Checking Characters Case 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 new IllegalArgumentException("The first letter m is required");
        } 

    if (Character.isLetter(fieldName.charAt(1)) == true && Character.isUpperCase(fieldName.charAt(1)) == false) {
    throw new IllegalArgumentException("Capital Letter Needed");
    } else if (Character.isLetter(fieldName.charAt(2)) == true && Character.isUpperCase(fieldName.charAt(2)) == false) {
    throw new IllegalArgumentException("Capital Letter Needed");
    }

    return fieldName;
  }

}