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 Corejava Tutorial    Table of Contents: Introduction  Java Features Java Architecture Java program structure Rules for writing java program Software Links     Introduction Java introduced with the version 1.0 in 1995 by James Gosling who know as father of Java. Currently, JDK version is Java SE 17 . Java is one of the programming language like C, C++ but there are some drawbacks in C, C++, ex: they are platform oriented. Java actually developed, to write programs which can be embedded in consumer electronic devices, such as Fridge, Oven etc., to set automatic timer controls which gives buzzer automatically after elapsing certain time. Java invention also made possible exchanging data from heterogeneous websites, because Java code generates byte code(.class) after compilation. This can understand by any computer.   Java Features: Java has the following features which made it popular. Java is a Network based language. Java allows to develop network base...

Learn Packages in Java   Table of Contents What is  a package in Java? Builtin Packages User defined packages Package Declaration in java program Why package? Access specifiers What is  a package in Java? A Package contains a collection of classes, interfaces, and sub packages. These all are belongs to one group. Packages can be categorized into Two. Builtin Packages  User defined packages  Builtin Packages   Ex: java. lang .*; java. io .*;  java. sql .*;  java. awt .*; User defined packages   package mypack1; package mypack2;   Package Declaration in Java Program  first line package declaration  importing statements  class declaration. Syn: package <packagename>; Ex:     package p1;   Ex:   package p1; // package declaration   import java.io.* ; // importing statements    class Test { // class declaration. ........ ........ }...