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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.
ActionServlet performs the role of Controller: ? Process user requests ? Verify what the user is trying to achieve according to the request ? Pull data from the model (if
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1. Unit tests :There are two popular processes to testing server-side classes: mock objects, which test classes by checking the server container, and in-container testing, which
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If any of the above conditions does not met, then the program will generate compilation errors. Today Rahul has written his first program "Hello World", but he is not sure about th
what are all possible ways in java for user input and output
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