Java Technology

 Introduction      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. There are many built-in packages such as java, lang, awt, javax, swing, net, io, util, sql etc. Here, we will have the detailed learning of creating and using user-defined packages. Simple example of java package The package keyword is used to create a package in java. //save as Simple.java   package mypack;   public class Simple{    public static void main(String args[]){       System.out.println("Welcome to package");      }   }   How to access package from another package? There are three ways to access the package from outside the package. 1. import package.*; 2. import package.classname; 3. fully qualified name. 1. Using packagename.*      If you use package.* the...