Java

Java

• Java is a general-purpose programming language that is class-based, object-oriented, and designed to have as few implementation dependencies as possible
• First appeared: May 23, 1995
• Designed by: James Gosling
• Typing discipline: Static, strong, safe, nominative, manifest
• Developer: Sun Microsystems
• Filename extensions: java,.class,.jar
• Java is a widely used programming language expressly designed for use in the distributed environment of the internet. ... Java can be used to create complete applications that may run on a single computer or be distributed among servers and clients in a network.
• The language was initially called Oak after an oak tree that stood outside Gosling's office

Structure Of Java

Class pro

{

  Public Static void main(String args[])

{

   System.out.print(" ");

}

}

Advantage of Java

• Java is easy to learn. Java was designed to be easy to use and is therefore easy to write, compile, debug, and learn than other programming languages.
• Java is object-oriented. This allows you to create modular programs and reusable code.
• Java is platform-independent.
• Object-Oriented.
• Platform-Independent.
• Distributed computing
• Secure
• Memory allocation
• Multithreaded.

Disadvantage Of  Java

• Performance. Java programs take much longer time to run compared to C/C++.
• Memory. ...
• Cost. ...
• Low level programming. ...
• Garbage collection. ...
• No Unsigned Types Unlike C/C++, Java does not support unsigned int, unsigned char, … etc.

Uses Of Java

• Mobile applications (specially Android apps)
• Desktop applications
• Web applications
• Web servers and application servers
• Games
• Database connection
• And much, much more!

Example Of Java

MyClass.java

public class MyClass {
public static void main(String[] args) {
int sum1 = 100 + 50;
int sum2 = sum1 + 250;
int sum3 = sum2 + sum2;
System.out.println(sum1);
System.out.println(sum2);
System.out.println(sum3);
}
}

O/P: 150

         400

         800

Key Words Of Java

• const
• continue
• debugger
• default
• delete
• do
• double
• else
• eval
• false
• final
• finally
• float
• for
• function
• goto
• if
• implements
• in
• instanceof
• int
• interface
• let
• long
• native
• new null
• package
• private
• protected
• public
• return
• short
• static
• switch
• synchronized
• this
• throw
• throws
• transient
• true
• try
• typeof
• var
• void
• volatile
• while
• with
• yield