为什么我会得到重复的抽象子类数组数据？

Question

我正在尝试将抽象类的子类对象存储在数组中。

我没有收到错误消息，但在调用打印数组信息时，我只看到最后一个用户输入帐户的5个重复项。但是，在输入数据时，在提示输入时，每个输入的输出是唯一的。我认为嵌套在for循环中的if / else语句中出现了问题（如下所示）。

为了节省空间，我的代码将略有删节。

编辑1：这是我的第一个问题，如果我能改进它，请告诉我！

// BankAccountTest

public class BankAccountTest {
  int numAccHolders = in.nextInt();
  BankAccount[] bankaccounts = new BankAccount[numAccHolders];
  BankAccount.generateAccountDetails(bankaccounts, numAccHolders);

// BankAccount

public abstract class BankAccount {
  protected static double balance;
  protected static int accNum;
  protected static int accType;

  public BankAccount(double balance, int accNum, int accType){
    this.balance = balance; 
    this.accNum = accNum; 
    this.accType = accType;
  }

  public getBalance(){
    return balance;
  }
  public getAccNumber(){
    return accNumber;
  }

  public static void generateAccountDetails(BankAccount[] bankaccounts, 
    int numAccHolders){
    for(int i = 0; i < numAccHolders; i++){
      accNum = (i + 1);
      int accType = in.nextInt();
      double balance = in.nextDouble();

      if(accType == 1){ 
        bankaccounts[i] = new ChequingsAccount(balance, accNum, accType);
      } else if (accType == 2) {
        bankaccounts[i] = new SavingsAccount(balance, accNum, accType);
      }

// ChequingsAccount

public class ChequingsAccount extends BankAccount {
  public ChequingsAccount(double balance, int accNum, int accType)
  super(balance, accNum, accType);

// SavingsAccount

public class SavingsAccount extends BankAccount {
public SavingsAccount(double balance, int accNum, int accType)
super(balance, accNum, accType);

Answer 1

BankAccount.balance，BankAccount.accNum，BankAccount.accType属性不应该是静态的。它们在所有实例之间共享。