JAVA5线程并发库[8]-Exchanger(转)-优快云博客

本文通过一个简单的示例展示了Java并发编程中Exchanger类如何用于实现两个线程之间的数据交换，强调了Exchanger在解决特定需求场景中的应用价值。

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用于实现两个线程之间的数据交换，每个人在完成一定的事务后想与对方交换数据，第一个先拿出数据的人要一直等待第二个人拿着数据到来时，才能彼此交换数据

import
 java.util.concurrent.Exchanger;

import
 java.util.concurrent.ExecutorService;

import
 java.util.concurrent.Executors;

public
 class
 ExchangerTest {

public
 static
 void
 main(String[] args) {

ExecutorService service = Executors.newCachedThreadPool();

final
 Exchanger<String> exchanger = 
new
 Exchanger<String>();

service.execute(
new
 Runnable() {

public
 void
 run() {

try
 {

String data1 = 
"MacBook Pro"
;

System.out.println(
"线程"
 + Thread.currentThread().getName()

+ 
"正在把数据"
 + data1 + 
"换出去"
);

Thread.sleep((
long
) (Math.random() * 
10000
));

String data2 = (String) exchanger.exchange(data1);

System.out.println(
"线程"
 + Thread.currentThread().getName()

+ 
"换回的数据为"
 + data2);

} 
catch
 (Exception e) {

}

}

});

service.execute(
new
 Runnable() {

public
 void
 run() {

try
 {

String data1 = 
"8000RMB"
;

System.out.println(
"线程"
 + Thread.currentThread().getName()

+ 
"正在把数据"
 + data1 + 
"换出去"
);

Thread.sleep((
long
) (Math.random() * 
10000
));

String data2 = (String) exchanger.exchange(data1);

System.out.println(
"线程"
 + Thread.currentThread().getName()

+ 
"换回的数据为"
 + data2);

} 
catch
 (Exception e) {

}

}

});

service.shutdown();

}

}