All About Programming: Array Copy in Java

Overview of above methods:

Simply assigning reference is wrong
Array can be copied by iterative over array and one by one assigning elements.
We can avoid iteration over elements using clone() or System.arraycopy()
clone() creates a new array of same size, but System.arraycopy() can be used to copy from a source range to a destination range.
System.arraycopy() is faster than clone() as it uses Java Native Interface (Source : StackOverflow)

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