JavaでThreadクラスを使用する方法とその属性は何ですか

class MyThread extends Thread{
    @Override
    public void run() {
        //此时只是定义处理一个线程类，在系统中总是还没有创建出 新的线程。
        System.out.println("hello thread");
    }
}
public class TestDemo11 {
    public static void main(String[] args) {
        //创建线程
        Thread t = new MyThread();
        //启动线程，在系统中创建出了新的线程
        t.start();
    }
}

class MyThread3 extends Thread{
    @Override
    public void run() { //定义一个线程类
        while (true) {
            System.out.println("hello thread");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}
public class TestDemo13 {
    public static void main(String[] args) {
        Thread t = new MyThread3();
        t.start();//启动t线程
        while(true){
            System.out.println("hello main");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

//Runnable其实就是描述一个任务
//创建一个类，实现Runnable接口，重写Runnable类中的run方法，在run()方法中，描述的是该线程要指向的哪些任务。
class MyThread2 implements Runnable{
    @Override
    public void run() {
        System.out.println("hello thread");
    }
}
public class TestDemo12 {
    public static void main(String[] args) {
        //创建线程，把创建好的Runnable实例传给Thread实例
        Thread t = new Thread(new MyThread2());
        t.start();
    }
}

public class TestDemo14 {
    public static void main(String[] args) {
        Thread t1 = new MyThread(){
            @Override
            public void run() {
                System.out.println("hello thread1");
            }
        };
        Thread t2 = new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("hello thread2");
            }
        });
        t1.start();
        t2.start();
    }
}

public class TestDemo15 {
    public static void main(String[] args) {
        //其实就是使用lambad表达式代替Runnable
        Thread t1 = new Thread(()->{
            //()表示无参的run()方法
            System.out.println("hello thread1");
        });

    }
}

public class TestDemo16 {
    public static void func1() throws InterruptedException {
        long big = System.currentTimeMillis();
        //串行执行
        Thread t = new Thread(()->{
            long a = 0;
           for(long i = 0;i<10_0000_0000;i++){
               a++;
           }
        });
        t.start();
        t.join();
        long end = System.currentTimeMillis();
        System.out.println("串行消耗时间:" + (end - big) + "ms");
    }
    public static void func2() throws InterruptedException {
        long big = System.currentTimeMillis();
        Thread t1 = new Thread(()->{
            long b = 0;
        for(long i = 0;i< 10_0000_0000 / 2;i++){
            b++;
        }
        });
        t1.start();
        Thread t2 = new Thread(()->{
            long c = 0;
            for(long i = 0;i<10_0000_0000/ 2;i++){
                c++;
            }
        });
        t2.start();
        t1.join();
        t2.join();
        long end = System.currentTimeMillis();
        System.out.println("并行执行消耗时间:" + (end - big) + "ms");
    }
    public static void main(String[] args) throws InterruptedException {
        func1();//串行执行
        func2();//并行执行
    }
}

public class TestDemo17 {
    public static void main(String[] args) {
        //给线程器名字
        Thread t1 = new Thread(()->{
            while(true) {
                System.out.println("hello thread1");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"thread1");

        Thread t2 = new Thread(()->{
            while(true) {
                System.out.println("hello thread2");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"thread2");
        t1.start();
        t2.start();
    }
}

public class TestDemo18 {
    public static void main(String[] args) {
        Thread t = new Thread(()->{
            System.out.println("hello thread");
        });
        t.start();
        System.out.println(t.isDaemon());
    }
}
//因为我们创建的是一个前台线程，所以返回false

public class TestDemo22 {<!--{C}%3C!%2D%2D%20%2D%2D%3E--> public static void main(String[] args) throws InterruptedException {<!--{C}%3C!%2D%2D%20%2D%2D%3E--> Thread t = new Thread(()->{<!--{C}%3C!%2D%2D%20%2D%2D%3E--> for(int i = 0;i<5;i++){<!--{C}%3C!%2D%2D%20%2D%2D%3E--> System.out.println("hello thread"); try {<!--{C}%3C!%2D%2D%20%2D%2D%3E--> Thread.sleep(1000); } catch (InterruptedException e) {<!--{C}%3C!%2D%2D%20%2D%2D%3E--> e.printStackTrace(); } } }); t.start(); t.join();//main线程调用t.join()方法，main线程就处于阻塞状态，当t线程执行完后，唤醒main线程执行后序代码 System.out.println("hello main"); }}

public class TestDemo23 {
    public static void main(String[] args) {
         Thread t = new Thread(){
             @Override
             public void run() {
                 //获取当前线程的引用
                 //System.out.println(Thread.currentThread().getName());
                 //因为当前使用的匿名内部类是继承自Thread类，Thread就是该匿名内部类的父类，所以可以通过this得到当前Thread的实例
                 System.out.println(this.getName());
             }
         };
         t.start();
    }
}