title: System could not be resolved or is not a field
body: <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>import java.util.Scanner;
  
  public class problem6
  {
   public static void main(String[] args)
   {
    System.out.println("Please enter an integer:");
  
    Scanner keyboard = new Scanner(System.in);
    int number = keyboard.nextInt( );
  
    if (number &gt;= 100) ll (number &gt;= 50 &amp;&amp; number &lt;= 75)
    System.out.println("YES"); //here is the error
    else
     System.out.println("NO");
   }
  
  
   private static Object ll(boolean b) {
    return null;
   }
  
  }
  
  ​</code></pre>
  </div>
  </div>
  </p>
  
  <p>I don't understand why but eclipse made me insert "private static object...in order to use the "or" (ll) in my program</p>