同步方法和同步代码块()

package edu.wtbu;//不安全的买票public class Demo08 {    public static void main(String[] args) {        buyTicket buyTicket = new buyTicket();        new Thread(buyTicket,"我").start();        new Thread(buyTicket,"你").start();        new Thread(buyTicket,"黄牛党").start();    }}class buyTicket implements Runnable{    private int ticketNums=10;//票    boolean flag=true;//外部停止方式    @Override    public void run() {        //买票        while (flag){            try {                //模拟延时                Thread.sleep(1000);                buy();            } catch (InterruptedException e) {                throw new RuntimeException(e);            }        }    }    //synchronized 同步方法，锁的是this    public synchronized void  buy() throws InterruptedException {        //判断是否有票        if(ticketNums<=0){            flag=false;            return;        }        //买票        System.out.println(Thread.currentThread().getName()+"拿到了"+ticketNums--);    }}/*synchronized代码块synchronized(obj){ */
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package edu.wtbu;//不安全的买票public class Demo08 {    public static void main(String[] args) {        buyTicket buyTicket = new buyTicket();        new Thread(buyTicket,"我").start();        new Thread(buyTicket,"你").start();        new Thread(buyTicket,"黄牛党").start();    }}class buyTicket implements Runnable{    private int ticketNums=10;//票    boolean flag=true;//外部停止方式    @Override    public void run() {        //买票        while (flag){            try {                //模拟延时                Thread.sleep(1000);                buy();            } catch (InterruptedException e) {                throw new RuntimeException(e);            }        }    }    //synchronized 同步方法，锁的是this    public synchronized void  buy() throws InterruptedException {        //判断是否有票        if(ticketNums<=0){            flag=false;            return;        }        //买票        System.out.println(Thread.currentThread().getName()+"拿到了"+ticketNums--);    }}/*synchronized代码块synchronized(obj){ */