Why oh why do I even Try??

[Sam Smoot]

This code works within the eclipse editor, but not outside... What is missing in the main method?

<** I'm posting this here because it's gotta be a newbie mistake which I am overlooking.... **>

public class TestMain {

public void test1(){
System.out.println("test1");
}
 
public int testInts(int a){
int X = a * 20;
return X;
}

public static void main(String[] args) {
TestMain tm = new TestMain();
tm.test1();
System.out.println(tm.testInts(3));
}
}

***** Changed code to simpler example. still doesn't work. **********

Error from Console is still :

C:\JavaCode\Testing\jTesting>java TestMain
Exception in thread "main" java.lang.NoClassDefFoundError: TestMain (wrong name: jTesting/TestMain)
        at java.lang.ClassLoader.defineClass0(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$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)

[ May 12, 2005: Message edited by: Sam Smoot ]

[Srinivasa Raghavan]

What error you get when you run outside eclipse ?

[Neeraj Dheer]

"does not work" meaning? you get an exception?

[Sam Smoot]

Even more frustrating... This is what happens when I compile it outside of ANY IDE environment.

 
C:\JavaCode\Testing\jTesting>c:\j2sdk1.4.2_06\bin\javac -g -verbose TestMain.java
[parsing started TestMain.java]
[parsing completed 125ms]
[loading c:\j2sdk1.4.2_06\jre\lib\rt.jar(java/lang/Object.class)]
[loading c:\j2sdk1.4.2_06\jre\lib\rt.jar(java/lang/String.class)]
[checking jTesting.TestMain]
[loading c:\j2sdk1.4.2_06\jre\lib\rt.jar(java/lang/System.class)]
[loading c:\j2sdk1.4.2_06\jre\lib\rt.jar(java/io/PrintStream.class)]
[loading c:\j2sdk1.4.2_06\jre\lib\rt.jar(java/io/FilterOutputStream.class)]
[loading c:\j2sdk1.4.2_06\jre\lib\rt.jar(java/io/OutputStream.class)]
[wrote TestMain.class]
[total 735ms]
 
C:\JavaCode\Testing\jTesting>java TestMain
Exception in thread "main" java.lang.NoClassDefFoundError: TestMain (wrong name: jTesting/TestMain)
        at java.lang.ClassLoader.defineClass0(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$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)
 
C:\JavaCode\Testing\jTesting>
 

[Timmy Marks]

Is this class supposed to be in package jTesting?

The code itself is ok, so it is something else.

[miguel lisboa]

using command line:

 YourDir>java -cp . TestMain

and this post might help you
[ May 13, 2005: Message edited by: miguel lisboa ]

[Sam Smoot]

 
C:\JavaCode\Testing\jTesting>java -cp . TestMain
Exception in thread "main" java.lang.NoClassDefFoundError: TestMain (wrong name: jTesting/TestMain)
        at java.lang.ClassLoader.defineClass0(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$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)
 
C:\JavaCode\Testing\jTesting>
 

[miguel lisboa]

as Timmy said, are you sure you java file does not declare any package declaration?

[Sam Smoot]

Well, taking the package declarations out of the code did help, but Eclipse forces you to put those there.. Guess that's not an option now..

Thanks.

[miguel lisboa]

as far as i know eclipse has a default package, and else you van create any packages you want, and then keep in there your files, with respective package declaration;

for bigger projects (with several packages and many classes) compiling and running from eclipse (or any other IDE) is ok, but to run a single file is faster doing it with command line - you dont have to create a project, and all that...

[miguel lisboa]

of course you can allways compile and run a file that is inside a package:

 C:\javas>javac jTesting/TestMain.java
 
C:\javas>java jTesting.TestMain
test1
60
 
C:\javas> 

[Sam Smoot]

Yeah, and it doesn't like for you to use that one, either. I am just trying to get (re)used to the environment due to not being allowed to code for about 2 years, so I'm a little rusty. I have a couple of "Q&D" tools to do individual files, but this one will need to be jar'ed for a small group to have access to it, so I was trying to put them together and keep them related.

Thanks.

[Joel McNary]

If you have the package declaration, then you have to have the same directory structure underneath your classpath. That is, if you class is:

jTesting.TestMain,

then your command should be:

C:\JavaCode\Testing>java jTesting.TestMain

You were using:

C:\JavaCode\Testing\jTesting>java TestMain

(Note the difference in directory location and class name specified at the command prompt!)