JAVA Histories

Before JAVA

C, C++, pascal these are only the programing language was used before java, then had some problem what is
1.Platform dependencies(software + hardware = plateform)
Here developer need to create separate version for different systems. this was taken time, cost and maintenance.
2.Memory Management
language like c, c++ required programmers to manually manage memory.
if programmer forgot to free memory then
1.memory leack accurred
2.Program crashed
3.system become slow

3.Security Issue:
c, c++ allows direct memory access.
This could cause
1.Buffer overflows
2.Crashes
3.Security vulnerabilities

4.Internet was Growing
Around 1990s,, the internet started growing so developer need a language like without plateform dependencies so.

Who created java?

Java was created by james gosling, in 1991 at sunmicrosystem.
In early stage we called oak , instead of java

How java solved the program

In traditional language;

C Code
↓
Windows Compiler
↓
Windows Program

but in java :

Java Code
↓
Java Compiler
↓
Bytecode (.class)
↓
JVM(Java Virtual Machine)
↓
Any Operating System

Problem Before Java	Java Solution
Platform dependent	JVM made it portable
Manual memory management	Garbage Collector
Security issues	No direct memory access
Internet applications difficult	Built-in networking support
Complex development	Simpler than C++

why java became popular:

because that is object oriented program

java support :
1.class
2.object
3.inheritance
4.Polymorphism

Strong Security

Java programs run inside the JVM.

advantages:
Memory safety
Better security
Fewer crashes

Rich Libraries

Java comes with libraries for:

Networking
File handling
Collections
Database access
GUI development

Java Impact

Java became one of the most successful languages in history.

Enterprise applications
Banking systems
Android apps (historically)
Web applications
Backend servers
Cloud systems
Big Data tools

Examples:

Amazon
Netflix
LinkedIn

java flow

English --[JDK(compiler)]-- byte code --(JIT compilar)--->0,1(binary)

JDK -- stands for Java Development Kit , which is used to find out syntax error and exception ,

JDK is Platform independent

after byte code all are consider as Java Runtime Environment

Java Runtime Environmen have Java Virtual Machine(jvm)

JVM have JIT Compiler