Getting started with Java
The purpose of this file is to take notes of the learnings from the book: Java - The Complete Reference (Herbert Schildt)
JVM
Code --> Java Compiler --> ByteCode --> JVM --> Low Level Executable Code
JVM: Interpreter of ByteCode.
- Provides Portability and Security
- Provides better exceution speed in comparison to other interpreted languages, mainly because JVM has JIT(Just In Time) compiler which helps by compiling a few pieces of bytecode.
Portability: JVM differs from platform to platform. Bytecode remains the same and can be executed on different machines with different operating systems and processors. (write once, run anywhere, any time, forever)
Security: JVM runs the Java code and prevents it from generating side effects outside of the JVM runtime env as JVM applies several runtime checks.
Java features
- Strictly typed
- Garbage collection
- Multithreaded (Parallel Programming)