java - error in quiz game using swings -

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i having problem in quiz game. using netbeans. in game have 2 classes 1st driver class ie quiz , second non driver class ie radioquestion. posting code both classes. having 2 errors in radioquetion class.

my error message in quiz.java "cannot find symbol class: radioquestion location: class quiz.quiz" , in radioquestion "total not public in quiz.quiz; cannot accessed outside package" , "wrong not public in quiz.quiz; cannot accessed outside package" , 1 warning "implements: java.awt.event.actionlisteneractionperformed(actionevent e)".

quiz.quiz class

package quiz;  import java.awt.cardlayout; import java.util.random; import javax.swing.jframe; import javax.swing.joptionpane; import javax.swing.jpanel;  public class quiz extends jframe{     jpanel p=new jpanel();     cardlayout cards=new cardlayout();     int numqs;     int wrongs=0;     int total=0;     //radioquestion[8] questions=new radioquestion();      string[][] answers={         {"a","b","c","d"},         {"e","f","g","h"},         {"i","j","k","l"},         {"m","n","o","p"},         {"true","false"},         {"true","false"},         {"4","5","6","7"},         {"q","r","s","t"},     };      radioquestion questions[]={          new radioquestion("what",answers[0],1,this),         new radioquestion("what",answers[1],3,this),         new radioquestion("what",answers[2],0,this),         new radioquestion("what",answers[3],1,this),         new radioquestion("what",answers[4],1,this),         new radioquestion("what",answers[5],0,this),         new radioquestion("what",answers[6],0,this),         new radioquestion("what",answers[7],2,this),         new radioquestion("what",answers[8],1,this),     };     public static void main(string[] args) {         //line missing         //line missing         //line missing      new quiz();       }         public quiz(){             super("quiz game");             setresizable(true);             setsize(500,400);             setdefaultcloseoperation(exit_on_close);              p.setlayout(cards);                  numqs=questions.length;                 for(int i=0;i<numqs;i++){                     p.add(questions[i],"q"+i);                 }                     random r=new random();                     int i=r.nextint(numqs);                     cards.show(p,"q"+i);               add(p);             setvisible(true);           }          public void next(){         if((total-wrongs)==numqs){showsummary();}         else{random r=new random();         boolean found=false;         int i=0;         while(!found){         i=r.nextint(numqs);         if(!questions[1].used)         {             found=true;         }}         cards.show(p,"q"+i);         }         }          public void showsummary(){         joptionpane.showmessagedialog(null,"all done result"+"\nincorrect: \t"+wrongs+"\n correct ans: \t"+(total-wrongs)+"\n avg inc ans per ques: \t"+((float)wrongs/numqs)+"\n percentage correct: \t\t"+(int)(((float)(total-wrongs)/total)*100)+ "%");         system.exit(0);                    } }   radioquestion class  import quiz.quiz;    import javax.swing.jbutton;     import javax.swing.jradiobutton;     import javax.swing.jpanel;     import javax.swing.jlabel;     import javax.swing.buttongroup;     //import javax.swing.jframe;     import javax.swing.joptionpane;     import javax.swing.boxlayout;      import java.awt.event.actionlistener;     import java.awt.event.actionevent;      public class radioquestion extends jpanel implements actionlistener {        // private static int exit_on_close;          //radioquestion=new radioquestion(string q, string[] options, int ans, quiz quiz);         int correctans;          quiz quiz;         int selected;         boolean used;          //question         jpanel qpanel=new jpanel();         //answers         jpanel apanel=new jpanel();         jradiobutton[] responses;         buttongroup group=new buttongroup();         //bottom         jpanel botpanel=new jpanel();         jbutton next=new jbutton("next");          jbutton finish=new jbutton("finish");          /*public static void main(string args[]){         jframe frame=new jframe("radio button test");         frame.setresizable(true);                 frame.setsize(500,400);                 frame.setdefaultcloseoperation(jframe.exit_on_close);          string[] answers={"wrong1","right","wrong2"};         frame.add(new radioquestion("whats right",answers,1));         frame.setvisible(true);     }*/         public radioquestion(string q, string[] options, int ans, quiz quiz){             //dought             this.quiz=quiz;             //dought         setlayout(new boxlayout(this,boxlayout.y_axis));         correctans=ans;         //question         qpanel.add(new jlabel(q));         //answer         responses=new jradiobutton[options.length];         for(int i=0;i<options.length;i++){         responses[i]=new jradiobutton(options[i]);         responses[i].addactionlistener(this);         group.add(responses[i]);         apanel.add(responses[i]);         }         add(apanel);         //bottom         next.addactionlistener(this);         finish.addactionlistener(this);         botpanel.add(next);         botpanel.add(finish);         add(botpanel);         } ////////////////////////////////////////////////////////////////////////////////         public void actionperformed(actionevent e){         object src=e.getsource();         //next button         if(src.equals(next)){         showresult();         if(selected==correctans){         used=true;         quiz.next();}}         //finish button         if(src.equals(finish)){         quiz.showsummary();}          //radio buttons         for(int i=0;i<responses.length;i++){         if(src==responses[i]){         selected=i;}         }}         public void showresult(){         string text=responses[selected].gettext();         quiz.total++;         if(selected==correctans){         joptionpane.showmessagedialog(null,text+"is correct\nwell done");         }else{         quiz.wrongs++;         joptionpane.showmessagedialog(null,text+" wrong\nsorry:(");}         }                     //public stataic void main(string[] arg);      }

it seems quiz class defined in package quiz , radioquestion resides in default package. 2 member of quiz class wrongs , total defined without explicit modifier , makes them package-private. these members can accessed within quiz package. errors indicate. see controlling access members of class more details.

you should define these members private , create getters , setters. ie: 

private int wrongs=0; private int total=0;  public int getwrongs() {     return wrongs; } public void setwrongs(int wrongs) {     this.wrongs = wrongs; } public int gettotal() {     return total; } public void settotal(int total) {     this.total = total; }

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