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 Basics Perfecting the Prototype Looping until the value passes

alex albas
seal-mask
.a{fill-rule:evenodd;}techdegree
alex albas
Front End Web Development Techdegree Student 2,190 Points

Sorry but i can't pass this challenge, some help?

Some help..may be i don't understand the joke..

KnockKnock.java
/*  So the age old knock knock joke goes like this:

    Person A:  Knock Knock.
    Person B:  Who's there?
    Person A:  Banana
    Person B:  Banana who?
    ...as long as Person A has answered Banana the above repeats endlessly
    ...assuming the person answers Orange we'd see
    Person B:  Orange who?
    ...and then the punchline.
    Person A:  Orange you glad I didn't say Banana again?
    (It's a really bad joke that makes it sound like "Aren't you glad I didn't say Banana again?")

    Let's just assume the only two words passed in from the console from Person B are either banana or orange.
*/

// ====BEGIN PROMPTING CODE====

// Person A asks:
console.printf("Knock Knock.\n");

// Person B asks and Person A's response is stored in the String who:
String who = console.readLine("Who's there?  ");

// Person B responds:

console.printf("%s who?\n", who);

// ==== END PROMPTING CODE ====
do {

  if (who.equalsIgnoseCase("banana")) {
  who = console.readLine("Who's there?  ");
      }
 else 
   console.printf("Orange who?  ");
} while (who.equalsIgnoseCase("banana"));

2 Answers

Rob Bridges
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Rob Bridges
Full Stack JavaScript Techdegree Graduate 35,459 Points

Hey Alex,

Nothing to be sorry about, this all appears confusing until it starts to make sense. What they're asking you to is put the entire joke in a while loop while loop until who equals "banana" so until the user passes banana, they'll keep it repeating, I see you have if and else statements in your code, really all you need is to wrap the 3 lines in a do while loop, and make it run until the condition where who is equal to banana.

it would look something like below.

String who;

do {
    console.printf("Knock Knock.");
    who = console.readLine("Who's there?  ");
    console.printf("%s who?", who);
} while (who.equalsIgnoreCase("banana"));

Let me know if this helps.

Craig Dennis
Craig Dennis
Treehouse Teacher

Should actually be something like :

console.printf("%s who?", who);
Rob Bridges
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Rob Bridges
Full Stack JavaScript Techdegree Graduate 35,459 Points

You are right again Craig, looks like I didn't pay close enough attention to what the challenge initially had when I gave my answer. Thanks for pointing that out.