Java Basic Understanding!

Dynamic site:

Jvm:java virtual Machines

Components of Java Technology

Java programming language

Java class file format

Java API

Java VMS

Java's compilation environment:

Source code: End in. java

X.java--java compiler (JAVAC)--A.class

Java's operating environment

A.class--JVM <--Object.class, String.class

JVM Components:

Java class loader (Java class loader):

Java Execution engine

Features of the Java language:

Object-oriented:

Class:

Process-oriented with instruction as core

Object-oriented with data as its core

Multithreading: Adapting to parallel architectures for efficient execution of programs

Garbage collection: GC

Dynamic Links:

Android:java + JVM + Linux

Ios:object-c + FreeBSD

Jdk:java Development Kit

Jre:java Running Environment (Java runtime Environment)

Composed of the JVM (Hotspot) +javase API

Java Se:standard Edition, J2SE jdk+ Extra Class Library

Support for desktop-level desktops with complete Java Core API

Java ee:enterprise Editing Java SE + Enterprise class Library

Support for enterprise applications that use a multi-tiered architecture, including Java SE, with an additional number of enterprise class libraries:

Jdk:

Oracle:jdk

Oracle:jrockit

Open:openjdk

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Java Basic Understanding!