如何将从另一个类传递的对象复制到另一个类？

Question

我在构造函数中有一个对象需要传递给另一个类。我正在使用线程，我需要向所有线程共享某个变量。

我需要在构造函数中获取BankExample对象，然后复制它，以便我可以将它传递给run方法中的withdraw方法调用（在事务类中）。

传球看起来有点像这样。

主类-----＆gt; runnable类----＆gt;行动课。

 public class WithdrawThread implements Runnable {
    //I take in a thread numer so i can tell which threads run in the terminal. 
   transaction withdraw = new transaction();
    int threadNum;
    int balance = 0;
    public WithdrawThread(int num, BankExample bal){
        threadNum = num;

    }

    public void run(){
        //calls the withdraw method in transaction because i have a single method that takes care of  reducing the balance amount. 

        withdraw.withdraw(threadNum, balance );
    }
}

Answer 1

WithdrawThread(...)几乎就是你想要的方式。只需创建更相关的另一种方法。