java.io.IOException: Cannot run program "/opt/X11/bin/xprop": error=2, No such file or directory [closed]

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Hello everybody,

I’ve recently installed Fedora 23 on my computer system, with also these following softwares :

• NetBeans 8.0.1
• Jdk 1.8.0_71

One of the software I’m developing uses RMI Architecture.

These errors occurs while starting the programm inside and outside Netbeans environment :

Enregistrement de l'objet avec l'url : rmi://192.168.0.10/CtrLicence

java.io.IOException: Cannot run program "/opt/X11/bin/xprop": error=2, No such file or directory

at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at java.lang.Runtime.exec(Runtime.java:620)
at java.lang.Runtime.exec(Runtime.java:450)
at java.lang.Runtime.exec(Runtime.java:347)
at org.GNOME.Accessibility.AtkWrapper.<clinit>(AtkWrapper.java:34)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at java.lang.Class.newInstance(Class.java:442)
at java.awt.Toolkit.loadAssistiveTechnologies(Toolkit.java:805)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:887)
at java.awt.Window.getToolkit(Window.java:1362)
at java.awt.Window.init(Window.java:506)
at java.awt.Window.<init>(Window.java:537)
at java.awt.Frame.<init>(Frame.java:420)
at java.awt.Frame.<init>(Frame.java:385)
at javax.swing.JFrame.<init>(JFrame.java:189)
at applicomts011.MaClasseCalendrier.<init>(MaClasseCalendrier.java:55)
at applicomts011.FonctionsCommunesVue.<init>(FonctionsCommunesVue.java:803)
at applicomts011.GestionDeChainesEnLectureEtEcriture.<clinit>(GestionDeChainesEnLectureEtEcriture.java:44)
at traitementcentralserveurfounisseur.InterfaceDeGestionDesLicencesImplementation.<init>InterfaceDeGestionDesLicencesImplementation.java:122)
at traitementcentralserveurfounisseur.TraitementCentralServeurFounisseur.main(TraitementCentralServeurFounisseur.java:30)

Caused by: java.io.IOException: error=2, No such file or directory at java.lang.UNIXProcess.forkAndExec(Native Method) at java.lang.UNIXProcess.<init>(UNIXProcess.java:248) at java.lang.ProcessImpl.start(ProcessImpl.java:134) at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) ... 22 more

Does anyone have an idea ?

Thank you for your help.

Gerard SAUVAGE.

PS. The classes I used for my project with RMI Architecture are as follows :

• TraitementCentralServeurFounisseur (Main program)
• RMIClasseRegistre (Register)
• RMIContexteDInvocation (Invocation Context)
• RMIExceptionDInvocation (Invocation Exception)
• RMIManutentionnaire (Handler)

The source code of used classes is shown as follows :

• TraitementCentralServeurFounisseur : package traitementcentralserveurfounisseur;

import java.rmi.RemoteException; import java.util.logging.Level; import java.util.logging.Logger;

public class TraitementCentralServeurFounisseur {

public static void main(String[] args) {
    // Controle de la licence utiisateur en local avec celle existant en central 
    // squelette1 port 10011
    try {
        //final Registry registre = LocateRegistry.createRegistry(10011); 
        //InterfaceDeGestionDesLicences squelette1 = (InterfaceDeGestionDesLicences) UnicastRemoteObject.exportObject(new InterfaceDeGestionDesLicencesImplementation(), 10011);
        String url = "rmi://192.168.0.10/CtrLicence";
        System.out.println("Enregistrement de l'objet avec l'url : " + url);
        //registre.rebind(url, squelette1);
        new RMIClasseRegistre().enregistrer("CtrLicence", new InterfaceDeGestionDesLicencesImplementation()).publierUnNouveauPort(10011); // Ligne No 30
        System.out.println("Le serveur côté fournisseur vient d'être lancé");
    } catch (RemoteException ex) {
        Logger.getLogger(TraitementCentralServeurFounisseur.class.getName()).log(Level.SEVERE, null,ex);
    }
}

}

• RMIClasseRegistre : package traitementcentralserveurfounisseur;

import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.lang.reflect.Proxy; import java.net.ServerSocket; import java.net.Socket; import java.util.ArrayList; import java.util.HashMap; import java.util ... (more)