Packages In Java

Chapter: Miscellaneous Last Updated: 24-03-2017 04:25:21 UTC

Program:

            /* ............... START ............... */
                
package com.reallybigindex.java.maths.formulas;

public class Area {
    /**
     * calculate the area of Rectangle
     * */
    public double calculateArea(double width, double height){
        double area = width*height;
        return area;
    }
 
    /**
     * calculate the area of Square
     * */
    public double calculateArea(double side){
        double area = side*side;
        return area;
    }    
}

                /* ............... END ............... */
        

Notes:

  • A package is a namespace that organizes a set of related classes and interfaces. Java packages can be stored in compressed files called JAR files.
  • A java package is a group of similar types of classes, interfaces and sub-packages.
  • Package in java can be categorized in two form, built-in package and user-defined package.
  • Java package is used to categorize the classes and interfaces so that they can be easily maintained.
  • Java package provides access protection.
  • Java package removes naming collision.
  • Advantages of using a package
  • Reusability: Reusability of code is one of the most important requirements in the software industry. Reusability saves time, effort and also ensures consistency. A class once developed can be reused by any number of programs wishing to incorporate the class in that particular program.
  • Easy to locate the files.

Tags

Packages, Java, Miscellaneous

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