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Difference between deep cloning and shallow cloning? The process of creating the exact duplicate object is called cloning. The main purpose of cloning is to maintain a backup copy and to preserve the state of an object. We can perform cloning by using clone() of the object class. We can . . . Read more
What is the Contract between equals and hashCode method If two objects are equals by .equals() then their hashCode must be equals. That is two equivalent object should have the same hashCode that is if r1.equals(r2) is true then r1.hashcode==r2.hashcode is always true. Object class .equals() method and hashCode() method . . . Read more
What is the Relation between equals() and (==) Operator? (==)Â operator is a binaryÂ operator in java which compares the two objects based on their location in the memory. That means if two reference variables are pointing to the same object in the memory then applying (==)Â operator on thoseÂ reference variables will return . . . Read more
Why do we have to override the equals() method in Java? We can use the equals method to check equality of two objects. The equals()Â method ofÂ java.lang.Object class acts the same as theÂ ==Â operator; that is, it tests for object identity rather than object equality. The implicit contract of theÂ equals()Â method, however, is . . . Read more
What is the meaning of hashCode in Java? For every object a unique number generated by JVM which is nothing but hashCode. Hashcode won’t represent an address of the object. JVM will use hashCode while saving the object into hashing related data structures like HashTable, HashSet, HashSet, etc.. The main . . . Read more