Java多线程基础（线程与进程的区别，线程的创建方式及常用api，线程的状态）

public class Method1 {
    public static void main(String[] args) {
        MyThread t1 = new MyThread(); //创建MyThread的实例
        t1.start(); //调用start方法，才会真正创建操作系统中的线程，并申请系统调度执行
    }
    public static class MyThread extends Thread {
        //必须重写run方法描述线程要执行的任务
        @Override
        public void run() {
            System.out.println("创建方式1");
        }
    }
}

public class Method2 {
    public static void main(String[] args) {
        //先创建Runnable对象，然后当作参数传入Thread的构造方法中
        Thread t2 = new Thread(new MyRunnable());
        t2.start();
    }
    //Runnable接口，表示定义线程任务对象（Thread才是线程本身）
    public static class MyRunnable implements Runnable {
        @Override
        public void run() {
            System.out.println("创建方式2");
        }
    }
}

public class Method3 {
    public static void main(String[] args) {
        Thread t3 = new Thread() {
            @Override
            public void run() {
                System.out.println("匿名内部类创建Thread子类对象");
            }
        };
        t3.start();
    }
}

public class Method4 {
    public static void main(String[] args) {
        Thread t4 = new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("使用匿名内部类创建Runnable子类对象");
            }
        });
        t4.start();
    }
}

public class Method5 {
    public static void main(String[] args) {
        Thread t5 = new Thread(() -> System.out.println("lambda表达式创建"));
        t5.start();
    }
}

Thread t1 = new Thread();
 Thread t2 = new Thread(new MyRunnable());
 Thread t3 = new Thread("名字1");
 Thread t4 = new Thread(new MyRunnable(),"名字2");

public class Interrupt {
    private static boolean isStop = false; //标记位
    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    while(!isStop){
                        //每一秒钟打印一次
                        //如果线程处于休眠状态就不会被中断（如休眠100秒）
                        Thread.sleep(1000);
                        System.out.println("hello word");
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });
        t.start();
        //让t线程运行3秒中在中断
        Thread.sleep(3000);
        isStop = true;
    }
}

public class Demo {
    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread(() -> {
            while(!Thread.currentThread().isInterrupted()){
                System.out.println("执行中");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                    System.out.println("执行收尾操作");
                    break;
                }
            }
        });
        t.start();
        Thread.sleep(3000);
        t.interrupt();
    }
}