IEnumJAVAPROPERTIES

// IUnknown methods
HRESULT QueryInterface(REFIID riid, LPVOID *ppv);
ULONG   AddRef();
ULONG   Release();

// IEnumJavaPROPERTIES methods
ULONG   Next(ULONG celt, LPJAVAPROPERTY rgelt, ULONG *pceltFetched)
HRESULT Skip(ULONG celt)
HRESULT Reset()
HRESULT Clone(LPENUMJAVAPROPERTY *ppenum);

This enumerator lists key/value pairs for IJavaExecute2::SetSystemProperties.