import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

publicclass App {

    /**
     * 定义一个 10m 大的类
     */
    staticclass MyTask {
        // 创建一个 10m 的数组（单位转换是 1M -> 1024KB -> 1024*1024B）
        privatebyte[] bytes = newbyte[10 * 1024 * 1024];
    }

    // 定义 ThreadLocal
    privatestatic ThreadLocal<MyTask> taskThreadLocal = new ThreadLocal<>();

    // 测试代码
    public static void main(String[] args) throws InterruptedException {
        // 创建线程池
        ThreadPoolExecutor threadPoolExecutor =
                new ThreadPoolExecutor(5, 5, 60,
                        TimeUnit.SECONDS, new LinkedBlockingQueue<>(100));
        // 执行 n 次调用
        for (int i = 0; i < 10; i++) {
            // 执行任务
            executeTask(threadPoolExecutor);
            Thread.sleep(1000);
        }
    }

    /**
     * 线程池执行任务
     * @param threadPoolExecutor 线程池
     */
    private static void executeTask(ThreadPoolExecutor threadPoolExecutor) {
        // 执行任务
        threadPoolExecutor.execute(new Runnable() {
            @Override
            public void run() {
                System.out.println("创建对象");
                try {
                    // 创建对象（10M）
                    MyTask myTask = new MyTask();
                    // 存储 ThreadLocal
                    taskThreadLocal.set(myTask);
                    // 其他业务代码...
                } finally {
                    // 释放内存
                    taskThreadLocal.remove();
                }
            }
        });
    }
}