How Do I Set Java Environment Variables (Including Classpath) in Windows?

Setting Environment Variables for Java in Windows

When working with Java applications in Windows, it's essential to configure the system's environment variables to ensure the applications can access the necessary resources. This question addresses the specific task of setting the classpath, a fundamental Java environment variable.

Solution

Environment Variables

For Java SE Development Kit 8u112 on a 64-bit Windows 7 or Windows 8 system, set the following user environment variables:

• JAVA_HOME: C:Program FilesJavajdk1.8.0_112
• JDK_HOME: %JAVA_HOME%
• JRE_HOME: %JAVA_HOME%jre
• CLASSPATH: .;%JAVA_HOME%lib;%JAVA_HOME%jrelib
• PATH: your-unique-entries;%JAVA_HOME%bin

Optional Recommendations

Additionally, consider the following optional recommendations:

• Create a user environment variable named JAVA_TOOL_OPTIONS with the value -Dfile.encoding="UTF-8". This ensures Java runs with the UTF-8 character encoding by default.
• Remove the entry C:ProgramDataOracleJavajavapath; from the system environment variable Path. This ensures consistent environment settings during JDK updates.

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