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BJP3 Exercise 12.14: evenDigits

Language/Type: Java mod recursion recursive programming
Author: Whitaker Brand (on 2013/04/01)

Write a method evenDigits that accepts an integer parameter n and that returns the integer formed by removing the odd digits from n. The following table shows several calls and their expected return values:

Call Valued Returned
evenDigits(8342116); 8426
evenDigits(4109); 40
evenDigits(8); 8
evenDigits(-34512); -42
evenDigits(-163505); -60
evenDigits(3052); 2
evenDigits(7010496); 46
evenDigits(35179); 0
evenDigits(5307); 0
evenDigits(7); 0

If a negative number with even digits other than 0 is passed to the method, the result should also be negative, as shown above when -34512 is passed. Leading zeros in the result should be ignored and if there are no even digits other than 0 in the number, the method should return 0, as shown in the last three outputs.

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This is a method problem. Write a Java method as described. Do not write a complete program or class; just the method(s) above.

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