How to Create Custom Class in Java?
Class is the collection of objects. Class is not a real-world entity it is just only templates and prototypes or blueprints. Class does not occupy memory. We can write a custom class as per our choice for an illustration purpose a sample is shown in the program below as a helper class.
Example:
Java
// Java Program to Creating our Own Custom Class// Importing input output classesimport java.io.*;// Class 1// Helper classclass Employee { // Member variables of this class // first attribute int id; // second attribute int salary; // third attribute String name; // Member function of this class // Method 1 public void printDetails() { // Print and display commands System.out.println("My id is " + id); System.out.println("This is my name " + name); } // Method 2 public int getSalary() { // Simply returning the salary return salary; }}// Class 2// Main classclass Custom { // Main driver method public static void main(String[] args) { // Display message only System.out.println("This is the custom class"); // Creating object of custom class in the main() // method Instantiating a new Employee object Employee harry = new Employee(); // Again creating object of custom class and // instantiating a new Employee object Employee robin = new Employee(); // Initializing values for first object created // above harry.id = 23; harry.salary = 100000; harry.name = "Ritu bhatiya"; // Initializing values for second object created // above robin.id = 25; robin.salary = 150000; robin.name = "Amit thripathi"; // Printing object attributes by // calling the method as defined in our class harry.printDetails(); robin.printDetails(); // Calling the method again of our class and // storing it in a variable int salary = robin.getSalary(); // Print and display the above salary System.out.println("Salary of robin : " + salary + "$"); System.out.println("ID : " + harry.id); }} |
Output
This is the custom class My id is 23 This is my name Ritu bhatiya My id is 25 This is my name Amit thripathi Salary of robin : 150000$ ID : 23
