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Write a command line program, SOD, in Java that computes the sum of digits for a single integer argument > 0, subject to the following:
Write a command line program, SOD, in Java that computes the sum of digits for a single integer argument > 0, subject to the following:
1. The program must check for a correct argument.
2. It must print out according to the examples below.
3. It must include a method, doSOD(int i), that computes the sum of digits recursively.
Examples:
java SOD
Error: argument is missing.
java SOD 0
Error: 0 is an invalid argument.
java SOD 1234
Sum of digits of 1234 is 10.
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