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Java Java Objects (Retired) Delivering the MVP Validation

andrew nelson
andrew nelson
3,416 Points

Not sure how to check if the second character in a string is an upper case? (Java)

Im getting a parameter "fieldName" and I have to check if the second letter is uppercase. What I tried was : fieldName.charAt(1).isUpperCase(); Also tried: fieldName.isUpperCase(fieldName.charAt(1)); and alsoooo: secondLetter = fieldName.charAt(1); secondLetter.isUpperCase();

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
    String testFieldName = fieldName.toUpperCase(fieldName.charAt(1));
      if(fieldName.charAt(0) == 'm' || fieldName.charAt(1) == testFieldName)
    return fieldName;
    } catch(IllegalArgumentException ex){


1 Answer

Rebecca Rich
Rebecca Rich
Courses Plus Student 8,592 Points

Try this:


isUpperCase is a static method in the Character class, so to access it, you have to call Character.isUpperCase(...)