How to set java environment variables

How to set java environment variables: 1. Open [Computer], [Properties], [Advanced System Settings], [Environment Variables] in sequence; 2. Create a new [JAVA_HOME] variable and edit the [Path] variable ;3. Finally, create a new [Classpath] variable and edit it.

Specific method:

First right-click [Computer] and enter [Properties] and then select [Advanced System Settings]

Click to enter [Environment Variables] in [Advanced] to enter the environment variable editing interface

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In the [System Variables] below, the JAVA_HOME variable does not exist, then we need to click [New]

Variable Name input: JAVA_HOME

The variable value refers to the actual installation path (for example: C:\Program Files\Java\jdk-9).

Finally click OK.

Path variable setting

Also in [System Variables] we can see that the path variable already exists, then we only You need to click [Edit] to enter the editing of the path variable

The variable name remains unchanged and the variable value is changed to [%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin; 】, and finally click OK

Classpath variable setting: There is no need to set classpath after java1.5 version

Similarly, in the system There is also no Classpath variable present in the variables. Click to enter [New]

Type the variable name [Classpath]

Type the variable value [.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME %\lib\tools.jar; ]

Note: Do not miss the symbols in the variable value.

Finally click OK.

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