title: org.jdesktop.application package doesn't exist
body: <p>I was building a java desktop application from few days and all was going well.</p>
  
  <p>But today, when I opened the Netbeans and compiled a file, the following compilation error occrured:</p>
  
  <pre><code>Compiling 9 source files to C:\Documents and Settings\Administrator\Desktop\EMS\build\classes
  C:\Documents and Settings\Administrator\Desktop\EMS\src\ems\EMSAboutBox.java:7:             package org.jdesktop.application does not exist
  import org.jdesktop.application.Action;
  C:\Documents and Settings\Administrator\Desktop\EMS\src\ems\EMSApp.java:7: package org.jdesktop.application does not exist
  import org.jdesktop.application.Application;
  C:\Documents and Settings\Administrator\Desktop\EMS\src\ems\EMSApp.java:8: package org.jdesktop.application does not exist
  import org.jdesktop.application.SingleFrameApplication;
  C:\Documents and Settings\Administrator\Desktop\EMS\src\ems\EMSApp.java:13: cannotfind symbol
  symbol: class SingleFrameApplication
  public class EMSApp extends SingleFrameApplication {
  
  C:\Documents and Settings\Administrator\Desktop\EMS\src\ems\EMSView.java:7: package org.jdesktop.application does not exist
  import org.jdesktop.application.Action;
  C:\Documents and Settings\Administrator\Desktop\EMS\src\ems\EMSView.java:8: package org.jdesktop.application does not exist
  import org.jdesktop.application.ResourceMap;
  C:\Documents and Settings\Administrator\Desktop\EMS\src\ems\EMSView.java:9: package org.jdesktop.application does not exist
  </code></pre>
  
  <p>I was using the same code before but no error occured like this. When I checked the libraries, then the org.jdesktop.application package is there and when we import that package, the netbeans show the "application" package in suggestion.</p>
  
  <p>Then why the error is there when the package is already there. If the package was not in the library, then Netbeans would have shown a red line under the import statement, but it is not showing that red line too.</p>
  
  <p>Where is the problem?</p>