What's the difference between a System property and environment variable

java environment-variables classpath system system-properties

Environment variables are specific to the operating system. Properties are JVM only.

java environment-variables classpath system system-properties

System.getProperty("Propertname") **Platform Independent**

The above method will return JVM arguments and properties.

System.getenv("EnvName")       **Platform Dependent**

The above method returns your operating system environment variables.

In Linux you can set a environment variable from the shell using the following command.

export SYSTEM_TYPE=PROD

In Java you can read the variable by

System.getenv("SYSTEM_TYPE")

The above code will return PROD

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