Android Studio - CheckBox is making App crash -

i working on activity register page input info , store in object.

this problem arose when tried implement check boxes code.

is there solution this?

public class register extends appcompatactivity implements view.onclicklistener {     button bregister, bback;     edittext etname, etage, etusername, etpassword;     checkbox cbaccount;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_register);          // user info         etname = (edittext) findviewbyid(r.id.etname);         etage = (edittext) findviewbyid(r.id.etage);         etusername = (edittext) findviewbyid(r.id.etusername);         etpassword = (edittext) findviewbyid(r.id.etpassowrd);         bregister = (button) findviewbyid(r.id.bregister);         bback = (button) findviewbyid(r.id.bback);         cbaccount = (checkbox)findviewbyid(r.id.cbaccount);          bregister.setonclicklistener(this);         bback.setonclicklistener(this);         cbaccount.setonclicklistener(this);     }      boolean account = false;      @override     public void onclick(view view) {         boolean checked = ((checkbox) view).ischecked();         //"switch" if statement, 1 can put multiple "cases"         switch(view.getid()) {              // when user registers, store info             case r.id.bregister:                 // store user info                 string name = etname.gettext().tostring();                 string username = etusername.gettext().tostring();                 string password = etpassword.gettext().tostring();                 int age = integer.parseint(etage.gettext().tostring());                 boolean accountsend = account;                 // call method store user info login.java class authentication                 userlocalstorage uls = userlocalstorage.getinstance();                  uls.setusername(username);                 uls.setpassword(password);                 uls.setname(name);                 uls.setage(age);                 uls.setaccount(accountsend);                  startactivity(new intent(this, login.class));                  break;             case r.id.bback:                 startactivity(new intent(this, login.class));                 break;             case r.id.cbaccount:                 if (checked) {                     account = true;                 } else {                     account = false;                 }                 break;         }     } } 

here logcat
01-24 20:43:15.971 8074-8074/com.example.huynh.nom e/androidruntime: fatal exception: main
process: com.example.huynh.nom, pid: 8074
java.lang.classcastexception: android.support.v7.widget.appcompatbutton cannot cast android.widget.checkbox
@ com.example.huynh.nom.register.onclick(register.java:44)
@ android.view.view.performclick(view.java:5198)
@ android.view.view$performclick.run(view.java:21147)
@ android.os.handler.handlecallback(handler.java:739)
@ android.os.handler.dispatchmessage(handler.java:95)
@ android.os.looper.loop(looper.java:148)
@ android.app.activitythread.main(activitythread.java:5417)
@ java.lang.reflect.method.invoke(native method)
@ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:726)
@ com.android.internal.os.zygoteinit.main(zygoteinit.java:616)

in onclick handler have following line:

boolean checked = ((checkbox) view).ischecked(); 

since registered same handler used multiple different views not work since not checkboxes.

remove line , can instead:

case r.id.cbaccount:     if (cbaccount.ischecked()) {         account = true;     } else {         account = false;     } break;