一、继承 Thread 类

class MyThread : Thread() {
    override fun run() {
        println("线程运行中: ${currentThread().name}")
    }
}

val thread = MyThread()
thread.start()

二、实现 Runnable 接口

class MyRunnable : Runnable {
    override fun run() {
        println("线程运行中: ${Thread.currentThread().name}")
    }
}

val thread = Thread(MyRunnable())
thread.start()

三、使用匿名内部类

1. 匿名 Thread

Thread(object : Thread() {
    override fun run() {
        println("线程运行中: ${currentThread().name}")
    }
}).start()

2. 匿名 Runnable

Thread(Runnable {
    println("线程运行中: ${Thread.currentThread().name}")
}).start()

四、使用 Lambda 表达式

Thread({
    println("线程运行中: ${Thread.currentThread().name}")
}).start()

// 最简洁的形式，Lambda 表达式是最后一个参数时可以省略括号

Thread {
    println("线程运行中: ${Thread.currentThread().name}")
}.start()

五、Kotlin 的 thread 函数

1、基本介绍

public fun thread(
    start: Boolean = true,
    isDaemon: Boolean = false,
    contextClassLoader: ClassLoader? = null,
    name: String? = null,
    priority: Int = -1,
    block: () -> Unit
): Thread {

    ...

}

2、演示

thread {
    println("Kotlin Thread: ${Thread.currentThread().name}")
}

thread(
    name = "MyKotlinThread",
    priority = 5
) {
    println("Kotlin Thread: ${Thread.currentThread().name}")
}