core java and advanced java

whats the difference between core java and advanced java??

wat all field does advance java include??

There isn't a use of these terms in the JDK. However, core may mean the non-GUI parts of the JRE with advanced using the Swing/AWT stuff. Or it may be that core implies Java SE (the standard edition) and advanced means Java EE (the enterprise edition which builds on the SE).

Again, this is kind of up to the person describing it.