void setName(String name) { this.name = name; } public void setAge(int age) { this.age = age; } }

In this example, we have a class called Person with two constructors - a default constructor and a parameterized constructor. The default constructor sets the name field to "Unknown" and the age field to 0. The parameterized constructor takes in two parameters - a name of type String and an age of type int. The this keyword is used to refer to the current object's fields, and the parameters are used to set the values of the object's name and age fields.

The class also has getter and setter methods to access and modify the private fields of the class.

With this class, we can create objects of Person using either the default constructor or the parameterized constructor:

// Creating an object using the default constructor Person p1 = new Person(); // Creating an object using the parameterized constructor Person p2 = new Person("John Doe", 30);

In the first example, p1 is created using the default constructor, and its name and age fields are set to "Unknown" and 0, respectively. In the second example, p2 is created using the parameterized constructor, and its name and age fields are set to "John Doe" and 30, respectively.

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