title: Cant compile and run java code in IntelliJ IDEA
body: <p>Using InteliJ IDEA version 12.1.6 I wanted to run the example from the Horstmann's 'Core Java' book:</p>
  
  <pre><code>public class Welcome
  {
      public static void main(String[] args)
      {
          String[] greeting = new String[3];
          greeting[0] = "Welcome to Core Java";
          greeting[1] = "by Cay Horstmann";
          greeting[2] = "and Gary Cornell";
  
          for (String g : greeting)
          System.out.println(g);
      }
  }
  </code></pre>
  
  <p>But I get the following error:</p>
  
  <pre><code>"C:\Program Files\Java\jdk1.7.0_45\bin\java" -Didea.launcher.port=7533 "-Didea.launcher.bin.path=C:\Program Files (x86)\IntelliJ IDEA\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.7.0_45\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\jce.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\jfxrt.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\resources.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\rt.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\zipfs.jar;C:\Program Files (x86)\IntelliJ IDEA\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain Welcome
  Exception in thread "main" java.lang.ClassNotFoundException: Welcome
      at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
      at java.lang.Class.forName0(Native Method)
      at java.lang.Class.forName(Class.java:190)
      at com.intellij.rt.execution.application.AppMain.main(AppMain.java:113)
  
  Process finished with exit code 1
  </code></pre>
  
  <p>At the same time when compiling and executing a file in the command line everything is working correctly. Excuse me for such a question, I just started learning Java. :)</p>