JFileChooser

kan ikke få koden til at virke, fejl beskeden er

Type mismatch: cannot convert from java.io.File to jazz.File



public void openMenuItem_ActionPerformed(java.awt.event.ActionEvent actionEvent) {
    JFileChooser fc = new JFileChooser();
    int returnVal = fc.showOpenDialog(GLayer.this);

      if (returnVal == JFileChooser.APPROVE_OPTION) {
          File file = fc.getSelectedFile();
          //this is where a real application would open the file.
          String res = "Opening: " + file.getName() + "." + "\n";
          } else {
                String res = "Open command cancelled by user." + "\n";
          }
}