What's the difference of hashCode() and equals()?
878
What issues should be considered when overriding equals and hashCode in Java?
113423
Why Java does not see that Integers are equal?
68500
hashCode() for an array of objects for use in HashMap
100132
What does the "+=" operator do in Java?
53664
What's the difference between equal?, eql?, ===, and ==?
143044
Object.hashCode() algorithm
665
Which equals operator (== vs ===) should be used in JavaScript comparisons?
154199
Why are XOR often used in java hashCode() but another bitwise operators are used rarely?
113187
Comparing Java enum members: == or equals()?
108111
Use Objects.hash() or own hashCode() implementation?
134742
String comparison in Python: is vs. ==
33772
Is there any difference in equals and == for String variables?
70078
Java two equal signs in one statement?
131933
On the usage of Java equality operator
47947
Is Object.GetHashCode() unique to a reference or a value?
148619
Is there a reason not to use  (null safe equals operator) in mysql instead of =?
32886
What is the difference between != and =! in Java?