Java Series Learning (i)-jdk download and installation

1.Java Language Platform version

J2se:java 2 Platform Standard Edition,java Platform Edition

J2me:java 2 Platform Micro Edition,java Platform Mini version

J2ee:java 2 Platform Enterprise Edition,java Platform Corporate Edition

2. Platform expansion

Java applications that need to run on a Java Virtual machine (Java VM).

Java programs on different platforms, you can rely on the platform of the corresponding JVM, you can achieve the expansion platform.

3.JRE and JDK

Jre:java Runtime Environment,java Operating environment

Contains the core class libraries required by the JVM and Java programs

Jdk:java Development Kit,java Development Kit

Contains Java development tools and JRE

Relationship:

Use Java programs written with JDK, and then pass it to the JRE to run

4. Download the JDK

4.1 Go to official website www.oracle.com, find Java development tools

4.2 This study, the choice is JDK7

4.3 Find the corresponding version of the native system

5. Start installing the JDK

Click Install File

Start installation

5.1 Start the JDK installation and select the installation path

5.2 Start the JRE installation and select the installation path

5.3 See this interface to indicate successful installation

5.4 Don't worry, then check if it really installs

Under Doc, enter Java, if the exception is not reported, the installation is successful

5.5 Understanding JDK

Find the path you just installed, and see if the JDK installed those things for us.

Java Series Learning (i)-jdk download and installation