title: jar file wont execute, no main manifest attribute
body: <p>I have the following java classes and text document in a file:</p>
  
  <pre><code>Board.class
  BoardPanel.class
  Frame$ActionHandler.class
  Frame.class
  manifest.txt
  </code></pre>
  
  <p>Where <code>manifest.txt</code> contains:</p>
  
  <pre><code>Main-Class: Frame
  </code></pre>
  
  <p>But when I type the following commands:</p>
  
  <pre><code>&gt; jar cvfm gameOfLife.jar manifest.txt *.class
  &gt; java -jar gameOfLife.jar
  </code></pre>
  
  <p>It reports this error:</p>
  
  <pre><code>no main manifest attribute, in gameOfLife.jar
  </code></pre>
  
  <p>Have I got the wrong text in <code>manifest.txt</code>? Or is my error coming from something else?</p>