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| package cn.hlooc;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.*;
public class RaceTest implements Callable<String> {
private final Runner runner;
public RaceTest(Runner runner) {
this.runner = runner;
}
@Override
public String call() {
return runner.raceRun();
}
}
interface Runner {
String raceRun();
}
class Winner {
private static String win;
public static void setWinner(String name) {
if (win == null) {
win = name;
System.out.println(name + " is Winner.");
}
}
public static String getWinner() {
return win;
}
}
class Rabbit implements Runner {
@Override
public String raceRun() {
String name = Rabbit.class.getSimpleName();
for (int i = 0; i < 20; i++) {
try {
Thread.sleep(20);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(name + ": Run " + i + " step.");
}
Winner.setWinner(name);
return name;
}
}
class Tortoise implements Runner {
@Override
public String raceRun() {
String name = Tortoise.class.getSimpleName();
for (int i = 0; i < 20; i++) {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(name + ": Run " + i + " step.");
}
Winner.setWinner(name);
return name;
}
}
class M {
public static void main(String[] args) {
List<Runner> runnerList = new ArrayList<>(2);
runnerList.add(new Rabbit());
runnerList.add(new Tortoise());
ExecutorService es = Executors.newFixedThreadPool(2);
List<Future<String>> fs = new ArrayList<>();
runnerList.forEach(runner -> fs.add(es.submit(new RaceTest(runner))));
es.shutdown();
fs.forEach(future -> {
try {
System.out.println(future.get() + " has done.");
} catch (Exception e) {
e.printStackTrace();
}
});
}
}
|