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Botan Abdullah
Courses Plus Student 2,940 Pointsshould I use "if" statement and throw an exception outside the "if" statement? It never worked for me.
I tried solving this question, but never worked for me, should I use the throw outside or inside an "if" statement?
public class TeacherAssistant {
public static String validatedFieldName(String fieldName) {
// These things should be verified:
// 1. Member fields must start with an 'm'
// 2. The second letter in the field name must be uppercased to ensure camel-casing
// NOTE: To check if something is not equal use the != symbol. eg: 3 != 4
return fieldName;
}
}
2 Answers
William Li
Courses Plus Student 26,868 Pointsshould I use the throw outside or inside an "if" statement?
You definitely should throw exception inside the if condition check.
// 1. Member fields must start with an 'm'
// 2. The second letter in the field name must be uppercased to ensure camel-casing
Check for these 2 conditions in your if statement, then throw exception.
If you're having trouble writing the if clause, here's one way to do it
if (fieldName.charAt(0) != 'm' || !Character.isUpperCase(fieldName.charAt(1)))
The rest should be easy.
Jess Sanders
12,086 Pointsprivate char validateGuess(char letter) {
if (!Character.isLetter(letter)) {
throw new IllegalArgumentException("A letter is required."
}
letter = Character.toLowerCase(letter);
if (mMisses.indexOf(letter) >= 0 || mHits.indexOf(letter) >= 0) {
throw new IllegalArgumentException(letter + " has already been guessed") }
return letter;
}
- The above code is the example to follow.
- We care about charAt for this challenge, rather than indexOf
- In pseudocode, we want to check for the following condition, and throw an error: " if the character at index 0 of fieldName does not equal 'm' OR the character at index 1 of fieldName is not upper case"
Botan Abdullah
Courses Plus Student 2,940 PointsBotan Abdullah
Courses Plus Student 2,940 PointsThis worked for me, I don't know how I couldn't think of using the "Character" object. Thanks for your help.