Java multi-Threading and locking

Multithreading

The difference between threads and processes

Creating Threads

• By implementing the Runnable interface

1 classRunnabledemoImplementsrunnable{2     PrivateThread t; Create a thread3     PrivateString ThreadName;4 5 Runnabledemo (String name) {6ThreadName =name;7System.out.println ("Creating" +threadname);8         Try{9              for(inti = 3; i > 0; i--){TenSystem.out.println ("Thread:" + ThreadName + "," +i); One                 //wait for a while. AThread.Sleep (50); -             } -}Catch(interruptedexception e) { theSystem.out.println ("Thread" + threadname + "interrupted"); -         } -System.out.println ("Thread" + ThreadName + "exiting."); -     }   +  - +      Public voidstart () { ASystem.out.println ("starting" + threadname); at         if(T = =NULL){ -t =NewThread ( This, threadname); - T.start (); -         } -     } -  in  Public classtestthread{ -      Public Static voidMain (string[] args) { toRunnabledemo R1 =NewRunnabledemo ("Thread-1"); + R1.start (); -  theRunnabledemo R2 =NewRunnabledemo ("Thread-2"); * R2.start (); $      }Panax Notoginseng}

When an object implementing interface Runnable was used to create a thread, starting the thread causes the object ' s run meth Od to is called in that separately executing thread.

• By inheriting the thread class

classThreaddemoextendsThread {PrivateThread t; PrivateString ThreadName; Threaddemo (String name) {ThreadName=name; System.out.println ("Creating" +threadname); }       Public voidrun () {System.out.println ("Running" +threadname); Try {          for(inti = 4; i > 0; i--) {System.out.println ("Thread:" + ThreadName + "," +i); //Let the thread sleep for a while.Thread.Sleep (50); }      }Catch(interruptedexception e) {System.out.println ("Thread" + ThreadName + "interrupted."); } System.out.println ("Thread" + ThreadName + "exiting."); }       Public voidstart () {System.out.println ("Starting" +threadname); if(T = =NULL) {T=NewThread ( This, ThreadName);      T.start (); }   }} Public classTestthread { Public Static voidMain (String args[]) {Threaddemo T1=NewThreaddemo ("Thread-1");            T1.start (); Threaddemo T2=NewThreaddemo ("Thread-2");   T2.start (); }   }

Java.lang.Thread

public class Threadextends Objectimplements Runnable

　　

Lock

Synchronous

Reference:

Http://www.tutorialspoint.com/java/java_multithreading.htm

Http://docs.oracle.com/javase/7/docs/api/java/lang/Runnable.html

Https://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html

Java multi-Threading and locking