my code compiling but not running

[girishkumar]

i am trying to run this simple code but this should be in package girish which is on desktop

i want this program to work but package girish should be on desktop
and error also is given below...

i pass input through command line parameters


ANY SUGGESTIONS



package girish;



class Greeter
{


String name;

Greeter(String n)
{
this.name=n;
}

public String sayHello()
{
String s="Hello";
String f=s+" "+this.name;
return f;
}
public static void main(String[] args)
{

Greeter g=new Greeter(args[0]);
System.out.println(g.sayHello());
}


}





Exception in thread "main" java.lang.NoClassDefFoundError: Greeter
Caused by: java.lang.ClassNotFoundException: Greeter
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)

[JosAH]

The fully qualified name of your class is girish.Greeter and the class file should be stored in a directory "girish" somewhere. Also read about the classpath variable.

kind regards,

Jos

[gcalvin]

What JosAH said, and also, you need to run "java girish/Greeter <args>" and not "java girish/Greeter.class <args>".

-Gary-

[girishkumar]

my classpath file is set and class files comes to directory girish itself...
but still not running


y should i give full path like "java girish/Greeter" name when everything is set

[JosAH]

my classpath file is set and class files comes to directory girish itself...
but still not running


y should i give full path like "java girish/Greeter" name when everything is set

Suppose your directory "girish" is a subdirectory of directrory "X", so your class file can be found in /X/girish/Greeting.class. Your classpath variable is supposed to contain "X" when you want to run your class girish.Greeting. e.g. the following command will do the job:

java -cp /X girish.Greeting

kind regards,

Jos

[girishkumar]

u mean to say when i run each class file i should give full path name like



"java -cp C:\Documents and Settings\giri\Desktop\girish\Greeter"

[girishkumar]

if i remove my package statement it works but i want to create packages and want to specify in java files..

[gcalvin]

Read this:

Managing Source and Class Files (The Java™ Tutorials > Learning the Java Language > Packages)

And read the five pages leading up to that one too. Also, read again what JosAH said.

-Gary-

[JosAH]

u mean to say when i run each class file i should give full path name like



"java -cp C:\Documents and Settings\giri\Desktop\girish\Greeter"

No,I didn't mean that; your fully qualified class name is girish.Greeter; it can be found as a subdirectory of directory X, i.e. /X/girish/Greeter.class so your command line should look like this:

java -cp /X girish.Greeter

kind regards,

Jos

[girishkumar]

@JoSAH and @gcalvin

Thanku for ur support
finally i understood it...

thanku thanku thanku

[girishkumar]

but i have to give java girish\Greeter to run ..
what if i have hierarchy of packages like X/Y/Z then i have to give "java X/Y/Z/*.class"
to run

is there any shortcut to run

[j2me64]

is there any shortcut to run

sure.

1. you can build a jar file Using JAR Files: The Basics (The Java™ Tutorials > Deployment > Packaging Programs in JAR Files) so that you can start your java app with java -jar app.jar or

1. you can create a shortcut from your os that executes "java X/Y/Z/app". put the shortcut on the desktop so you can start it with a doubleclick or in a directory in the systempath, so you can call your shortcut from everywhere. but remember: don't add the extension class to the classfile when you call java!

any other suggestions?

[girishkumar]

@j2me64

i just wanted to show i am running class file so i put class extension there

[girishkumar]

You have two choices at this point: change directories up one level and try java test.PackTest, or add the top of your development class hierarchy to the CLASSPATH environmental variable. Then you will be able to use java test.PackTest from any directory, and Java will find the right .class file. For example, if you are working on your source code in a directory called C:\\myjava, then set your CLASSPATH to .;C:\\myjava;C:\\java\\classes


Can anyone explain whats the second part exactly means..

add the top of your development class hierarchy to the CLASSPATH environmental variable.

pls if u can explain with respect to my example..
my package is on desktop

[j2me64]

add the top of your development class hierarchy to the CLASSPATH environmental variable.

afaik: when you specify a subdirectory, you are NOT specifying the directories above it, so they will not be searched for classes. so if you want this, add the top of your directory to the CLASSPATH environmental variable or with -classpath <topofyourdirectory>. for detail, see my pm.

[girishkumar]

thanku j2me64 for pm


kind regards
GIRI

[girishkumar]

ya good one..
really good
thanku for that

ya u can delete it...

kind reards
GIRI