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You should override the hashCode() and equals() functions from the Object class. The default implementation of the hashcode() and equals(), which are inherited from the java.lang.Object needs an object instance's memory location. That can cause serious problems when two instances of the car objects have the similar color but the inherited equals() can give false because it uses the memory location, which is distinct for the two instances of object. Also the toString() method may be overridden to give a proper string representation of your object.
You are part of a team creating a system to keep track of computer science books that a publisher is producing. Create a UML class diagram for a "computer science book". You must h
I do not understand how to do this? can someone help me?
Write a java code to draw Ovals and Circles? Java has techniques to draw outlined and filled ovals. As you'd probably guess these methods are called drawOval() and fillOval() c
what is the use of marker interface?
A fictitious train company, 'Transrail', has commissioned you to write a program that manages a list of train tickets. The program should display a text menu that prompts the us
what is the use of design pattern in java ?
Can a human doctor be replaced through an Expert System? Give reasons to support your answer. Expert System is a computer system that simulates the knowledge and expertise of a
Errors: When a dynamic linking failure or some other "hard" failure in the virtual machine happens, the virtual machine gives an Error. Typical Java programs could not find Error
Object diagrams define instances instead of classes. They are useful for illustrating some complicated objects in detail about their recursive relationships. When
1. Which of the following are not valid Java identifiers, and why? (a) wolVes (b) United(there is only one) (c) 87 (d) 5 3 (e) Real ale (f) isFound?by 2. A cla
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