Design 4 threads, where two threads add 1 to J at a time, and two threads each decrease by 1 for j

1  PackageZzg;2 3  Public classThreadTest {4 Private intJ;5  Public Static voidMain (string[] arge) {6ThreadTest T1 =Newthreadtest ();7inc inc = T1.NewInc ();8Dec dec = t1.NewDec ();9      for(inti=0;i<2;i++){TenThread T =NewThread (inc); One T.start (); At =NewThread (DEC); - T.start (); -     } the } - Private  synchronized voidInc () { -J + +; -System.out.println (Thread.CurrentThread (). GetName () + "-inc:" +j); + } - Private synchronized voidDec () { +j--; ASystem.out.println (Thread.CurrentThread (). GetName () + "-inc:" +j); at } - classIncImplementsrunnable{ -      Public  voidrun () { -          for(inti=0;i<100;i++){ - Inc (); -         } in     } - } to classDecImplementsrunnable{ +      Public voidrun () { -          for(inti=0;i<100;i++){ the Dec (); *         } $     }Panax Notoginseng } -}

Design 4 threads, where two threads add 1 to J at a time, and two threads each decrease by 1 for j