How to Achieve a Constructor in Java?
You can achieve a constructor by:
- Creating a class
- Writing a method with the same name as the class
- Using the new keyword to call it when creating an object
Step-by-Step Example
Step 1: Create a Class
Step 2: Define a Constructor
Step 3: Create an Object to Call the Constructor
class Student {
int rollNo;
String name;
// Constructor
Student(int rollNo, String name) {
this.rollNo = rollNo;
this.name = name;
}
void display() {
System.out.println(rollNo + " " + name);
}
public static void main(String[] args) {
Student s1 = new Student(1, "Kavitha"); // Constructor called
s1.display();
}
}
How Constructor is Achieved Here
- The constructor is created using the same name as the class
- It initializes object values
- It is automatically called when creating object
new Student(1, "Kavitha");