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Explain the user defined Exceptions.
User Defined Exceptions are the exceptions which are defined by user for specific purposed. This enables custom exceptions to be generated and caught in the similar manner as normal exceptions. When defining a User Defined Exception, we need to take care of the below aspects:
It must be extend from Exception class.
Use toString() method to display information about exception.
What is PortableRemoteObject.narrow() method and what is used for? Ans) Java RMI-IIOP gives a mechanism to narrow the the Object you have received from from your
Why do we need wrapper classes? It is sometimes simpler to deal with primitives as objects. Moreover most of the collection classes keep objects and not primitive data types. A
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i have got project of Vending machine. would you please help me about how to start and how to use coding.thanks
Write a Java ADB client to perform the following- The client will read the contents of the file - invoice.txt. The first line of the file will display the type of the currency. The
What is heuristic? Heuristic is a procedure which commonly, but not always, works or that provides nearly the right answer.
The typical use of the roster class is to display a tree view of groups and entries along with the current presence value of each entry. As an example, see the image showing a Rost
The IncludeAction class is useful when you require to integrate Struts into an application that uses Servlets. Use the IncludeAction class to contain another resource in the respon
what is java
This assignment is intended to write a simple program in Java and to use the concept of Object Oriented Technology. Open a project named "MyProject" in NetBean. Under this proje
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