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Question:
(a) Explain the importance of abstract classes in Java with an appropriate example.
(b) Explain what is meant by an interface in Java? Use a simple example to illustrate your answer.
(c) A GUI may contain text-fields, buttons, and other labels. A button usually triggers an event on the GUI. Explain the different processes in registering an event and handling the action performed by the button in Java.
(d) Write the code for a GUI which will allow a user to enter two numbers and then compute the product by clicking on a button. The result can be displayed in a text-field or as a label on the GUI.
Difference between HashMap and Hash table HashMap: It allow us to have null values and also one null key It is Unsynchronized. Iterator in HashMap is Fail-Safe.
Liferay Especialist and Java Programmer Project Description: We require to make a full functional Portal with online tools. JSF, Java, Portlets, Skills required: CSS
What is linear search? It is the simplest form of search. It searches for the element sequentially starting from first element. This search has a drawback if element is located
Why Local variable is preferred over Global variable ? In my point of view Global variable has a few advantage along with Local variables is preferred because of the subsequent
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A JMS client that makes and sends messages.
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