Java Learning Note--arrays

Arrays Common methods

Arrays.tostring (int[] a) method-------> Return type is string, which can be used to produce a printable representation of an array, avoiding the use of loops to read the array values sequentially to print

Arrays.sort (int[] a) method-------> used to sort the array

Arrays.fill (int[] A, int val) method-------> used to populate an array with a Val value

Arrays.copyofrange (int[] original, int from, int to) method-------> Copy an array from the from (including) to the to (not included) position

Arrays.copyof (int[] original, int newlength) method-------> truncate or enrich array (complement 0)

Arrays.binarysearch (int[] A, int key) method-------> Find key using binary method

Arrays.aslist (T ... a) method-------> Converts a Continuous object or base type to a list, such as Arrays.adlist (1,2,3,4), but in this case the underlying representation is an array, so the dimension cannot be resized. If you try to add a delete element by using either the Add () or delete () method, you get a "unsupported operation" error.

See the API documentation for specific usage.

Java Learning Note--arrays