Java System.arraycopy Method: Efficient Array Copying

System.arraycopy is a method in Java used to copy one array into another array. It's a static method, meaning it can be called directly on the System class without creating an instance.

The syntax of System.arraycopy is as follows:

System.arraycopy(Object sourceArray, int sourceStartIndex, Object destinationArray, int destinationStartIndex, int length)

• 'sourceArray': The array from which elements will be copied.
• 'sourceStartIndex': The starting index of the elements in the source array to be copied.
• 'destinationArray': The array to which elements will be copied.
• 'destinationStartIndex': The starting index in the destination array where elements will be copied.
• 'length': The number of elements to be copied from the source array to the destination array.

The System.arraycopy method is often used for efficient array copying, as it can handle both primitive data types and objects. It's faster than using a for loop to copy elements one by one.