多線程實現買票功能

方法一:

 

public class SellTicket extends Thread {
 private static int tickets=1000;
 public void run(){
  while(tickets>0){
   System.out.println(currentThread().getName()+"sell:"+tickets);
   tickets--;
  }
 }
}

SellTicket sellTicket1=new SellTicket();
  SellTicket sellTicket2=new SellTicket();
  SellTicket sellTicket3=new SellTicket();
  sellTicket1.start();
  sellTicket2.start();
  sellTicket3.start();

 

方法二:

 

public class SellTicketRun implements Runnable {
 private int tickets=1000;
 Object obj=new Object();
 @Override
 public void run() {
  while(tickets>0){

    //同步代碼塊
   synchronized (obj) {
    if(tickets>0){
     try {
      Thread.sleep(10);
     } catch (InterruptedException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
     }
     System.out.println(Thread.currentThread().getName()+"sell:"+tickets);
     tickets--;
    }
   }
   
  }
  
 }

}

 

 

SellTicketRun sellTicketRun=new SellTicketRun();
  Thread th1=new Thread(sellTicketRun);
  Thread th2=new Thread(sellTicketRun);
  Thread th3=new Thread(sellTicketRun);
  th1.start();
  th2.start();
  th3.start();

 

多線程繼承Thread和實現runnable方式的區別：避免單繼承的侷限性，

繼承Thread：線程代碼存放Thread子類run方法中，

實現runnable：線程方法存放在接口的子類的run方法中