MSDN:Blocks the calling thread until a thread terminates
1. 什么是 the calling thread?
2. 什么是 a thread?
运行一个程序,即开启了一个进程和至少一个线程,干活的是线程而非进程!the calling thread 我们可以认为是MainThread(或者调用线程的线程,是不是有点绕?呵呵),a thread 我们就认为是被调用的线程。
最后,我们可以这样翻译MSDN:当 a thread 调用Join方法的时候,MainThread 就被停止执行,直到 a thread 线程执行完毕。
下面是测试代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
namespace Test
{
class TestThread
{
private static void ThreadFuncOne()
{
for (int i = 0; i < 10; i++)
{
Console.WriteLine(Thread.CurrentThread.Name +" i = " + i);
}
Console.WriteLine(Thread.CurrentThread.Name + " has finished");
}
static void Main(string[] args)
{
Thread.CurrentThread.Name = "MainThread";
Thread newThread = new Thread(new ThreadStart(TestThread.ThreadFuncOne));
newThread.Name = "NewThread";
for (int j = 0; j < 20; j++)
{
if (j == 10)
{
newThread.Start();
newThread.Join();
}
else
{
Console.WriteLine(Thread.CurrentThread.Name + " j = " + j);
}
}
Console.Read();
}
}
}
结论:
MainThread 在 NewThread.Join() 被调用后被阻塞,直到 NewThread 执行完毕才继续执行。