Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Objects (Retired) Delivering the MVP Validation

andrew nelson
andrew nelson
3,416 Points
Posted by 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();

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
    String testFieldName = fieldName.toUpperCase(fieldName.charAt(1));
    try{
      if(fieldName.charAt(0) == 'm' || fieldName.charAt(1) == testFieldName)
    return fieldName;
    } catch(IllegalArgumentException ex){
      System.out.print("Wrong");
    }
  }

}

1 Answer

Rebecca Rich
PLUS
Rebecca Rich
Courses Plus Student 8,592 Points
Rebecca Rich
Rebecca Rich
Courses Plus Student 8,592 Points

Try this:

Character.isUpperCase(fieldName.charAt(1))

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