initializes the default filesystem instance as a java.io.filefile system , creating one iff needed , and returns the instance . this method is idempotent as long as the initialization is of the same type native/javaio/union . concode_field_sep FileSystem defaultFileSystem concode_field_sep FileSystem initDefaultAsNative
FileSystem function ( ) { if ( ! ( defaultFileSystem instanceof JavaIoFileSystem ) ) { defaultFileSystem = new JavaIoFileSystem ( ) ; } return defaultFileSystem ; }