7) Suppose there is Student class like
class student {
int age;
string name;
}
We want to store these objects in a HashMap. Do we need to
override any methods in Student class? If any which ones
and why? what if i just override equals or just hashcode?
what will be the results in both the cases?
Answer Posted / manoranjan
Logically no need to override any method but problem with
this design will be that we can not find the objects stored
in the hashmap. So to overcome this problem we need to
override equlas() and hashcode() mathod of Object
class.According to Sun java guide line if equals() method is
teeling that two objects are equal then their hashcode must
be same.But reverse is not true.
Is This Answer Correct ? | 10 Yes | 0 No |
Post New Answer View All Answers
How do you classify Dialog Box?
Can we create a class inside a class in java?
What are advantages and disadvantages of OOPs?
Tell me about different OOPS concepts.
If I don't provide any arguments on the command line, then what will the value stored in the string array passed into the main() method, empty or null?
Which package is imported by default?
What is stringreader?
What is the difference between size and length in java?
What are the limitations of procedural programming approach?
what is thread? : Java thread
What is visibility mode?
What is pre increment and post increment in java?
Is void a data type in java?
What does @override mean?
What do bitwise operators do?