swing - Show confirm dialog in java -


here's actionperformed code logout button : 

private void jbutton5actionperformed(java.awt.event.actionevent evt) {     joptionpane jop = new joptionpane();     int option = jop.showconfirmdialog(null, "voulez-vous vraiment vous déconnecter?", "déconnexion", joptionpane.yes_no_option,joptionpane.question_message);     if(option == joptionpane.ok_option){         this.dispose();         connexion connexion = new connexion();         connexion.setvisible(true);     }            }

once click right on button, application stops running how can handle this?

here's rest of code button 

jbutton5.seticon(new javax.swing.imageicon(getclass().getresource("/sinpec/deco.png")));  jbutton5.setborderpainted(false); jbutton5.setcontentareafilled(false); jbutton5.setrollovericon(new javax.swing.imageicon(getclass().getresource("/sinpec/deco1.png"))); // noi18n jbutton5.addactionlistener(new java.awt.event.actionlistener() {     public void actionperformed(java.awt.event.actionevent evt) {         jbutton5actionperformed(evt);     } }); jpanel1.add(jbutton5); jbutton5.setbounds(70, 0, 50, 50); 

    this.dispose();     connexion connexion = new connexion();     connexion.setvisible(true);

change order?

    connexion connexion = new connexion();     connexion.setvisible(true);     this.dispose();

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