异步执行多个java方法，并获得完成作业的结果。

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.*;

public class AsyncJavaMethods {

    public static void main(String[] args) throws InterruptedException, ExecutionException {
        ExecutorService executor = Executors.newFixedThreadPool(5);

        List<Future<String>> results = new ArrayList<>();

        // 异步执行多个Java方法
        results.add(executor.submit(new Task1()));
        results.add(executor.submit(new Task2()));
        results.add(executor.submit(new Task3()));

        // 等待所有任务完成
        executor.shutdown();
        executor.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);

        // 获取每个任务的执行结果
        for (Future<String> result : results) {
            System.out.println(result.get());
        }
    }

    static class Task1 implements Callable<String> {
        @Override
        public String call() throws Exception {
            // 执行任务1的逻辑
            return "Task1 completed";
        }
    }

    static class Task2 implements Callable<String> {
        @Override
        public String call() throws Exception {
            // 执行任务2的逻辑
            return "Task2 completed";
        }
    }

    static class Task3 implements Callable<String> {
        @Override
        public String call() throws Exception {
            // 执行任务3的逻辑
            return "Task3 completed";
        }
    }
}