Right-click on My Computer and select Properties
After entering, select Advanced System Settings, then select Environment Variables. After opening the Environment Variables dialog box, click the [New] button under [System Variables] below
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and then enter JAVA_HOME, the corresponding variable value is the directory where your jdk is installed
Click OK.
Then create a new variable name: classpath
Variable value: .;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar Click OK
Then find the variable named "Path" in the system variables and double-click it. The new variable is %JAVA_HOME%\bin
After confirmation, enter "java", "java -version" (java -version represents the version of java you installed) and javac respectively, if all are normal Running means that java has been installed correctly
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