Why it is necessary to override hashcode and equals method of key for Hashmap?
878
What issues should be considered when overriding equals and hashCode in Java?
69886
Bit-shifting in Effective Java hashCode() implementation
51487
How to call a method stored in a HashMap? (Java)
5608
Overriding the java equals() method - not working?
108024
What are the differences between a HashMap and a Hashtable in Java?
156253
Why is a method not identical to itself?
8277
Difference between HashMap, LinkedHashMap and TreeMap
91806
Warning shows when i use Hash Map In android(Use new SparseArray)
25288
How to make HashMap work with Arrays as key?
140783
Why to override clone method in Java
157906
When should I use the HashSet type?
51586
Using two (or more) objects as a HashMap key
13497
What is the best algorithm for overriding GetHashCode?
65609
Why does Java's hashCode() in String use 31 as a multiplier?
121512
Default implementation for Object.GetHashCode()
142913
How do you get the "object reference" of an object in java when toString() and hashCode() have been overridden?
89487
Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?