1 ( Rename files ) Suppose you have a lot of files in a directory named Exercise i _ j , where i and j are digits. Write a program that pads a 0 before i if i is a single digit. For example, a file...

1 (Rename files) Suppose you have a lot of files in a directory named Exercisei_j, where
i
and
j
are digits. Write a program that pads a 0 before
i
if
i
is a single digit. For example, a file named Exercise2_1 in a directory will be renamed to

Exercise02_1. In Java, when you pass the symbol * from the command line, it refers to all files in the directory (see Supplement III.V). Use the following command to run your program. java Exercise12_28 *

2 (Rename files) Suppose you have a lot of files in a directory named Exercisei_j, where
i
and
j
are digits. Write a program that pads a 0 before
j
if
j
is a single digit. For example, a file named Exercise2_1 in a directory will be renamed to Exercise2_01. In Java, when you pass the symbol * from the command line, it refers to all files in the directory (see Supplement III.V). Use the following command to run your program. java Exercise12_29 *