import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public
class Executors2 {
public static
void main(String[] args) throws ExecutionException, InterruptedException, TimeoutException {
// test1();
// test2();
test3();
}
private static
void test3() throws InterruptedException, ExecutionException, TimeoutException {
ExecutorService executor = Executors.newFixedThreadPool(
1);
Future<Integer> future = executor.submit
(() -> {
try {
TimeUnit.SECONDS.sleep(2);
return 123;
}
catch (InterruptedException e) {
throw new IllegalStateException("task interrupted", e);
}
});
future.get(1, TimeUnit.SECONDS);
}
private static void test2() throws InterruptedException, ExecutionException {
ExecutorService executor = Executors.newFixedThreadPool(1);
Future<Integer> future = executor.submit(() -> {
try {
TimeUnit.SECONDS.sleep(1);
return 123;
}
catch (InterruptedException e) {
throw new IllegalStateException("task interrupted", e);
}
});
executor.shutdownNow();
future.get();
}
private static void test1() throws InterruptedException, ExecutionException {
ExecutorService executor = Executors.newFixedThreadPool(1);
Future<Integer> future = executor.submit(() -> {
try {
TimeUnit.SECONDS.sleep(1);
return 123;
}
catch (InterruptedException e) {
throw new IllegalStateException("task interrupted", e);
}
});
System.out.println("future done: " + future.isDone());
Integer result = future.get();
System.out.println("future done: " + future.isDone());
System.out.print("result: " + result);
executor.shutdownNow();
}
}
转载于:https://www.cnblogs.com/bilaisheng/p/10210906.html
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