Help coderanch get a
new server
by contributing to the fundraiser
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Unable to grasp compiling and running multiple files

 
Ranch Hand
Posts: 434
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hello,

I am going through Sierra/Bates code and am looking at chapter 1.

Created two java files in the same directory:

Beverage.java



Tea.java




I am able to compile Beverage.java. However, I get error when I run Beverage.java

Exception in thread "main" java.lang.NoClassDefFoundError: Beverage (wrong name: cert/Beverage)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:698)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:315)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330)
at java.lang.ClassLoader.loadClass(ClassLoader.java:250)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:398)




When I compile Tea.java, I get errors

Tea.java:2: package cert does not exist
import cert.Beverage;
^
Tea.java:4: cannot find symbol
symbol: class Beverage
class Tea extends Beverage { }
^
2 errors




Is this something that will be covered later in Sierra/Bates book. From what I understand, Tea.java should not compile because Beverage is not public. However, I am unable to test this out because I cannot even run Beverage.java.

Thanks!

 
Rancher
Posts: 43081
77
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
If your classes are in packages, then they need to be in specific directories that correspond to the package hierarchy. This is probably covered somewhere in the book, but in case it's not, start reading at http://java.sun.com/docs/books/tutorial/java/package/index.html, particularly "Managing Source and Class Files".
 
Sandra Bachan
Ranch Hand
Posts: 434
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I just realized it's covered in chapter 10 of Sierra/Bates; will check out the link as well.
 
I can't beleive you just said that. Now I need to calm down with this tiny ad:
We need your help - Coderanch server fundraiser
https://coderanch.com/t/782867/Coderanch-server-fundraiser
reply
    Bookmark Topic Watch Topic
  • New Topic