title: Add KeyListener to Jframe issue
body: <p>I have a jframe of which I have made in Netbeans, this jframe is being "launched" by another java class, but for the current question that doesn't matter. What matters is the fact that I can't seem to figure out how to add my key listener to this jframe of mine. I have implemented the key listener, added the required functions (key typed, key pressed and key released). But I can't figure out how to actually add/initiate the actual key listener, to make it work. </p>
  
  <p>As of right now I have tried two different things, first I have tried to add the line <code>addKeylistener(new JFrameList());</code> in the start of the code, where the actual jframe is being initiated, but doing so the actual frame won't even show. Apart from this I have tried to add the same line within another function <code>callJframFForm()</code>, which is called from another class at the same time as the jframe is called. But this just returns the error <code>non-static method addKeyListener(KeyListener) cannot be referenced from a static context</code>. I am not sure what other ways I could add the key listener and thus am looking for a little help. </p>
  
  <p>Currently my code looks like the one below. </p>
  
  <pre><code>import java.awt.event.KeyEvent;
  import java.awt.event.KeyListener;
  
  public class JFrameList extends javax.swing.JFrame implements KeyListener{
  
      public static String keyPresCod = "";
  
      public JFrameList() {
          initComponents();
          addKeyListener(new JFrameList()); //This is where I am currently trying to call from, but frame won't show
      }    
  
      public static void main(String args[]) {
          /* Create and display the form */
          java.awt.EventQueue.invokeLater(new Runnable() {
              public void run() {
                  new JFrameList().setVisible(true);
              }
          });  
      }                                                
  
      // Variables declaration - do not modify                    
      private javax.swing.JButton jButton1;
      private javax.swing.JButton jButton2;
      private javax.swing.JLabel jLabel1;
      private javax.swing.JLabel jLabel2;
      // End of variables declaration                  
  
      static void callJframFForm(){
          try {
              //This is where I have also tried to add the initialization line
          } catch(Exception e) {
              e.printStackTrace();
      }
      }
  
      @Override
      public void keyTyped(KeyEvent e) {
          int codeFKey = e.getKeyCode();
  
          if (codeFKey == KeyEvent.VK_A) {
              System.out.println("Button A clicked");
                          keyPresCod = "A";
          } else if (codeFKey == KeyEvent.VK_B) {
              System.out.println("Button B clicked");
                          keyPresCod = "B";
          } else {
              System.out.println("Different key pressed");
                          keyPresCod = "Another key";
          }
      }
  
      @Override
      public void keyPressed(KeyEvent e) {
  
      }
  
      @Override
      public void keyReleased(KeyEvent e) {
  
      }
  
  }
  </code></pre>