Looks like you missed an important section of the tutorial:
-------- excerpt ----------- We do need a basic GameOver page. src/main/webapp/WEB-INF/GameOver.html: <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";> <head> <title>Game Over!</title> </head> <body> <h1>Game Over</h1> <p> You guessed the secret number! </p> </body> </html> src/main/java/org/apache/tapestry/tutorial/pages/GameOver.java: package org.apache.tapestry.tutorial.pages; public class GameOver { } With this in place, we can make guesses, and get feedback from the application: ------------ /Serge Robert A. Decker-2 wrote: > > I'm teaching myself Tapestry by jumping right into version 5. I'm a > pretty experienced developer and so I'm not ready to give up and go > back to version 4, but I am having what is probably a very basic > problem... > > I'm trying to do the Tapestry 5 tutorial and I'm on the section where > we count the number of guesses on Guess page page: > http://tapestry.apache.org/tapestry5/tutorial1/hilo.html > > The tutorial doesn't fully cover what should be in Guess.java > > This method: > Object onActionFromLink(int guess) { > _count++; > if (guess == _target) { > _gameOver.setup(_count); > return _gameOver; > } > > if (guess < _target) > _message = String.format("%d is too low.", guess); > else > _message = String.format("%d is too high.", guess); > > return null; > } > > GameOver is another page in the app. Not knowing exactly what I > should do, I have declared as a variable in Guess.java: > @InjectPage > GameOver _gameOver; > > > However, this is leading to a NullPointerException, which kind of > makes sense because GameOver isn't persisted. So, I tried: > @InjectPage @Persist > GameOver _gameOver > > But that doesn't fix the problem, and documentation I found in > Tapestry 4 seems to say that you can't declare multiple injection > tags per variable. > > Does anyone have a working Tapestry 5 tutorial? Or can help me with > this specific problem? > > I've also tried something like: > GameOver _gameOver = new GameOver(); > _gameOver.setup(_count); > return _gameOver; > > (the WebObjects way) but that leads to an even weirder exception... > > Thanks, > Robert A. Decker > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/-T5--tutorial-question-tf4487116.html#a12804208 Sent from the Tapestry - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
