How to make a number lower case?

Question

Write a program to convert uppercase numbers to lowercase numbers. You may use any part of the Java API but may not team together with other students and turn in group work. You must write the class and provide at least 5 methods but no more than 8 methods to accomplish this task. Your program must be able to accept arguments from the command line
public class MakeLowerCaseNumber
public MakeLowerCaseNumber(String[] args)
int i;
for (i =0; i < args.length; i++)
makeLower(args);
private void makeLower(String argument)
System.out.print("Making " + argument + " into a lowercase number ");
public static void main(String[] args)
MakeLowerCaseNumber makeLowerCaseNumber = new MakeLowerCaseNumber(args);
I am lost. I have written this much. It doesn't make my number lowercase. Can someone show me what to do?

Answer 1

You make a lower case number by adding the difference
return lowerChar +('a' - 'A');
So try doing the same for a number.That's one way. Since this is such a stupid assignment, I have a couple other suggestions:
For every number (which could be interpreted as each individual digit or each string of +/-, digits, and at most one decimal point, or even include scientific notation)...
1) ...just change that number to the string "lowercase numbers."
2) ...change the numbers to their spelled out equivalents (in lowercase, of course), e.g. "three", "forty-two"
3) ...since the assignment said, "convert uppercase numbers to lowercase numbers," you could interpret it as "If the number is uppercase, convert it to lowercase," and then start your processing code with Character.isUperCase(), which will return false every time.
4) ...as a variation on #3, just call to CharacterLowerCase() on each digit.
<editorial>
I hate teachers who think they're being clever and teaching students to "think outside the box" when they come up with nonsensical problems like this. They need a good smiting.
</editorial>