What are classes in Java

First things that comes in mind are

• A class is a blueprint from which objects are created.
• They are wrappers and have everything inside them e.g Functions/Methods/Variables etc.
• They can be public or default but not private or protected.
• Each Class has a name, and may belong to a package.
• A class can have both static and non static methods and variables.
• A class can not be static (however inner classes can be).

Definition

A class is the blueprint from which individual objects are created. A class containes

• A main method marked as public static void and taking an array of String arguments.
• Instance variables that are inside a class but outside all function.
• Local variables that are inside a function. Their scope is limited to the function only.
• Member functions that can be either static, non static or final or final static.
• A package declaration, this is important for grouping same type of classes together.

package com.ekiras.demo;

public class HelloWorld{

  int instanceVarible = 1;

  public static void main(String args[]){

    System.out.println("HelloWorld");
  }

  public void method(){
    
    String localVariable = "Hi";
  } 

}

A simple class may look like the one shown above.

Access specifiers of a class

A class can have public or default access specifier. The class can not be private or protected.