在java中并行化任务的最简单方法是什么？

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

public class ParallelTasksExample {
    public static void main(String[] args) {
        // 创建两个异步任务
        CompletableFuture<Integer> task1 = CompletableFuture.supplyAsync(() -> {
            System.out.println("Task 1 started");
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("Task 1 completed");
            return 10;
        });

        CompletableFuture<Integer> task2 = CompletableFuture.supplyAsync(() -> {
            System.out.println("Task 2 started");
            try {
                Thread.sleep(1500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("Task 2 completed");
            return 20;
        });

        // 组合两个任务的结果
        CompletableFuture<Integer> combinedResult = task1.thenCombine(task2, (result1, result2) -> {
            System.out.println("Combining results");
            return result1 + result2;
        });

        // 获取最终结果
        try {
            int finalResult = combinedResult.get();
            System.out.println("Final result: " + finalResult);
        } catch (InterruptedException | ExecutionException e) {
            e.printStackTrace();
        }
    }
}