package thread;
import java.util.concurrent.locks.*;/*** @author Alina* @date 2021年12月20日 11:07 下午* JDK5新特性* import java.util.concurrent.locks 包* lock接口*      void lock() 获取锁，进同步*      void unlock () 释放锁，出同步***/
class Tickerts implements Runnable{private Lock l = new ReentrantLock();private int  ticketnum = 100;public void run(){while(true){try{l.lock();if(ticketnum>0){Thread.sleep(100);System.out.println(Thread.currentThread().getName()+"..."+"出售的票数为："+ticketnum);ticketnum--;}}catch (Exception e ){}finally {l.unlock();}}}}
public class LockDemo {public static void main(String[] args) {Tickerts ti = new Tickerts();Thread t0 = new Thread(ti);Thread t1 = new Thread(ti);Thread t2 = new Thread(ti);t0.start();t1.start();t2.start();}}

package thread;/*** @author Alina* @date 2021年12月20日 11:55 下午*/
class A_lock{public static A_lock A_lock = new A_lock();
}
class B_lock{public static B_lock B_lock = new B_lock();
}
class DeadLock implements Runnable {private boolean love ;public DeadLock(boolean love) {this.love = love;}public void run(){while (true){if(love){synchronized (A_lock.A_lock){System.out.println("A");synchronized (B_lock.B_lock){System.out.println("B");}}}else {synchronized (B_lock.B_lock){System.out.println("B");synchronized (A_lock.A_lock){System.out.println("A");}}}}}
}
public class DeadDome {public static void main(String[] args) {DeadLock d0 = new DeadLock(true);DeadLock d1  = new DeadLock(false);Thread t0 = new Thread(d0);Thread t1 = new Thread(d1);t0.start();t1.start();}
}