How Do I Set Java Environment Variables (Including CLASSPATH) on Windows?

Setting Environment Variables for Java on Windows

To establish environment variables for Java in a Windows operating system, specifically for the classpath, follow these instructions:

Environment Variables for Java SE Development Kit 8u112 on 64-bit Windows 7 or 8

User Environment Variables:

• JAVA_HOME: Path to Java root folder, e.g., "C:Program FilesJavajdk1.8.0_112"
• JDK_HOME: %JAVA_HOME%
• JRE_HOME: %JAVA_HOME%jre
• CLASSPATH: .;%JAVA_HOME%lib;%JAVA_HOME%jrelib
• PATH: Custom path entries;%JAVA_HOME%bin (ensure no other Java installation folders are referenced)

Additional Notes:

• Windows 64-bit users may need to use 'Progra~1' for 'Program Files' and 'Progra~2' for 'Program Files(x86)' in the paths.
• JAVA_TOOL_OPTIONS can be set as a user environment variable with the value "-Dfile.encoding="UTF-8"" to enforce UTF-8 encoding for Java and its tools.
• Remove the system environment variable 'C:ProgramDataOracleJavajavapath;' from 'Path' to maintain consistency during JDK updates.

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