java - 将线程积添加到数组

Question

我必须将线程池的对象添加到ArrayList中，以便计算我的线程池创建的对象总数。为此，我创建了一个 ArrayList，在执行线程池后，我将该对象添加到 ArrayList。我的问题是，新的线程池会覆盖 Arraylist 中的现有对象，因此无论代码运行多少次，Arraylist 将始终保持相同的大小。

我的ArrayList:

 protected ArrayList<Runnable> ComponentBuild = new ArrayList<>();

线程启动的位置:

public void tireComponent() {
    Menu menu = new Menu();
    ExecutorService executor = Executors.newFixedThreadPool(3);
    //  ThreadPoolExecutor executor = new ThreadPoolExecutor();

    for (int i = 1; i <= 3; i++) {
        Runnable tire = new Tire("" + i);
        executor.execute(tire);
        ComponentBuild.add(tire);
        System.out.println(ComponentBuild);
        if (ComponentBuild.size() == MAX_CAPACITY) {
            sleep();
        }
    }

轮胎类别:

public class Tire implements Runnable, Component {

    private String number;

    public Tire(String Number) {
        this.number = Number;
    }

    @Override
    public void run() {
        System.out.println("Tire number " + number + " has now begun creation");

        processCommand();

        System.out.println("Thread " + Thread.currentThread().getName() + " has now created number " + number + " tire");
    }

    private void processCommand() {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    @Override
    public String toString() {
        return this.number;
    }
}

终端结果:

You have the following options: 
1) Create normal trie
2) Create winter tire
3) Create premium tire
1
[1]
Tire number 1 has now begun creation
[1, 2]
Tire number 2 has now begun creation
[1, 2, 3]

You have the following options: 
1) Create normal trie
2) Create winter tire
3) Create premium tire
Tire number 3 has now begun creation
Thread pool-1-thread-2 has now created number 2 tire
Thread pool-1-thread-1 has now created number 1 tire
Thread pool-1-thread-3 has now created number 3 tire
1
[1]
Tire number 1 has now begun creation
[1, 2]
Tire number 2 has now begun creation
[1, 2, 3]
You have the following options: 
1) Create normal trie
2) Create winter tire
3) Create premium tire
Tire number 3 has now begun creation
Thread pool-2-thread-1 has now created number 1 tire
Thread pool-2-thread-2 has now created number 2 tire
Thread pool-2-thread-3 has now created number 3 tire

我希望输出是这样的

Tire number 2 has now begun creation
[1, 2, 3, 4, 5, 6]

但实际输出是第二个线程池覆盖数组中的现有对象，因此无论我运行代码多少次，ArrayList 将始终是:

[1, 2, 3]

编辑:根据要求，我的组件接口(interface):

package Model;

public interface Component {

 void run();
 String toString();
}

Answer 1

您只运行循环三次“for (int i = 1; i <= 3; i++)”，因此它只有三次。如果您想要更多，则需要增加循环大小。