In Java Program, System Properties Always Includes Values for the Following Keys:
Key Description of Associated Value Java.version Java Runtime Environment Version Java.vendor Java Runtime Environment Vendor Java Runtor.url Java Vendor Url Java.home Java Installation Directory
java.vm.specification.version Java Virtual Machine specification version java.vm.specification.vendor Java Virtual Machine specification vendor java.vm.specification.name Java Virtual Machine specification name java.vm.version Java Virtual Machine implementation version java.vm. Vendor Java Virtual Machine Implementation Vendor Java.vm.name Java Virtual Machine Implementation Name
java.specification.version Java Runtime Environment specification version java.specification.vendor Java Runtime Environment specification vendor java.specification.name Java Runtime Environment specification name
Java.class.Version Java Class Format Version Number Java.class.Path Java Class Path Java.library.Path List of paths to searchhen Loading Libraries
Java.io.tmpdir Default Temp File path java.compiler name of jit compiler to use java.ext.dirs Path of Extension Directory or Directories
