title: "Could not find or load main class" What does this mean?
body: <p>I have never programmed with Java before. I tried making a <code>HelloWorld</code> program, following instructions from  a website. This is what my program looks like:</p>
  
  <pre><code>import java.applet.*;
  import java.awt.*;
  
  public class HelloWorld extends Applet
  {
    public void paint (Graphics g)
    {
      g.drawString("Hello World!", 50, 25);
    }
  }
  </code></pre>
  
  <p>Whenever I launch it, it says:</p>
  
  <pre><code>Could not find or load main class C:\Users\Leigh\Desktop\programs\Programming\HelloWorld.java`
  </code></pre>