mediregistersyn.java

java课件及例程有一些PPT及一些例程

class Reg{
    public synchronized int modify(int number, int maxnum){
      try{
    	   if(number<maxnum){   
            
            	Thread.sleep((int)(Math.random()*1000));
                number++;
                System.out.println(Thread.currentThread().getName()+",您的挂号成功，号码是第"+number+"位！");
           }
           else 
                System.out.println(Thread.currentThread().getName()+",今天挂号已满！");
         }catch(InterruptedException e)
         {
             System.out.println(e.getMessage());
         } 
         return number ;
    }	
}
public class MediRegisterSyn implements Runnable{
    int number;
    private int maxnum=40;
    Reg rr;
    MediRegisterSyn(Reg r){
        rr = r;	
    }
    public void setMaxnum(int mx){
        maxnum = mx;
    }
    public int getMaxnum(){
        return maxnum;
    }
    public  void run(){
    	synchronized(rr){
        
    	    number = rr.modify(number,maxnum);
         }
    }
    public static void main(String[] args){
    	Reg r = new Reg();
        MediRegisterSyn theReg = new MediRegisterSyn(r);
        theReg.setMaxnum(2);
        Thread myRegister1 = new Thread(theReg,"Mary");
        Thread myRegister2 = new Thread(theReg,"Lily");
        Thread myRegister3 = new Thread(theReg,"Tom");
        myRegister1.start();
        myRegister2.start();
        myRegister3.start();
        
    }   
}