线程同步_synchronized

//数据共享
package projict05;

import java.util.ArrayList;


public class test31{
    
    public static void main(String[] args) {
        TicketSaler t1=new TicketSaler("窗口一");
        TicketSaler t2=new TicketSaler("窗口二");
        
        t1.start();
        t2.start();
    }
    
}

class TicketSaler extends Thread{//只能单继承
    private static TicketService ts=new TicketService();//静态
    
    public TicketSaler(String name) {
        super(name);
    }
    
    public synchronized static void saleOneTicket() {//静态
        if(ts.hasTicket()) {//用于安全检查
            try {
                    Thread.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println(Thread.currentThread().getName()+ts.sale());
            }
    }
    public void run() {
        
        while(ts.hasTicket()) {
                saleOneTicket();
            }
        }            
    }        
class TicketService {
   private ArrayList<String> all;
   
   public TicketService() {
       all=new ArrayList<String>();
       for(int i=1;i<=100;i++) {
           all.add("ticket:"+i);
       }
   }
   
   public boolean hasTicket() {
       return all.size()>0;
   }
   
   public String sale() {
       return all.remove(0);
   }
}

package projict06;

import java.util.ArrayList;

public class test32 {
    public static void main(String[] args) {
        MyRun my=new MyRun();
        
        Thread t1=new Thread(my,"窗口一");
        Thread t2=new Thread(my,"窗口二");
        
        t1.start();
        t2.start();
    }
}
class MyRun implements Runnable{//可实现多接口
    private TicketService ts=new TicketService();//非静态
    
    public synchronized  void saleOneTicket() {//非静态
        if(ts.hasTicket()) {//用于安全检查
            try {
                    Thread.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println(Thread.currentThread().getName()+ts.sale());
            }
    }
    public void run() {        
        while(ts.hasTicket()) {            
                saleOneTicket();
            }
        }        
    }
class TicketService {
       private ArrayList<String> all;
       
       public TicketService() {
           all=new ArrayList<String>();
           for(int i=1;i<=100;i++) {
               all.add("ticket:"+i);
           }
       }
       
       public boolean hasTicket() {
           return all.size()>0;
       }
       
       public String sale() {
           return all.remove(0);
       }
    }