JVM2:JDK,JRE和JVM之间的关系

Oracle有两个实现Java8的平台:

1. Java开发工具包JDK(Java Development Kit), JDK包含了JRE的所有内容,还提供了必备的编辑器, 调试器等工具

2.JRE(Java Runtime Environment)Java运行时环境, JRE提供了库, JVM( Java Virtual Machine)和其他组件

Java产品的概念图:

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