public static void sucheVerbindung(MIDlet midlet) {
        String port;
        
        System.err.println( midlet.checkPermission("javax.microedition.io.Connector.comm"));
        
        String ports = System.getProperty("microedition.commports");

        System.out.println(ports);
        int comma = ports.indexOf(',');
        if (comma > 0) {
            port = ports.substring(0, comma);
        } else {
            port =ports;
        }
        System.out.println(port);
        try {
            commConnection = (CommConnection) Connector.open("comm:0");
            System.err.println(commConnection.getBaudRate());
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

-1
0,1
0
open failed(0000000D): Permission denied
java.io.IOException: Permission denied
        at com.sun.midp.io.j2me.comm.Protocol.connect(Protocol.java:297)
        at com.sun.midp.io.ConnectionBaseAdapter.openPrim(ConnectionBaseAdapter.java:100)
        at javax.microedition.io.Connector.openPrim(Connector.java:302)
        at javax.microedition.io.Connector.open(Connector.java:211)
        at javax.microedition.io.Connector.open(Connector.java:187)
        at javax.microedition.io.Connector.open(Connector.java:169)
        at hello.Verbindung.sucheVerbindung(Verbindung.java:56)
        at hello.HelloMidlet$1.execute(HelloMidlet.java:143)
        at org.netbeans.microedition.util.SimpleCancellableTask.run(SimpleCancellableTask.java:103)
        at org.netbeans.microedition.lcdui.WaitScreen$BackgroundExecutor.run(WaitScreen.java:206)