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| An example of Exchanger. |
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import java.util.concurrent.Exchanger;
class ExgrDemo {
public static void main(String args[]) {
Exchanger<String> exgr = new Exchanger<String>();
new UseString(exgr);
new MakeString(exgr);
}
}
class MakeString implements Runnable {
Exchanger<String> ex;
String str;
MakeString(Exchanger<String> c) {
ex = c;
str = new String();
new Thread(this).start();
}
public void run() {
char ch = 'A';
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 5; j++)
str += (char) ch++;
try {
str = ex.exchange(str);
} catch (InterruptedException exc) {
System.out.println(exc);
}
}
}
}
class UseString implements Runnable {
Exchanger<String> ex;
String str;
UseString(Exchanger<String> c) {
ex = c;
new Thread(this).start();
}
public void run() {
for (int i = 0; i < 3; i++) {
try {
str = ex.exchange(new String());
System.out.println("Got: " + str);
} catch (InterruptedException exc) {
System.out.println(exc);
}
}
}
}
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