java - Add a method on the x Button on JFrame and WordWrap -

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so i'm making notepad on java gui, have lot of problems @ time please me. first problem stated on title want add method x button on jframe. have method on codes below don't know how input on x button.

and other problem word-wrap jcheckboxmenuitem. not work don't know why . want behave in ordinary notepad (if click it word wrap , if click again stop). 

import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.scanner; import java.io.*; import javax.swing.text.defaulteditorkit;  public class sample extends jframe implements actionlistener  {       private jtextarea textarea = new jtextarea("", 0,0);// textarea     private jmenubar menubar = new jmenubar(); // menubar item        private jmenu edit =new jmenu("edit"); // edit menu     private jmenu file = new jmenu("file"); // file menu     private jmenu format = new jmenu ("format");// format menu  //    private wordbuttonhandler wordhandler;      //in format menu.     private jcheckbox word=new jcheckbox("word wrap");     private jmenuitem font=new jmenuitem("font");       // in edit menu.     private jmenuitem cut=new jmenuitem(new defaulteditorkit.cutaction());     private jmenuitem copy=new jmenuitem(new defaulteditorkit.copyaction());     private jmenuitem paste=new jmenuitem(new defaulteditorkit.pasteaction());       // in file menu.     private jmenuitem saveasfile=new jmenuitem("save as");// save-as option     private jmenuitem newfile = new jmenuitem("new"); // new option     private jmenuitem printfile = new jmenuitem("print");// print option     private jmenuitem openfile = new jmenuitem("open");  // open option     private jmenuitem savefile = new jmenuitem("save"); // save option     private jmenuitem close = new jmenuitem("close"); // , close option!      public sample() {            setsize(500, 300);          settitle("java notepad");          setdefaultcloseoperation(do_nothing_on_close);          textarea.setfont(new font("times new roman", font.bold, 12));          textarea.setautoscrolls(rootpanecheckingenabled);             container p = getcontentpane();         p.setlayout(new borderlayout());         p.add(textarea);          // menu bar          setjmenubar(menubar);          menubar.add(file);          menubar.add(edit);         menubar.add(format);          // cut option.              cut.setlabel("cut");         cut.setaccelerator(keystroke.getkeystroke(keyevent.vk_x,actionevent.ctrl_mask));         edit.add(cut);        // copy option.         copy.setlabel("copy");         copy.setaccelerator(keystroke.getkeystroke(keyevent.vk_c,actionevent.ctrl_mask));         edit.add(copy);        // paste option.          paste.setlabel("paste");         paste.setaccelerator(keystroke.getkeystroke(keyevent.vk_v,actionevent.ctrl_mask));         edit.add(paste);           //word wrap option //       word.additemlistener(wordhandler);        format.add(word); //       wordhandler=new wordbuttonhandler();         // font option         font.addactionlistener(this);        format.add(font);          //new option             newfile.addactionlistener(this);        newfile.setaccelerator(keystroke.getkeystroke(keyevent.vk_n,actionevent.ctrl_mask));        file.add(newfile);              // open option         openfile.addactionlistener(this); // add action listener (so know when it's been clicked         openfile.setaccelerator(keystroke.getkeystroke(keyevent.vk_o,actionevent.ctrl_mask)); // set keyboard shortcut         file.add(openfile); // add "file" menu            //  save option         savefile.addactionlistener(this);         savefile.setaccelerator(keystroke.getkeystroke(keyevent.vk_s,actionevent.ctrl_mask));         file.add(savefile);           // save option.         saveasfile.addactionlistener(this);          file.add(saveasfile);           // print option         printfile.addactionlistener(this);         printfile.setaccelerator(keystroke.getkeystroke(keyevent.vk_p,actionevent.ctrl_mask));         file.add(printfile);           //  close option         close.setaccelerator(keystroke.getkeystroke(keyevent.vk_f4,actionevent.ctrl_mask));         close.addactionlistener(this);         file.add(close);     } //    public class wordbuttonhandler implements itemlistener{ //     //       //    @override //    public void itemstatechanged(itemevent e){ //        if(e.getsource()==word){ //            if(e.getstatechange()==itemevent.selected) //                textarea.setlinewrap(true); //                textarea.setwrapstyleword(true); //            if(e.getstatechange()==itemevent.deselected) //                textarea.setlinewrap(false); //                textarea.setwrapstyleword(false); //        } //    } //    }        public void windowclosing(windowevent e){         if(textarea.gettext().isempty() == false){             jdialog.setdefaultlookandfeeldecorated(true);             int response = joptionpane.showconfirmdialog(null, "do want save changes ?","my notepad",joptionpane.yes_no_option, joptionpane.question_message);              if(response == joptionpane.no_option){                 system.exit(0);             }             else if(response == joptionpane.yes_option){                 jfilechooser save = new jfilechooser();                  int option = save.showsavedialog(this);                 if (option == jfilechooser.approve_option) {                  try {                        bufferedwriter out = new bufferedwriter(new filewriter(save.getselectedfile().getpath()));                      out.write(this.textarea.gettext());                      out.close();                   } catch (exception ex) {                      system.out.println(ex.getmessage());                  }              }             }               }         else{             system.exit(0);         }        }       @suppresswarnings("empty-statement")     public void actionperformed (actionevent e) {            if (e.getsource() == this.close)             dispose();             if (e.getsource() == this.openfile) {             jfilechooser open = new jfilechooser();             int option = open.showopendialog(this);              file file ;             if (option == jfilechooser.approve_option)                  this.textarea.settext("");                  file=open.getselectedfile();               try{             bufferedreader in = new bufferedreader(new filereader(file));             try{             string line=in.readline();             while(line !=null){                 textarea.append(line+"\n");                 line=in.readline();             }                           }catch(ioexception ex){                 system.out.println(ex.getmessage());             }                             } catch (filenotfoundexception ex) {                     system.out.println(ex.getmessage());                  }            }              else if (e.getsource() == this.savefile || e.getsource ()==this.saveasfile) {             jfilechooser save = new jfilechooser();              int option = save.showsavedialog(this);                 if (option == jfilechooser.approve_option) {                  try {                        bufferedwriter out = new bufferedwriter(new filewriter(save.getselectedfile().getpath()));                      out.write(this.textarea.gettext());                      out.close();                   } catch (exception ex) {                      system.out.println(ex.getmessage());                  }              }          } else if(e.getsource()==this.printfile){             try {                  boolean complete = textarea.print();                  if (complete) {                          /* show success message  */                    joptionpane.showmessagedialog(null,"success","printing",joptionpane.information_message);                          } else {         /*show message indicating printing cancelled */                      joptionpane.showmessagedialog(null,"cancelled","printing",joptionpane.warning_message);                          }                         } catch (exception pe) {              /* printing failed, report user */         joptionpane.showmessagedialog(null,"failed","printing",joptionpane.error_message);                 }         }           else if (e.getsource()==this.newfile){              if(textarea.gettext().isempty() == false){               //  textarea.settext("");             jdialog.setdefaultlookandfeeldecorated(true);             int response = joptionpane.showconfirmdialog(null, "do want save changes ?","my notepad",joptionpane.yes_no_option, joptionpane.question_message);              if(response == joptionpane.no_option){                 textarea.settext("");              }             else if(response == joptionpane.yes_option){                 jfilechooser save = new jfilechooser();                  int option = save.showsavedialog(this);                 if (option == jfilechooser.approve_option) {                  try {                        bufferedwriter out = new bufferedwriter(new filewriter(save.getselectedfile().getpath()));                      out.write(this.textarea.gettext());                      out.close();                      textarea.settext("");                  } catch (exception ex) {                      system.out.println(ex.getmessage());                  }              }             }                  }             }      }      public static void main(string args[]) {          sample app = new sample();          app.setvisible(true);  }  }

how can make block of code work. in codes above? can't seem make run

public void windowclosing(windowevent e){     if(textarea.gettext().isempty() == false){         jdialog.setdefaultlookandfeeldecorated(true);         int response = joptionpane.showconfirmdialog(null, "do want save changes ?","my notepad",joptionpane.yes_no_option, joptionpane.question_message);          if(response == joptionpane.no_option){             system.exit(0);         }         else if(response == joptionpane.yes_option){             jfilechooser save = new jfilechooser();              int option = save.showsavedialog(this);             if (option == jfilechooser.approve_option) {              try {                    bufferedwriter out = new bufferedwriter(new filewriter(save.getselectedfile().getpath()));                  out.write(this.textarea.gettext());                  out.close();               } catch (exception ex) {                  system.out.println(ex.getmessage());              }          }         }           }     else{         system.exit(0);     }    }

add method on x button on jframe

add windowlistener. see how write window listeners details , examples.


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