JDK installed in Windows environment

1. Download the JDK file (http://www.oracle.com/technetwork/java/javase/downloads/index.html)

　　

2. Installing JDK Files (jdk-8u91-windows-x64.exe)

3. Configure environment variable information (right-click "My Computer"-"advanced"-"environment variable")

1) Create a new "java_home" variable in the system variable, the value of the variable is: E:\Program files\java\jdk1.8.0_91 (fill in according to your own installation path)

　　

2) New "classpath" variable, the value of the variable is:.; %java_home%\lib;%java_home%\lib\tools.jar

　　

3) Add the variable value in the path variable (existing without new):%java_home%\bin;%java_home%\jre\bin (Note the ";" between the variable values) Separate, note win10, click Edit text)

　　

　　

　　

4) "Start"-"Run"-enter "Javac" and "enter" if you can print the usage instructions successfully!

　　

Analysis of supplemental environment variables:

The installation path of the JAVA_HOME:JDK;

Classpath:java load Classpath, only the class is recognized by the Java command in Classpath, and a "." is added before the path. Represents the current path;

Path: The system can identify the Java,javac command under any path;

JDK installed in Windows environment