public static void main(String[] args) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println(Thread.currentThread().getName() + "我是一個(gè)無(wú)返回結(jié)果的任務(wù)線程");
            }
        },"線程一:").start(); //start()開(kāi)啟任務(wù)
    }

二：Callable示例

2.1 JAVA異步編程之Callbacks與Futures模型

我是用Executors線程池的方式來(lái)創(chuàng)建的。

2.2 用最原始的方法

public class PrimitiveCallable implements Callable, Runnable {
    
    public static void main(String[] args) {
        //實(shí)現(xiàn)
        new Thread(new PrimitiveCallable(), "線程二:").start();
    }
    @Override
    public void run() {//Runnable實(shí)現(xiàn)
        try {
            Object call = this.call();
            System.out.println(call);
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }
    @Override
    public Object call() throws Exception { //Callable 實(shí)現(xiàn)
        return "異步任務(wù)返回的結(jié)果!!!";
    }
}

2.3 FutureTask 一種jdk的實(shí)現(xiàn)方式

public class FutureTask<V> implements RunnableFuture<V> { //RunnableFuture 實(shí)現(xiàn)了以上2個(gè)接口
    ........省略.........
	public void run() { //重寫(xiě)run實(shí)現(xiàn)
        if (state != NEW ||
            !UNSAFE.compareAndSwapObject(this, runnerOffset,
                                         null, Thread.currentThread()))
            return;
        try {
            Callable<V> c = callable; //構(gòu)建對(duì)象是傳入的參數(shù)
            if (c != null && state == NEW) {
                V result;
                boolean ran;
                try {
                    result = c.call(); //調(diào)用任務(wù)并返回結(jié)果
                    ran = true;
                } catch (Throwable ex) {
                    result = null;
                    ran = false;
                    setException(ex); //設(shè)置異常時(shí)的結(jié)果
                }
                if (ran)
                    set(result); //設(shè)置結(jié)果
            }
        } finally {
            runner = null;
            int s = state;
            if (s >= INTERRUPTING)
                handlePossibleCancellationInterrupt(s);
        }
    }
     ........省略.........
}

小結(jié)

1 不要糾結(jié)有幾種創(chuàng)建線程的方法了，就一種即通過(guò)Thread，但Thread有9個(gè)構(gòu)造函數(shù)方法

2 9個(gè)構(gòu)造函數(shù)方法

 public Thread()
 public Thread(Runnable target)
 Thread(Runnable target, AccessControlContext acc)
 public Thread(ThreadGroup group, Runnable target)
 public Thread(String name)
 public Thread(ThreadGroup group, String name)
 public Thread(Runnable target, String name)
 public Thread(ThreadGroup group, Runnable target, String name)
 public Thread(ThreadGroup group, Runnable target, String name,
                  long stackSize)

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