在java中对多个文件并行执行相同的操作

我是Java初学者，请帮我解决问题。 我想对文件中存在的模式执行基于哈希的搜索。这些模式在运行时提供。 搜索要在多个文件上执行，每个文件几乎有1MB。如果我在所有文件上连续执行搜索功能，它会花费很多时间。我想对所有这12个文件并行执行搜索操作。

---

请指导我如何缩短执行时间。

您可以使用

线程。它们彼此平行


这里有一个例子：

Thread thread = new Thread() {
      public void run(){
          //Here you put your code
      }
};
thread.start();

Thread thread = new Thread(() -> {
      //Here you put your code
});
thread.start();

public class MyThread extends Thread {
    public void run() {
        //Here you put your code
    }
}

//Then, in another class:

MyThread mt = new MyThread();
mt.start();

public class MyRunnable implements Runnable {
    public void run() {
        //Here you put your code
    }
}

//Then, in another class:

Thread th = new Thread(new MyRunnable());
th.start();


或者，如果您使用的是Java 8:

Thread thread = new Thread() {
      public void run(){
          //Here you put your code
      }
};
thread.start();

Thread thread = new Thread(() -> {
      //Here you put your code
});
thread.start();

public class MyThread extends Thread {
    public void run() {
        //Here you put your code
    }
}

//Then, in another class:

MyThread mt = new MyThread();
mt.start();

public class MyRunnable implements Runnable {
    public void run() {
        //Here you put your code
    }
}

//Then, in another class:

Thread th = new Thread(new MyRunnable());
th.start();


或创建一个
线程
子类并重写
run（）
方法：

Thread thread = new Thread() {
      public void run(){
          //Here you put your code
      }
};
thread.start();

Thread thread = new Thread(() -> {
      //Here you put your code
});
thread.start();

public class MyThread extends Thread {
    public void run() {
        //Here you put your code
    }
}

//Then, in another class:

MyThread mt = new MyThread();
mt.start();

public class MyRunnable implements Runnable {
    public void run() {
        //Here you put your code
    }
}

//Then, in another class:

Thread th = new Thread(new MyRunnable());
th.start();


或使类实现
Runnable
并重写
run（）
方法：

Thread thread = new Thread() {
      public void run(){
          //Here you put your code
      }
};
thread.start();

Thread thread = new Thread(() -> {
      //Here you put your code
});
thread.start();

public class MyThread extends Thread {
    public void run() {
        //Here you put your code
    }
}

//Then, in another class:

MyThread mt = new MyThread();
mt.start();

public class MyRunnable implements Runnable {
    public void run() {
        //Here you put your code
    }
}

//Then, in another class:

Thread th = new Thread(new MyRunnable());
th.start();



您也可以这样做。
如果不是10000 MB，您的机器可能有1000 MB的空间。在家里，我有一个超过100000 MB的内存。1 MB足够小，您不必担心大小。@PeterLawrey您有一台100 GB内存的机器吗？@weston My 9 yo有一台我的旧电脑，它是双屏幕的，有24 GB内存。我想是时候升级到256 GB了。我在家做了这个测试；）您可能有兴趣在
top
；）上查看超过1 TB虚拟内存的JVM是什么样子的@彼得·劳瑞：哈哈，我的笔记本电脑和台式电脑的总容量（22GB）比你的9Yo少！但至少相同数量的屏幕！有趣的阅读，谢谢。非常感谢你的帮助