Installing and configuring multiple versions of the JDK under Windows

Source: Internet
Author: User

    1. Download the JDK that matches the system on the Oracle website as follows:

    2. 2

      To install jdk1.7 as an example, double-click Run Jdk-7u80-windows-x64.exe and click Next:

      (Note: Choose a directory with a file name without spaces when selecting the JDK installation directory)

    3. 3

      The installation screen appears and waits for the installation to complete:

    4. 4

      After the JDK installation is complete, the installation interface of the JRE appears, change the installation directory of the JRE, and click Next:

    5. 5

      The JDK installation was successful, click Close.

    6. 6

      According to the installation method of jdk1.7, install jdk1.8 and jdk1.8 respectively, the directory after the installation is complete

      END
Configuring Environment variables
    1. 1

      Right-click the computer, select Properties, select Advanced System settings, and create a new system environment variable:

      Variable name (N): Java_home

      Variable Value (V): JDK installation directory

      (e.g. C:\Application\Develop\Java\jdk\jdk1.7\jdk1.7.0_80)

    2. 2

      New system environment variable CLASSPATH:

      Variable name (N): CLASSPATH

      Variable Value (V):.; %java_home%\lib\dt.jar;%java_home%\lib\tools.jar;

    3. 3

      Edit environment variable Path:

      Variable name (N): path

      Variable Value (V):%java_home%\bin;%java_home%\jre\bin;

      END
Test JDK installation Complete and switch JDK version
    1. 1

      Win + R, enter cmd, enter the Java command at the command prompt, as shown below:

    2. 2

      Enter the Javac command at the command prompt, which appears as follows:

    3. 3

      To view JDK version information, at the command prompt, enter the java-version command:

    4. 4

      To switch the JDK version, you only need to modify the corresponding Java_home value, such as switching to jdk1.8, just change the java_home value to C:\Application\Develop\Java\jdk\jdk1.8\jdk1.8.0_ 131. View the version of the JDK after switching:

Installing and configuring multiple versions of the JDK under Windows

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