Arrays and Stuff

• Array slice

  import java.util.Arrays.copyOfRange;
    
  // function definition
  // first parameter is a template, can be any type of array
  public static int[] copyOfRange(int[] originalArray, int fromIndex, int toIndex);
    
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  	int arr[] = { 12, 13, 14, 15, 16, 17, 18 };
  	int copy[] = Arrays.copyOfRange(arr, 2,6);
  	int copy1[] = Arrays.copyOfRange(arr, 4, arr.length+3);
  

  1. The initial index i.e(from_index) must lie within 0 to original_array.length

  2. The final index i.e(to_index) can be greater than or equal to length of original array.
  3. In case it is greater than the original Array then 0’s is assigned to the copy whose index is greater than or equal to original.length – from.
  4. Return array has length of will be to-from