title: Cannot Resolve symbol 'RelativeLayout'
body: <p>I'm trying to make a simple JFrame and there is no way to make any of several Java IDE to recognize the Class RelativeLayout. I already reinstalled the java JDK but no changes. Any help is appreciated. Any other symbol/class from swing works without problem.</p>
  
  <pre><code>import javax.swing.*;
  import java.awt.*;
  
  /**
   * Created by Yann on 21/09/2016.
   */
  
  public class MainWindow extends JFrame{
  
      private int dimX;
      private int dimY;
  
      private JPanel left_side;
      private JPanel center;
      private JPanel right_side;
  
      public MainWindow(){
  
      }
  
      public void initComponents(){
  
  
          RelativeLayout  layout = new RelativeLayout(this);
  
          this.getContentPane().setLayout(layout);
  
          Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
          this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          this.setTitle("MP4Tagger");
          this.setPreferredSize(new Dimension(this.dimX, this.dimY));
          this.setSize(new Dimension((int)dim.getWidth(),(int)dim.getHeight()));
  
          this.setLocation(dim.width/2-this.getSize().width/2, dim.height/2-this.getSize().height/2);
      }
  
  
  
  }
  </code></pre>