參考資料：
https://www.cnblogs.com/songshu120/p/7966314.html

1）繼承Thread類

public class Thread01 {
    public static void main(String[] args) {
        Thread thread = new Thread() {
            @Override
            public void run() {
                System.out.println("thread start!");
            }
        };
        thread.start();
    }
}

public class Test01 {
    
    public static void main(String[] args) {
        
        //創(chuàng)建線程對象
        MyThread t = new MyThread();
        
        //啟動(dòng)線程
        t.start();
    }
}

//線程類
class MyThread extends Thread{
    //線程對象調(diào)到CPU資源后，運(yùn)行run方法
    @Override
    public void run() {
        for (int i = 1; i <= 10; i++) {
            System.out.println(i);
        }
    }
}

2）實(shí)現(xiàn)Runnable接口

public class Test01 {

    public static void main(String[] args) {
        
        //創(chuàng)建線程，并給任務(wù)
        Thread t = new Thread(new Task());
        //啟動(dòng)線程
        t.start();
        
    }
}
//任務(wù)類
class Task implements Runnable{
    @Override
    public void run() {
        for (int i = 1; i <= 10; i++) {
            System.out.println(i);
        }
    }
}

3）實(shí)現(xiàn)Callable接口，這種是有返回值的線程

public class Test01 {
    
    public static void main(String[] args) throws Exception {
        
        //將帶返回值的任務(wù)類裝載在FutureTask對象中
        FutureTask<String> futureTask = new FutureTask<>(new Task());
        
        Thread t = new Thread(futureTask);
        t.start();
        
        //獲取返回值
        String str = futureTask.get();
        System.out.println(str);
        
    }
}
//帶返回值的任務(wù)類
class Task implements Callable<String>{

    //類似于Runnable接口中的run方法，線程搶到資源就會(huì)執(zhí)行call方法
    @Override
    public String call() throws Exception {
        for (int i = 1; i <= 10; i++) {
            System.out.println(i);
        }
        return "帶返回值的任務(wù)類";
    }
    
}

4）通過線程池創(chuàng)建

創(chuàng)建線程池的幾種方式
https://www.cnblogs.com/jxxblogs/p/11655670.html
Java線程池的四種實(shí)現(xiàn)方法及實(shí)現(xiàn)原理及分析
https://blog.csdn.net/qq_40033365/article/details/79951507

5）線程池拒絕策略

http://www.itdecent.cn/p/f0506e098c5b

拒絕策略