What is the equivalent concept of Java's property class in Objective-C?

I need to know which is equivalent concept of Java's property class in Objecti开发者_Python百科ve-C?

Have a look at NSUserDefaults for something similar to System.getProperty() or have a look at NSDictionary and NSMutableDictionary.

There is also the Property List Programming Guide.

This is a concept where we access the data in the form of key. You can look for KVC(key value coding) in cocoa for detailed explanation on this topic.

There is concept called property in Objective C(2.0) which does similar task, this basically add getter and setter method for the data. (http://www.cocoacast.com/?q=node/103)