public class TicketsSystem { /**
* @param args
*/
public static void main(String[] args) {
// TODO 自动生成方法存根
SellTickets st=new SellTickets();
new Thread(st).start();
try
{
Thread.sleep(1);
}
catch(Exception e)
{
e.printStackTrace();
}
st.b=true;
new Thread(st).start();
}}
class SellTickets implements Runnable
{
int tickets=100;
Object obj=new Object();
boolean b=false;
public void run()
{
if(b==false)
{
while(true)
{
sell();
}
}
else
{
while(true)
{
synchronized(obj)
{ if(tickets>0)
{
try{
Thread.sleep(10);
}catch(InterruptedException e)
{
e.getStackTrace();
}
System.out.println("obj:"+Thread.currentThread().getName()+"sell tickets:"+tickets);
tickets--;
}
}
}
}
}
public synchronized void sell()
{
if(tickets>0)
{
try
{
Thread.sleep(10);
}catch(Exception e)
{
e.getStackTrace();
}
System.out.println("sell:"+Thread.currentThread().getName()+"sell tickets:"+tickets);
tickets--;
}
}
}我本意想叫2个线程分别进入同步方法和同步块同时打印,可是结果是只在同步快里打印,不知道何故
望高手赐教应该怎么改。。多谢多谢
* @param args
*/
public static void main(String[] args) {
// TODO 自动生成方法存根
SellTickets st=new SellTickets();
new Thread(st).start();
try
{
Thread.sleep(1);
}
catch(Exception e)
{
e.printStackTrace();
}
st.b=true;
new Thread(st).start();
}}
class SellTickets implements Runnable
{
int tickets=100;
Object obj=new Object();
boolean b=false;
public void run()
{
if(b==false)
{
while(true)
{
sell();
}
}
else
{
while(true)
{
synchronized(obj)
{ if(tickets>0)
{
try{
Thread.sleep(10);
}catch(InterruptedException e)
{
e.getStackTrace();
}
System.out.println("obj:"+Thread.currentThread().getName()+"sell tickets:"+tickets);
tickets--;
}
}
}
}
}
public synchronized void sell()
{
if(tickets>0)
{
try
{
Thread.sleep(10);
}catch(Exception e)
{
e.getStackTrace();
}
System.out.println("sell:"+Thread.currentThread().getName()+"sell tickets:"+tickets);
tickets--;
}
}
}我本意想叫2个线程分别进入同步方法和同步块同时打印,可是结果是只在同步快里打印,不知道何故
望高手赐教应该怎么改。。多谢多谢
你把代码改一下: public static void main(String[] args) {
// TODO 自动生成方法存根
SellTickets st = new SellTickets();
st.b = true;
new Thread(st).start();
try {
Thread.sleep(1);
} catch (Exception e) {
e.printStackTrace();
}
new Thread(new SellTickets()).start(); }