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Java Java Objects (Retired) Delivering the MVP Validation

Delivering MVP stage1 validation question unable to find the error messgaes

I am unable to see any error messages in the preview screen but whenever i check my work it keeps saying that there is some error. Not able to clear the challenge coz of no error messages. any solution??

TeacherAssistant.java
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
    if(fieldName.charAt(0)!='m')
    {
      throw IllegalArgumentException("should start with m");
    }
    if(!isUpperCase(fieldName.charAt(1)))
    {
      throw IllegalArgumentException("second char has to be Uppercase");
    }
    return fieldName;
  }

}

2 Answers

Erin Leathers
Erin Leathers
3,562 Points

Character.isUpperCase is also seems to be missing in your code above.

Craig Dennis
STAFF
Craig Dennis
Treehouse Teacher

Hmmm...seems like you should be throwing a new exception.

Hope that hint helps!

Craig Dennis : Thank you for your response. I ve tried including new as well and i just tried it thrice again with new. And sorry while posting i missed out new somehow. But still no its not clearing the challenge :( like i ve made a 100 trials already and i am not receiving any error messages. its a blank 'preview' screen

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 if(fieldName.charAt(0)!='m') { throw new IllegalArgumentException("should start with m"); } if(!isUpperCase(fieldName.charAt(1))) { throw new IllegalArgumentException("second char has to be Uppercase"); } return fieldName; }

}