(JAVA) B. How should objects be compared for equality? Why?
Comparing objects with equals() :-
We use the equals() method to compare objects in Java. In order to determine if two objects are the same, equals() compares the values of the objects
the == operator and equals() method may appear to do the same thing, but in truth they work differently. The == operator compares whether two object references point to the same object.
Example :-System.out.println(exampl1.equals(example2));
Comparing objects with hashcode() :-
We use the hashcode() method to optimize performance when comparing objects. Executing hashcode() returns a unique ID for each object in your program, which makes the task of comparing the whole state of the object much easier.
If an object’s hashcode is not the same as another object’s hashcode, there is no reason to execute the equals() method: you just know the two objects are not the same. On the other hand, if the hashcode is the same, then you must execute the equals() method to determine whether the values and fields are the same
Method Overriding is a technique where the behavior of the parent class or interface is written again overridden in the subclass in order to take advantage of Polymorphism. Every Object in Java includes an equals() and a hashcode() method, but they must be overridden to work properly.
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Is this equality true, if so why? If not, why not ? 21 Snel + 2 2 1 1 Sn-kell = 21 Sn.1| + & I Satel
In JAVA Create a PrintChar class that implements Runnable. The constructor should accept a character and an integer as parameters. The run method should print the character the number of times indicated by the integer. Create an application that instantiates two PrintChar objects, one passed “A” and 200 and one passed “B” and 200. It then instantiates and starts two thread objects, one for each of the two PrintChar objects. Experiment with the resulting system, using different numerical parameters for...
Besides answering, please explain why that is the answer. java Question 8. The relationship between a class and an object is best described as a) classes are instances of objects b) objects are instances of classes c) objects and classes are the same thing d) classes are programs while objects are variables e) objects are the instance data of classes Question 10. Assume that we have the class Airplane. A 3-by-4 two-dimensional array of objects of the class Airplane is...