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    <p>Because I found these answers unclear, here is what you need to do. First, if you package your code (IE your classes have the <code>package</code> keyword at the top) the compiled classes have to be in a directory with the same name as your package declaration in code. After you have compiled your classes, you need to <strong>move up a directory when you exectute the java command</strong>, and you <strong>include the name of the package</strong>. For example, if your code exists in <code>/myFolder/myPackage/</code> , and your class starts with <code>package myPackage</code> (note that the directory and the package are the same name), then you would do the following (linux / osx):</p> <pre><code>cd /myFolder/myPackage javac MyClass.java cd .. java myPackage.MyClass </code></pre> <p>Edit - A late edit to clarify something I see people get confused on. In the example above, the package is only one deep, meaning its just myPackage. If you code has a larger package, like</p> <pre><code>package com.somedomain.someproject; </code></pre> <p>you will need to execute the java command from the directory which contains the root directory for that package. For example if your compiled code is in myCode/com/somedomain/someproject/MyMainClass.class, then you will execute the java command from the myCode folder, like this (Again, take special note that the directory structure is the same as the package declaration):</p> <pre><code>cd /myCode java com.somedomain.someproject.MyMainClass </code></pre>
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    1. POReceiving "wrong name" NoClassDefFoundError when executing a Java program from the command-line
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    1. COthank you very much :D I was getting crazy to figure out what the hell was wrong with it since no compiling error were shown
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