java - How do I create a new instance of thread multiple times in same program -


i newbie please forgive me if not clear want. have java app inserts 2 mysql tables upon clicking submit, 1 on local machine , other on web server . problem have created 2 threads , 1 each . works fine first time app launched , started , when app running , try insert again clicking submit , not . again when restart app works fine first time . question how stop thread or end , start new instance of , in same instance of app.

am sorry if not clear .

heres code,

  final int m = msfuntion.getmemomoc();   thread t1 = new thread(new runnable(){  public void run()  {  while(runt1){  try{         for(int i=0;i<=jtable2.getrowcount();i++)             {                 object slno= jtable2.getvalueat(i, 1);                 object item2=  jtable2.getvalueat(i, 2);                 object size2= jtable2.getvalueat(i, 3);                  string = slno.tostring();                 string si = item2.tostring();                 int qt = integer.parseint(size2.tostring());                  msfuntion.saledetails(m,it, si, qt);                 //msfuntion.saledetailsweb(m,it, si, qt);                 sc=0;             }         }catch(exception e)         {         e.printstacktrace();         }     runt1=false;     }   }  });  thread t2 = new thread(new runnable(){   public void run() {  while(runt2){   try{         for(int i=0;i<=jtable2.getrowcount();i++)             {                 object slno= jtable2.getvalueat(i, 1);                 object item2=  jtable2.getvalueat(i, 2);                 object size2= jtable2.getvalueat(i, 3);                  string = slno.tostring();                 string si = item2.tostring();                 int qt = integer.parseint(size2.tostring());                  //msfuntion.saledetails(m,it, si, qt);                 msfuntion.saledetailsweb(m,it, si, qt);                 sc=0;             }         }catch(exception e)         {         e.printstacktrace();         }     runt2=false;        }      t1.start();      t2.start()

it doesn't sound threading issue me. sounds don't commit write or release database connection after write data both tables. depending on how write data database, can happen works 1 thread, not if multiple threads. when run first time, first thread locks database , thread created second write, can't write data because first thread didn't release lock.

one other thing, instead of spawning 2 threads every time clicks button, better use executorservice


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