Re: [java programming] Problem with packages homework

Lautaro Maccio Fri, 12 Mar 2010 19:23:25 -0800

Hi Saidamin,
        
        I  tested your java program's and it work with the Mehul Sanghvi 
solution:
java -classpath ""  foodpackage.fruitpackage.FoodMain


Good done

Lautaro

El 12/03/2010 04:35 p.m., [email protected] escribió:

Hi Saidamin

      I think the problem lies in that, the JVM cannot find the .class to run
Try this:

    java -cp . classes.foodpackage.fruitpackage.FoodMain

I hope it works:

Bye:

Martín H.

Hi guys,

I have a problem with package. Could you please tell me what is going
wrong.
I have created
     "C:\Work\JAVA\src\foodpackage\fruitpackage" directory
     "C:\Work\JAVA\classes\foodpackage\fruitpackage" directory

In "C:\Work\JAVA\src\foodpackage\fruitpackage", there is two files
Food.java and FoodMain.java

Food.java

package foodpackage.fruitpackage;
public class Food {
     private String message = "";
     public void setMessage(String xMessage){
         this.message = xMessage;
     }
     public String getMessage(){
         return this.message;
     }
     public void showMessage(){
         System.out.println(this.message);
     }
}


FoodMain.java

package foodpackage.fruitpackage;
public class FoodMain{
     public static void main(String[] args){
        Food food;
        food = new Food();
        food.setMessage("Test");
        food.showMessage();
     }
}

I have compiled java source files using following commands:

C:\Work\JAVA>javac -d classes -classpath ""
src\foodpackage\fruitpackage\*.java


Both Food.java and FoodMain.java files compiled and both FoodMain.class
files are in "C:\Work\JAVA\classes\foodpackage\fruitpackage" directory

but when I trying to run using the following command I am getting an error

C:\Work\JAVA\classes>java -classpath "" foodpackage\fruitpackage\FoodMain

Exception in thread "main" java.lang.NoClassDefFoundError:
foodpackage\fruitpack
age\FoodMain (wrong name: foodpackage/fruitpackage/FoodMain)
         at java.lang.ClassLoader.defineClass1(Native Method)
         at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
         at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
         at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
         at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
         at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
         at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
         at java.security.AccessController.doPrivileged(Native Method)
         at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: foodpackage\fruitpackage\FoodMain.
Program will exit.


Any suggestion???

Thank you in advance,
Saidamin Usmanov

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Re: [java programming] Problem with packages homework

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