blocks|key|4344752|text|Runnable：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4344753|val+myRunnable+=+runnable+{

}|code-block|syntax|javascript|4344754|线程：|4344755|Thread({++
//+call+runnable+here
++println("running+from+lambda:+${Thread.currentThread()}")
}).start()|4344756|您在这里看不到Runnable+:在Kotlin中，可以很容易地将其替换为lambda表达式。有没有更好的方法？好的!下面是如何实例化和启动Kotlin风格的线程：|4344757|thread(start+=+true)+{++
++++++println("running+from+thread():+${Thread.currentThread()}")
++++}|4344758|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Runnable:

<pre><code>val myRunnable = runnable {

}
</code></pre>

Thread:

<pre><code>Thread({ 
// call runnable here
 println("running from lambda: ${Thread.currentThread()}")
}).start()
</code></pre>

You don't see a Runnable here: in Kotlin it can easily be replaced with a lambda expression. Is there a better way? Sure! Here's how you can instantiate and start a 
thread Kotlin-style:

<pre><code>thread(start = true) { 
 println("running from thread(): ${Thread.currentThread()}")
 }
</code></pre>

blocks|key|4344816|text|我做了以下工作，它看起来像预期的那样工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4344817|Thread(Runnable+{
++++++++++++//some+method+here
++++++++}).start()|code-block|syntax|javascript|4344818|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I did the following and it appears to be working as expected.

<pre class="lang-kotlin prettyprint-override"><code>Thread(Runnable {
 //some method here
 }).start()
</code></pre>

blocks|key|4344792|text|最好的方法是使用kotlin.concurrent中的thread()生成器函数：https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.concurrent/thread.html|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4344793|您应该检查它的默认值，因为它们非常有用：|4344794|thread()+{+/*+do+something+*/+}|code-block|syntax|javascript|4344795|请注意，您不需要像线程示例中那样调用start()，也不需要提供start=true。|4344796|对于长时间运行的线程要小心。指定thread(isDaemon=+true)非常有用，这样您的应用程序才能正确终止。|4344797|通常情况下，应用程序将一直等到所有非守护进程线程终止。|4344798|entityMap|0|LINK|mutability|MUTABLE|url|https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.concurrent/thread.html^0|8|H|R|8|15|22|0|0|0|0|I|7|W|A|0|G|M|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@$9|15|A|16|1|17]]|E|$]]|$1|F|3|G|5|6|7|18|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|19|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|1F|8|@$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1I|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]]]

Best way would be to use <code>thread()</code> generator function from <code>kotlin.concurrent</code>:
<a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.concurrent/thread.html" rel="nofollow noreferrer">https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.concurrent/thread.html</a>
You should check its default values, as they're quite useful:
<pre><code>thread() { /* do something */ }
</code></pre>
Note that you don't need to call <code>start()</code> like in the Thread example, or provide <code>start=true</code>.
Be careful with threads that run for a long period of time. It's useful to specify <code>thread(isDaemon= true)</code> so your application would be able to terminate correctly.
Usually application will wait until all non-daemon threads terminate.

blocks|key|4344689|text|首先，创建一个用于设置默认属性的函数|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4344690|fun+thread(
++start:+Boolean+=+true,+
++isDaemon:+Boolean+=+false,+
++contextClassLoader:+ClassLoader?+=+null,+
++name:+String?+=+null,+
++priority:+Int+=+-1,+
++block:+()+->+Unit
):+Thread|code-block|syntax|javascript|4344691|然后进行后台操作，调用该函数|4344692|thread(start+=+true)+{
+++++//Do+background+tasks...
}|4344693|或者kotlin协程也可以用来执行后台任务|4344694|GlobalScope.launch+{

++++//TODO("do+background+task...")
++++withContext(Dispatchers.Main)+{
++++++++//+TODO("Update+UI")
++++}
++++//TODO("do+background+task...")
}|4344695|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Firstly, create a function for set default propery

<pre><code>fun thread(
 start: Boolean = true, 
 isDaemon: Boolean = false, 
 contextClassLoader: ClassLoader? = null, 
 name: String? = null, 
 priority: Int = -1, 
 block: () -&gt; Unit
): Thread
</code></pre>

then perform background operation calling this function

<pre><code>thread(start = true) {
 //Do background tasks...
}
</code></pre>

Or kotlin coroutines also can be used to perform background task

<pre><code>GlobalScope.launch {

 //TODO("do background task...")
 withContext(Dispatchers.Main) {
 // TODO("Update UI")
 }
 //TODO("do background task...")
}
</code></pre>

blocks|key|4344866|text|使用Lamda的Thread的基本示例|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4344867|fun+main()+{
++++val+mylamda+=+Thread({
++++++++for+(x+in+0..10){
++++++++++++Thread.sleep(200)
++++++++++++println("$x")
++++++++}
+++})
++++startThread(mylamda)

}

fun+startThread(mylamda:+Thread)+{
++++mylamda.start()
}|code-block|syntax|javascript|4344868|entityMap^0|2|5|8|6|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

Basic example of <code>Thread</code> with <code>Lamda</code>

<pre><code>fun main() {
 val mylamda = Thread({
 for (x in 0..10){
 Thread.sleep(200)
 println("$x")
 }
 })
 startThread(mylamda)

}

fun startThread(mylamda: Thread) {
 mylamda.start()
}
</code></pre>

blocks|key|4344645|text|thread+{+/*+your+code+here+*/+}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4344646|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>thread { /* your code here */ }
</code></pre>

blocks|key|4344763|text|请尝试此代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4344764|Thread().run+{+Thread.sleep(3000);+}|code-block|syntax|javascript|4344765|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Please try this code:

<pre><code>Thread().run { Thread.sleep(3000); }
</code></pre>

blocks|key|4344612|text|fun+main(args:+Array<String>)+{

++++Thread({
++++++++println("test1")
++++++++Thread.sleep(1000)
++++}).start()

++++val+thread+=+object:+Thread(){
++++++++override+fun+run(){
++++++++++++println("test2")
++++++++++++Thread.sleep(2000)
++++++++}
++++}

++++thread.start()

++++Thread.sleep(5000)
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4344613|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>fun main(args: Array&lt;String&gt;) {

 Thread({
 println("test1")
 Thread.sleep(1000)
 }).start()

 val thread = object: Thread(){
 override fun run(){
 println("test2")
 Thread.sleep(2000)
 }
 }

 thread.start()

 Thread.sleep(5000)
}
</code></pre>

In Java it works by accepting an object which implements runnable :

<pre><code>Thread myThread = new Thread(new myRunnable())
</code></pre>

where <code>myRunnable</code> is a class implementing <code>Runnable</code>. 

But when I tried this in Kotlin, it doesn't seems to work:

<pre><code>var myThread:Thread = myRunnable:Runnable
</code></pre>

How to initialize a Thread in Kotlin?

Kotlin

Java

在Java中，它的工作方式是接受一个实现runnable的对象：Thread myThread = new Thread(new myRunnable())其中myRunnable是实现Runnable的类。但当我在Kotlin中尝试时，它似乎不起作用：var myThread:Thread = myRunnable:Runnable

问如何在Kotlin中初始化线程？
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