Programming Tips - How is the INVALID_HANDLE_VALUE defined?

Date: 2014may5 Language: Java Keywords: JNA, win32 Q. How is the INVALID_HANDLE_VALUE defined? A.
/** Constant value representing an invalid HANDLE. */ public HANDLE INVALID_HANDLE_VALUE = new HANDLE() { { super.setPointer(Pointer.createConstant(-1)); } public void setPointer(Pointer p) { throw new UnsupportedOperationException("Immutable reference"); } };