使用NetLogo控制API时，App.main中的NullPointerException

Question

我想将netbeans连接到netlogo。 我有一个类：NetLogoConnection 当我在GUI中单击OK btn时，我想调用该类。 代码如下：

import org.nlogo.app.App;
public class NetLogoConnection {
  public static void main(String[] argv) {
    App.main(argv);
    try {
      java.awt.EventQueue.invokeAndWait(
    new Runnable() {
      public void run() {
        try {
          App.app().open("C:/Users/fmar825/Desktop/fire.nlogo");
        }
        catch(java.io.IOException ex) {
          ex.printStackTrace();
        }}});
     // App.app().command("set density 62");
     // App.app().command("random-seed 0");
     // App.app().command("setup");
      //App.app().command("repeat 50 [ go ]");
      //System.out.println(
//App.app().report("burned-trees"));
    }
    catch(Exception ex) {
      ex.printStackTrace();
    }
  }
}

使用JButton调用类的代码如下：

private void okbtnActionPerformed(java.awt.event.ActionEvent evt) {                                      
 
        try {
           NetLogoConnection.main(new String[0] );
        } catch (Exception e) {
            e.printStackTrace();
        }
     
    


}                   

调用run方法的代码如下：

错误消息如下：

WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
java.lang.Error: Cannot call invokeAndWait from the event dispatcher thread
	at java.awt.EventQueue.invokeAndWait(EventQueue.java:1289)
	at java.awt.EventQueue.invokeAndWait(EventQueue.java:1282)
	at org.nlogo.awt.EventQueue$.invokeAndWait(EventQueue.scala:19)
	at org.nlogo.app.App$.main(App.scala:150)
	at org.nlogo.app.App.main(App.scala)
	at NetLogoConnection.main(NetLogoConnection.java:4)
	at User.okbtnActionPerformed(User.java:993)
	at User.access$1600(User.java:31)
	at User$19.actionPerformed(User.java:603)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
	at java.awt.Component.processMouseEvent(Component.java:6525)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
	at java.awt.Component.processEvent(Component.java:6290)
	at java.awt.Container.processEvent(Container.java:2234)
	at java.awt.Component.dispatchEventImpl(Component.java:4881)
	at java.awt.Container.dispatchEventImpl(Container.java:2292)
	at java.awt.Component.dispatchEvent(Component.java:4703)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
	at java.awt.Container.dispatchEventImpl(Container.java:2278)
	at java.awt.Window.dispatchEventImpl(Window.java:2739)
	at java.awt.Component.dispatchEvent(Component.java:4703)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)
	at java.awt.EventQueue.access$400(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:697)
	at java.awt.EventQueue$3.run(EventQueue.java:691)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.awt.EventQueue$4.run(EventQueue.java:719)
	at java.awt.EventQueue$4.run(EventQueue.java:717)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
java.lang.NullPointerException
	at org.nlogo.window.RuntimeErrorDialog.suppressJavaExceptionDialogs(RuntimeErrorDialog.java:63)
	at org.nlogo.app.App.handle(App.scala:779)
	at org.nlogo.util.Exceptions$.handle(Exceptions.scala:21)
	at org.nlogo.app.App$$anon$7.uncaughtException(App.scala:305)
	at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1057)
	at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1052)
	at java.awt.EventDispatchThread.processException(EventDispatchThread.java:223)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:215)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

建立成功（总时间：6秒）