java - Getter Setter method being called at wrong order -

i need help. im making app parses bible , displays in webview. implemented next/passage feature app. calling correct json address iv´e got issues order in getters , setters being called.

this code block calls static method in order string response:

 string previouspassage = backnextgo.getpassage                     (currentchapter, chapterselected);         l.m("previouspassage"); 

and methods calls:

public class backnextgo {      private backnextgo() {     }      private static string requesturl;     private static requestqueue queue;      private static string s;      public static string getpassage(string data, int chapterselected) {         setrequesturl(data, chapterselected);         queue = volleysingleton.getinstance().getrequestqueue();         sendjsonrequest();         return getdata();     }      private static void setrequesturl(string s, int chapterselected) {         requesturl = constants.display_data_url_part_1                 + s.replaceall("\\s+", "").replaceall("(\\d+)(?!.*\\d)",                         string.valueof(chapterselected))                         + constants.display_data_url_part_2 + constants.bible_api_key;     }      private static string getrequesturl() {         return requesturl;     }      private static void sendjsonrequest() {         jsonobjectrequest request = new jsonobjectrequest(request.method.get,                 getrequesturl(), new response.listener<jsonobject>() {              @override             public void onresponse(jsonobject response) {                  if (response == null || response.length() == 0) {                  } else {                      try {                         setdata(response                                 .getstring(constants.keys.books.key_selected_chapter));                      } catch (jsonexception e) {                         e.printstacktrace();                     }                 }             }          }, new response.errorlistener() {             @override             public void onerrorresponse(volleyerror error) {             }         });         queue.add(request);     }      public static string getdata() {         counter++;         l.m("getter method");         return s;     }      private static void setdata(string data) {         s = data;         l.m("setter method");     } } 

i have placed toasts on getter , setter method on method calling backnextpassage static class.

and order is:

1) getter method

2) calling code block (string)

3) setter method

to understanding, order should be: first setter method. becouse called within "sendjsonrequest" method , getdata or getter method, , calling method.

this sucks becouse everytime call backnextpassage class im getting data set last call. appreciated =)

ps:

l("some random text"); these normal toasts like: toast.maketext(context, "........show();

update!:

so tried synchronizing methods hangs until app crashes... heres code: (maybe can point out mistake? =) )

public class backnextgo {  private static backnextgo instance = null; private string requesturl; private requestqueue queue; private string s;  private backnextgo() { }  public static backnextgo getinstance() {     if (instance == null) {         instance = new backnextgo();     }     return instance; }  public string getpassage(string data, int chapterselected) {     setrequesturl(data, chapterselected);     queue = volleysingleton.getinstance().getrequestqueue();     synchronized (this) {         sendjsonrequest();          try {             wait();         } catch (interruptedexception e) {             e.printstacktrace();         }     }     return getdata(); }  private void setrequesturl(string s, int chapterselected) {     requesturl = constants.display_data_url_part_1 + s.replaceall("\\s+", "").replaceall("(\\d+)(?!.*\\d)", string.valueof(chapterselected)) + constants.display_data_url_part_2 + constants.bible_api_key;     system.out.println(requesturl); }  private string getrequesturl() {     return requesturl; }  private void sendjsonrequest() {     jsonobjectrequest request = new jsonobjectrequest(request.method.get, getrequesturl()             , new response.listener<jsonobject>() {          @override         public void onresponse(jsonobject response) {              if (response == null || response.length() == 0) {              } else {                  try {                     setdata(response.getstring(constants.keys.books.key_selected_chapter));                  } catch (jsonexception e) {                     e.printstacktrace();                 }             }         }      }, new response.errorlistener() {         @override         public void onerrorresponse(volleyerror error) {         }     });     queue.add(request); }  private void setdata(string data) {     synchronized (this) {         s = data;         notify();     } }  public string getdata() {     return s; } } 

and again... heres code calling class:

string previouspassage = backnextgo.getinstance().getpassage(currentchapter, chapterselected); 

so create interface in backnextgo

public class backnextgo {  public interface ondata {     public void updatedata(string data); }  private backnextgo() { }  private static string requesturl; private static requestqueue queue;  private static string s; private ondata sondata = null;  public static string getpassage(string data, int chapterselected, ondata ondatacallback) {     sondata = ondatacallback;     setrequesturl(data, chapterselected);     queue = volleysingleton.getinstance().getrequestqueue();     sendjsonrequest();     return getdata(); }  private static void setrequesturl(string s, int chapterselected) {     requesturl = constants.display_data_url_part_1             + s.replaceall("\\s+", "").replaceall("(\\d+)(?!.*\\d)",                     string.valueof(chapterselected))                     + constants.display_data_url_part_2 + constants.bible_api_key; }  private static string getrequesturl() {     return requesturl; }  private static void sendjsonrequest() {     jsonobjectrequest request = new jsonobjectrequest(request.method.get,             getrequesturl(), new response.listener<jsonobject>() {          @override         public void onresponse(jsonobject response) {              if (response == null || response.length() == 0) {              } else {                  try {                     setdata(response                             .getstring(constants.keys.books.key_selected_chapter));                  } catch (jsonexception e) {                     e.printstacktrace();                 }             }         }      }, new response.errorlistener() {         @override         public void onerrorresponse(volleyerror error) {         }     });     queue.add(request); }  public static string getdata() {     counter++;     l.m("getter method");     return s; }  private static void setdata(string data) {     s = data;     if(sondata != null) {         sondata.updatedata(data);     }     l.m("setter method"); } } 

then in calling class like...

string previouspassage; ondata ondatacallback = new ondata {     public void updatedata(string data) {         previouspassage = data;     } }; backnextgo.getinstance().getpassage(currentchapter, chapterselected, ondatacallback); 

good luck, happy coding.