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JavaSE/JavaThread/TicketThread.java at master · goder/JavaSE · GitHub
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TicketThread.java
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/*
* 功能：测试多线程，售票，线程安全问题，通过synchronized (Object)对象锁实现线程安全同步
*/
package
com
.
bj
.
thread
;
/*
* 功能：模拟多个窗口取票，验证取票是否会出现线程安全问题
*/
import
javax
.
swing
.
plaf
.
synth
.
SynthSpinnerUI
;
public
class
TicketThread
{
public
static
void
main
(
String
[]
args
) {
// TODO Auto-generated method stub
//定义三个窗口
TicketWindow
tw1
=
new
TicketWindow
();
//TicketWindow tw2=new TicketWindow();
//TicketWindow tw3=new TicketWindow();
Thread
t1
=
new
Thread
(
tw1
);
Thread
t2
=
new
Thread
(
tw1
);
Thread
t3
=
new
Thread
(
tw1
);
t1
.
start
();
t2
.
start
();
t3
.
start
();
}
}
//售票窗口
class
TicketWindow
implements
Runnable
{
//票数
private
int
nums
=
2000
;
//private DogI di=new DogI();
public
void
run
(){
while
(
true
){
//出票速度,1s一张
try
{
Thread
.
sleep
(
1000
);
}
catch
(
InterruptedException
e
) {
// TODO Auto-generated catch block
e
.
printStackTrace
();
}
//认为if else 要保证其原子性,加对象锁，保证锁内同步代码进行
synchronized
(
this
) {
//先判断是否还有票
if
(
nums
>
0
){
System
.
out
.
println
(
Thread
.
currentThread
().
getName
()+
"在售出第"
+(
nums
)+
"票"
);
nums
--;
}
else
{
//售票结束
break
;
}
}
}
}
}
class
DogI
{
public
DogI
(){
System
.
out
.
println
(
"Dog"
);
}
}
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