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Java Java Objects (Retired) Delivering the MVP Validation

Posted by christian rylander
christian rylander
4,609 Points

Java

Why does'nt this Java code work?

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
    char one = fieldName.charAt(1);
    if(fieldName.charAt(0) != 'm' && !one.isUpperCase()) {
    throw new IllegalArgumentException();
    }
    return fieldName;
  }

}

1 Answer

hbdc
hbdc
13,725 Points

You need to call the method like this:

!Character.isUpperCase(one)

However there is further work with the logic of your expression, but I'll leave that to you as it's better to learn that way.

: )

christian rylander
christian rylander
4,609 Points

Thanks :)