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POerror when trying to run application from command line: cannot find class
 

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    <p>I did a module in Java in college but we did it all using Eclipse. Now I'd like to go back and learn it but by using the command line.</p> <p>I set up a folder on my desktop, wrote out my application and saved it as 'MyFirstApp.java'. Here it is:</p> <pre><code>public class MyFirstApp { public static void main (String[] args) { System.out.print("Hello World!"); } } </code></pre> <p>I opened my command line, cd'd into the appropriate directory and then compiled by typing "javac MyFirstApp.java". This creates a file in the folder called "MyFirstApp.class".</p> <p>However when I try to run this by typing "java MyFirstApp" I get an error:</p> <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: MyFirstApp Caused by: java.lang.ClassNotFoundException: MyFirstApp at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) Could not find the main class: Share.class. Program will exit. </code></pre> <p>I also tried running by typing "java -cp.MyFirstApp" but then I get this error:</p> <pre><code>Unrecognised option: -cp.MyFirstApp Could not create the Java Virtual Machine </code></pre> <p>Is this likely to be a problem with my environmental variables? I don't really know much about all this stuff.</p>
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    1. USSperick
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    1. COThe problem is in your command line and the error message shows it explicitly. `Unrecognized option...`. Use `java -cp . MyFirstApp`
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      1. USkhachik
 

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