comile with package

[javastuden]

hi,
how this program will compile and run WITH OUT ANY IDE
put this code in a notepad name it First.java then the step of compilatin
start>>>run>>>cmd
cd e:
E:/>javac First.java
E:/>java First

the output will be
Exception in thread "main" java.lang.NoClassDefFoundError: First (wrong name: fi
rst/First)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknow n Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: First. Program will exit.

then how the packge is forming by the ide or even the jcreator on the compilation
thanks for advices

package first;
class First{
public static void main(String ar[]){

System.out.println("Hello world");
}

}

[r035198x]

The IDE creates the required folders for those packages. You need to do the same thing.

[[RaIdEn]]

The IDE creates it..because it creates a subdirectory named first and stores the java file in that subdirectory .

---------------------------If you want to read abt Packages.------------------------------------------------

If package name is specified, the file must be in a subdirectory called name (i.e., the directory name must match the package name).

here for an example.

Assume that you are working in a directory called Javadir, and that you create four files, whose contents are shown below.

file 1
package ListPkg;
public class List { ... }
class ListNode {...}

file 2
package ListPkg;
public class NoNextItemException { ... }


file 3
public class Test { ... }
class Utils { ... }

file 4
class Test2 { ... }
Here are the directories and file names you must use:
File 1 must be in a subdirectory named ListPkg, in a file named List.java.
File 2 must also be in the ListPkg subdirectory, in a file named NoNextItemException.java.
File 3 must be in a file named Test.java (in the Javadir directory).
File 4 can be in any .java file (in the Javadir directory).


---------------------------If you want to read abt Packages.------------------------------------------------

this would work perfect for your respective command line prompts provided java file is in the correct path .

class First{
public static void main(String args[]){

System.out.println("Hello world");
}

}