如何複製從另一個類傳遞給另一個類的對象？

Question

我有一個構造函數需要傳遞給另一個類的對象。我正在使用線程，我需要共享某個變量給所有的線程。

我需要在構造函數中使用BankExample對象，並將其複製，以便我可以將它傳遞給run方法中的撤回方法調用（在事務類中）。

傳球看起來有點像這樣。

主類-----> runnable類---->動作類。

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(...)幾乎是你可能想要做到的。只需創建更相關的另一種方法。