JVM2:JDK,JRE和JVM之間的關係

Oracle有兩個實現Java8的平臺:

1. Java開發工具包JDK(Java Development Kit), JDK包含了JRE的所有內容,還提供了必備的編輯器, 調試器等工具

2.JRE(Java Runtime Environment)Java運行時環境, JRE提供了庫, JVM( Java Virtual Machine)和其他組件

Java產品的概念圖:

JDK

Java Language

Java Language

Tools &
Tool APIs

java	javac	javadoc	jar	javap	jdeps	Scripting
Security	Monitoring	JConsole	VisualVM	JMC	JFR
JPDA	JVM TI	IDL	RMI	Java DB	Deployment
Internationalization		Web Services		Troubleshooting

JRE

Deployment

Java Web Start

Applet / Java Plug-in

User Interface
Toolkits

JavaFX

Swing	Java 2D	AWT	Accessibility
Drag and Drop	Input Methods	Image I/O	Print Service	Sound

Java SE
API

Integration
Libraries

IDL

JDBC

JNDI

RMI

RMI-IIOP

Scripting

Compact
Profiles

Other Base
Libraries

Beans	Security	Serialization	Extension Mechanism
JMX	XML JAXP	Networking	Override Mechanism
JNI	Date and Time	Input/Output	Internationalization

lang and util
Base Libraries

lang and util
Math	Collections	Ref Objects	Regular Expressions
Logging	Management	Instrumentation	Concurrency Utilities
Reflection	Versioning	Preferences API	JAR	Zip

Java Virtual Machine

Java HotSpot Client and Server VM