Hello, readers welcome to the new post. In this post, we will discuss JAVA Language. It is a high-level special type, certain object, and object-oriented programming language. It is a general purpose language and has features to use anywhere and write at one time which means its code can used at any platform.
Here we will cover different features in detail. So let’s get started.
Introduction to Java
The JAVA language developed by Sun Microsystems in 1995, is famous and object-oriented. This language is used for Android development, site development, AI, and other applications. The language having pre-compliant binaries is easy to learn.
The main feature of JAVA is that it makes writing, compiling, and debugging easy process. It helps to make reusing code and modular programs. JAVA is made for developers to write code one time and use it anytime. That means Java-coded compiled can run on different platforms. Java applications are compiled with byte code that operates on a Java Virtual machine. Its syntax is like C/C++.
Key Features of Java
Platform Independent
The compiler transforms source code into byte code and then JVM applies bytecode. That byte code can run on any platform such as Windows, Linux, or MacOC. Every operating system comes with a different JVM but the output of all OS is the same when applying the byte code.
Object-Oriented Programming
JAVA is an object-oriented language that increases the use of objects and classes. Arrange the program in the form of a collection of objects for object-oriented programming and each denotes certain types of class.
- Abstraction
- Encapsulation
- Inheritance
- Polymorphism
Simple
The syntax used for Java is easy and simple to learn and those who know C or C++ can easily learn. It reduces complicated features such as pointers and many inheritances, that make it easy for write, debug, and maintain code.
Robustness
Java language is a reliable language and made in such a configuration that can easily detect errors as compared to other programming languages. The basic features of its robustness that error collection, handling, and memory allocation.
Variables and Data Types in Java
Java Variables
Different types of JAVA variables are
String
- It is used for storing text such as Hello Word
int
- It stores integers without points such as 3344, -3333
float
- It stores floating points number that has decimals like 20.99 or -20.99
char
- It is used for storing single characters like c, d, and A.
boolean
- It is used for string values having two conditions like true or false
Data Types
| Data Type | Size | Details |
| byte | 1 byte |
whole numbers from -128 to 127
|
| short | 2 bytes |
whole numbers from -32,768 to 32,767
|
| int | 4 bytes |
whole numbers from -2,147,483,648 to 2,147,483,647
|
| long | 8 bytes |
whole numbers from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
|
| float | 4 bytes |
fractional numbers. 6 to 7 decimal digits
|
| double | 8 bytes |
fractional numbers about15 decimal digits
|
| boolean | 1 bit |
true or false values
|
| char | 2 bytes |
single character/letter or ASCII values
|
What are Java basics?
- The basics of language come with variables, operators, expressions, statements, blocks, and control flow. Making variables and assigning names.
Different Java Terminologies
JVM
JVM is an integral component of the Java platform used for the application of Java bytecode. It provides the output of the JAVA program to be used for different languages.
Write code anyone then a compilation of that code is configured by JVAC compilers which are basic compilers used in the Java development kit (JDK). It gets the program as input and provides bytecode as output.
Then JVM executes bytecodes made by a compiler.
Bytecode
It is the denotation of Java code produced by Java compilers. It is an independent platform and is applied by JVM.
(JDK)
JDK term used for learning bytecode and JVM. It is jave development kit that comes with compilers, java runtime Environment (JRE), java debuggers, java docs, etc. Program execution in Java there is a need to use JDL for making, compiling, and running Java programs.
(JRE)
JDK comes with JRE that is installed on computers help the Java program run, but there are no features to compile it. JRE comes with browsers, apple support, JVM, and some plugins.
Garbage Collector
In Java, there is no option to delete objects For deleting or recollection of memory JVM comes with a program known as Garbage Collector.
It recollects objects that are not referenced. So JAVA helps to easily handle memory management. However, programmers must know about code because they use objects that are used for a longer time.
Advantages of Java
- Java code has features to run on a different platform that comes with JVM installation. So we just write one-time code and use any time
- It is an object-oriented language which means it follows encapsulation, inheritance, and polymorphism.
- JAVA also has built-in features security that help to make secure developing features like automatic memory handling and checking type.
- JAV comes with a larger and more active community for developers which means there is larger-based support for learning and using language.
- it is used for the creation of enterprise-level projects such as web applications, e-commerce systems, and database systems.
