What is the function of the contains(Object o) and containsAll(Collection<?> c) methods from the Collection interface?
Answer: contains() returns true if the object is found in the collection, while containsAll returns true if all elements of the collection are found inside the original. For both of these methods, all elements and objects should implement the equals() method. In the case of sets, the hashCode() method should be implemented as well.
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Data Structures
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- What is the function of the hashCode() and deepHashCode() methods from the java.util.Arrays class?
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- What is the function of the compare(), mismatch(), equals() and deepEquals() methods from the java.util.Arrays class?
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