Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Java Java Objects Delivering the MVP Applying a Discount Code

Gabe Olesen
Gabe Olesen
1,606 Points

Was my code OK?

Hi All,

I just finished this challenge and I wanted to ask the community if my code was OK for this task and if I should of done it a different/better way?

private String normalizeDiscountCode(String code) {
    this.discountCode = code.toUpperCase(); 
    for (char letter : discountCode.toCharArray()) {
      if (Character.isDigit(letter) || letter == '@') {
        throw new IllegalArgumentException("Invalid discount code.");
      }
    }
    return discountCode;
  }
Ian Taylor
Ian Taylor
Courses Plus Student 1,420 Points

Hi Gabe your code worked for me. Thank you! Not sure if there is a better way. I tried this but it kept throwing the error for the $ sign. char[] chars = discountCode.toCharArray(); for (char c : chars){ if ( !(Character.isDigit('$')) && !(Character.isLetter(c))){
throw new IllegalArgumentException("Invalid discount code"); }