Java - Class

It is a template that describe the state and behaviour.

It is  a blueprint of object

Example:

Class

{

Fields

Methods

}

Example:

class Car{

int speed=0;

int geer=1;

public void increasespeed(int newvalue)

{ speed=speed+newvalue; }

Public void changegeer(int value)

{ geer=value; }

Void print()

{ system.out.printl(speed); }

Class Test {

Public static void main(String args[])

{ Car c1=new Car();

Car c2=new Car();

C1.increasespeed(10);

C2.changegeer(3)

C1.print();

C2.print();

}}

• The class name always should start with capital letter.
• there should not be any space between two word but you can use the underscore.
• Java file name and class name should be same.
 

public class HelloWorldApp {
    public static void main(String[] args) {
        // Display "Hello World!"
        System.out.println("Hello World!");
}
}
 

 

output:

 

Hello World!