Java is the primary language used to create Android apps. Java, you may have heard, is an ‘object oriented’ programming language. But what precisely does that mean?

You’ve learned that Java objects are passed by value, meaning that a copy of the value is passed. Just remember that the copied value points to a real object in the Java memory heap.

Today, C++, C#, Java, Visual Basic.NET and Python are popular object-oriented languages. The following compares basic OOP terms with traditional programming. See object-oriented DBMS .