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.

Android Build a Simple Android App with Java Basic Android Programming Using the Random Class

Abdulraheem Bakare
Abdulraheem Bakare
809 Points

what am i doing wrong

i did everything right but it dosent work

RandomTest.java
Random randomGenerator = new Random();
int randomNumber = randomGenerator.nextInt( n: 9);

1 Answer

Maciej Czuchnowski
Maciej Czuchnowski
36,437 Points

Two things:

1) do not name the argument in the nextInt method. Just pass an integer, without naming it n:.

2) 9 as an argument will select numbers from 0 to 8 (9 different integers). You want numbers between 0 and 9 (10 different integers).

Maciej Czuchnowski
Maciej Czuchnowski
36,437 Points

You should consider doing the Java course on Treehouse and then get back to Android development - Android deveolpment in these courses here heavily relies on knowledge of programming principles in Java.