Core Java Interviewfragen und Antworten
Question: What is data encapsulation?Answer: Encapsulation may be used by creating 'get' and 'set' methods in a class (JAVABEAN) which are used to access the fields of the object. Typically the fields are made private while the get and set methods are public. Encapsulation can be used to validate the data that is to be stored, to do calculations on data that is stored in a field or fields, or for use in introspection (often the case when using javabeans in Struts, for instance). Wrapping of data and function into a single unit is called as data encapsulation. Encapsulation is nothing but wrapping up the data and associated methods into a single unit in such a way that data can be accessed with the help of associated methods. Encapsulation provides data security. It is nothing but data hiding. |
Zum Wiederholen speichern
Speichere diesen Eintrag als Lesezeichen, markiere ihn als schwierig oder lege ihn in einem Wiederholungsset ab.
Melde dich an, um Lesezeichen, schwierige Fragen und Wiederholungssets zu speichern.
Ist das hilfreich? Ja Nein
Am hilfreichsten laut Nutzern:
- How could Java classes direct program messages to the system console, but error messages, say to a file?
- What are the differences between an interface and an abstract class?
- Why would you use a synchronized block vs. synchronized method?
- How can you force garbage collection?
- What are the differences between the methods sleep() and wait()?