java - Threads affected by Thread.yield()? -

here multi-threaded helloworld:

public class helloworld {      public static void main(string[] args) throws interruptedexception {         thread mythread = new thread() {             public void run() {                 system.out.println("hello world new thread");             }         };         mythread.start();         thread.yield();         system.out.println("hello main thread");         mythread.join();     } } 

as understand, after mythread.start(), there 2 threads running. 1 main thread, , other newly-created mythread. then, thread referred in thread.yield()?

i checked java se6 doc, says

thread.yield(): causes executing thread object temporarily pause , allow other threads execute

but in codes, can't see currently excuting thread is, looks both threads running @ same time.

isn't more clear mythread.yield() instead of thread.yield()? have ideas this?

with "current thread" in context, javadoc means "the thread called method thread.yield()"

in case, main thread started application.

as javadoc explains, there no need call thread.yield(). it's not required anything:

a hint scheduler current thread willing yield current use of processor. scheduler free ignore hint.

it seem something, @ least java 6 - couldn't find reference java 7/8.

windows:

the hotspot vm implements thread.yield() using windows switchtothread() api call. call makes current thread give current timeslice, not entire quantum.

linux:

under linux, hotspot calls sched_yield(). consequences of call little different, , possibly more severe under windows.

source: http://www.javamex.com/tutorials/threads/yield.shtml