title: My eclipse is not being able to read the Standard library?
body: <p>I wrote this code: </p>
  
  <pre><code>public class CheckerBoard { 
  
      public static void main(String[] args) {
          // declaration and initialization - How big?
          int N = Integer.parseInt(args[0]);
          StdDraw.setXscale(0, N);
          StdDraw.setYscale(0, N);
  
          // Draw from lower left, up and across
          // i is the index for the x value.  j is the index for y.
          for (int i = 0; i &lt; N; i++) {
              for (int j = 0; j&lt;N; j++) {
                  if ( ((i+j) % 2)==0){ 
                       StdDraw.setPenColor(StdDraw.BLACK);
                  else StdDraw.setPenColor(StdDraw.RED);
                  StdDraw.filledSquare( 1, 1 , 0.5);
              }
          }
  
          StdDraw.show();
      }
  </code></pre>
  
  <p>And it shows in the result:</p>
  
  <pre><code>StdDraw cannot be resolved
  at CheckerBoard.main(CheckerBoard.java:15)
  </code></pre>
  
  <p>I already added the std.lib in the window-preferences- java thing. Does anyone know what the problem here is?</p>