# 02-forgot-the-preview-flag
--- javac ValueClasses.java (no --enable-preview):
src/ValueClasses.java:3: error: value classes are a preview feature and are disabled by default.
	value record Point(int x, int y) {}
	^
  (use --enable-preview to enable value classes)
--- java ValueClasses (compiled with the flag, run without):
Error: LinkageError occurred while loading main class ValueClasses
	java.lang.UnsupportedClassVersionError: Preview features are not enabled for ValueClasses (class file version 72.65535). Try running with '--enable-preview'