Re: Problem with commandline compile
NoSpam@aol.com wrote:
I have been using Windows XP & the latest version of NetBeans to compile
simple Java programs as I am learning the languages. I just tried to do a
command line compile & execute and I cannot get it to work so I wend back
to the "Hello World" program with the same result. Here is the program,
the commands I tried, and the error result:
The program file contains:
class HelloWorldApp {
public static void main(String[] args) {
System.out.println("Hello World!");
}
}
The Commands:
To Compile: javac k:\HelloWorldApp.java (This worked)
To Execute: java k:\HelloWorldApp (This failed)
The Result:
Exception in thread "main" java.lang.NoClassDefFoundError: k:\HelloWorldApp
Caused by: java.lang.ClassNotFoundException: k:\HelloWorldApp
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)
I also tried java K:\NonExistantFile which, of course, failed but with
different errors than the above so it must be finding the .class file but
doesn't like something in it.
What am I doing wrong? Thanks!
Because the path to the class file is all tied up with its package. A
simple fix for your problem is;
java -cp k:\ HelloWorldApp
I don't think there is a way to put the Windows drive letter into your
package name. This isn't a problem on Linux as there are no drive
letters. Probably the only time you are going to see this is if you
have a class in the default package on another drive from your current one.
--
Knute Johnson
email s/nospam/knute2009/
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