Java series (1)-download and install JDK, java-jdk

Java series (1)-download and install JDK, java-jdk

1. Java platform version

J2SE: Java 2 Platform Standard Edition, java Platform Standard Edition

Java 2 Platform Micro Edition, Micro Edition of java Platform

J2EE: Java 2 Platform Enterprise Edition, java Platform Enterprise Edition

2. Expansion Platform

Java applications must be run on Java Virtual Machine.

Java programs on different platforms can be expanded by using the corresponding JVM of the platform.

3. JRE and JDK

JRE: Java Runtime Environment, java Runtime Environment

Contains the core class libraries required by JVM and java programs.

JDK: Java Development Kit, java Development Kit

Includes java development tools and JRE

Link:

Use the java program compiled by JDK and run it with JRE.

4. Download JDK

4.1 go to www.oracle.com and find the java development tool.

4.2 JDK7 is selected for this study.

4.3 find the version corresponding to the local system

5. Start to install JDK

Click the Installation File

Start Installation

5.1 start to install JDK and select the installation path

5.2 start JRE installation and select the installation path

5.3 if you see this interface, the installation is successful.

5.4 don't worry, check whether the installation is true

Enter java in the doc. If no exception is reported, the installation is successful.

5.5 understand JDK

Find the installation path and check if JDK has installed those things for us.