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Java Java Objects (Retired) Delivering the MVP Validation

Kiran Varma
Kiran Varma
2,861 Points

Looks like syntax error at throw new IllegalArgumentException

throw new IllegalArugumentException("doesnt start with m"); ^ symbol: class IllegalArugumentException location: class TeacherAssistant 1 error

This is the error i get....

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.indexOf('m') != 0 && ! Character.isUpperCase(fieldName.charAt(1))) {
      throw new IllegalArugumentException("doesnt start with m"); 
    } else {
      return fieldName;
    }
  }

}

2 Answers

Loris D'Antonio
PLUS
Loris D'Antonio
Courses Plus Student 10,155 Points

There's a typos mistake:

IllegalArugumentException

Instead of

IllegalArgumentException

There's also a logic mistake, take a look at the control statement you wrote:

You're saying: "if first char of fieldName is 'm' and second char is not uppercase, then raise an error" In order to satisfy the second point, you should replace with logical or ||

    if( fieldName.indexOf('m') != 0 || ! Character.isUpperCase(fieldName.charAt(1))) {
      throw new IllegalArgumentException("doesnt start with m"); 
    } else {
      return fieldName;
    }
Kiran Varma
Kiran Varma
2,861 Points

Thanks, Loris. I guess i will take a break now, I am doing silly mistakes :).