user defined objects in java

The return type can be any of Java's primitive data types, any class type, or void • Methods with a return type of void do not return a value to the caller Page 5 

For example, it can connect to a remote object to retrieve a value that can be used in validating a field To use a custom class, you have to write a Java class that 

When you do start writing your own classes in Java, another tenet of OOP makes this easier: The behavior of an object is defined by the methods that you can call In the Java programming language, you use constructors to construct new

Java classes, including the use of access rights, inheritance, method definitions, constructors, and In Java, methods must be defined within the class definition

The JRE implements the Java SE platform and makes it possible to run Java A user-defined type is a type that's defined by the developer using a class, an interface, an enum, or an annotation type and whose values are objects 10 An array 

is described with a special diagram known as a class diagram 1 2 Comparison of OOP and Non-OOP Despite the wide use of OOP languages such as Java, 

How to use primitive types to build user-defined types? object, consists of one or more data type objects Example: sequential files, Vector, List in Java

10 Java Classes (cont'd) Class variables methods instance object 1 declare instance In Java, variables of user defined types are pointers, or references, to  

the behavior of an object is defined by a set of methods 3 Classes are templates that define objects of the same type •Java methods always use call-