how abstract class differs in Java and C++?

hello all,
i want to know if there is any difference in working and syntax declaration of abstract class in Java and C++.

java ----http://java.sun.com/docs/books/tutorial/java/IandI/abstract.html

c++-----http://publib.boulder.ibm.com/infocenter/lnxpcomp/v8v101/index.jsp?topic=/com.ibm.xlcpp8l.doc/language/ref/cplr142.htm