Program runs in Eclipse, doesn't run at command line

Question

Hey I wrote a simple program in Eclipse:

package hw;

public class Assignment02Q01Sec01 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        if (args.length == 0) {
            System.out.println("No arguments!");
            return;
        }
        System.out.println(args[args.length - 1].charAt(args[args.length -1].length() - 1));
    }

}

It runs fine when selecting the 'Run' menu in Eclipse but fails when running from command line:

c:\Users\ghostcow\workspace\hw\bin\hw>java Assignment02Q01Sec01
Exception in thread "main" java.lang.NoClassDefFoundError: Assignment02Q01Sec01
(wrong name: hw/Assignment02Q01Sec01)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(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 sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

What am I doing wrong?

NOTE: I'm in my class path in cmd, and '.' is included in the CLASSPATH env variable, i checked.

EDIT: Thanks, problem solved.

I assume you did properly compile it first with the "javac" command? — Voidpaw
– Voidpaw, Commented Oct 31, 2013 at 8:47
Simple - javac Assignment02Q01Sec01.java and then java Assignment02Q01Sec01 — Vishnu Prasad Kallummel
– Vishnu Prasad Kallummel, Commented Oct 31, 2013 at 8:48
@Voidpaw - I think he did compile it with eclipse. So the answer from David Wallace, Kayaman, Vivek is correct — Vishnu Prasad Kallummel
– Vishnu Prasad Kallummel, Commented Oct 31, 2013 at 8:51

Dawood ibn Kareem · Accepted Answer · 2013-10-31 08:47:45Z

2

cd \Users\ghostcow\workspace\hw\bin\
java hw.Assignment02Q01Sec01

answered Oct 31, 2013 at 8:47

Dawood ibn Kareem

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Comments

Kayaman · Accepted Answer · 2013-10-31 08:47:46Z

1

You need to run it from bin, not bin\hw as java hw.Assignment02Q01Sec01.

answered Oct 31, 2013 at 8:47

Kayaman

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Vivek Viswanathan · Accepted Answer · 2013-10-31 08:48:06Z

0

You have to run it as

java hw.Assignment02Q01Sec01

You have to provide the fully qualified class name and run from bin folder.

answered Oct 31, 2013 at 8:48

Vivek Viswanathan

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Simon · Accepted Answer · 2013-10-31 09:07:16Z

0

Java program must be run with qualified name of the main class. In this situation, it should be "java hw.Assignment02Q01Sec01 directly outside directory hw(compiled class, not source code)

answered Oct 31, 2013 at 9:07

Simon

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