preface
As one of the tools of java Concurrent Programming, the exchange only supports data exchange between two threads. When thread A needs to exchange its own data with thread B internally, after calling exchange(), it will automatically block and wait for the other thread's data to arrive, and then exchange. It uses CAS mechanism to realize data exchange.
Simple validation usage
public class UseExchange {
private static final Exchanger<Set<String>> exchange = new Exchanger<Set<String>>();
public static void main(String[] args) {
new Thread(new Runnable() {
@Override
public void run() {
Set<String> setA = new HashSet<String>();//Container for data
try {
/*Add data*/
setA.add("a");
setA.add("b");
setA.add("c");
Set<String> setB = exchange.exchange(setA);//Exchange set
/*Process the exchanged data*/
System.out.println("Printing setA and setB Data after exchange:");
for (String s : setB){
System.out.println(s);
}
System.out.println("=============In exchange setB================");
} catch (InterruptedException e) {
}
}
}).start();
new Thread(new Runnable() {
@Override
public void run() {
Set<String> setB = new HashSet<String>();//Container for data
try {
/*Add data*/
setB.add("d");
setB.add("e");
setB.add("f");
Set<String> setA = exchange.exchange(setB);//Exchange set
/*Process the exchanged data*/
System.out.println("Printing setB and setA Data after exchange:");
for (String s : setA){
System.out.println(s);
}
System.out.println("=============In exchange setA================");
} catch (InterruptedException e) {
}
}
}).start();
}
}Output results
