Revert "完成BankAccount作业"

This reverts commit a9e58175be.

BankAccount/src/BankAccount.java

@@ -1,53 +0,0 @@
-public class BankAccount {
-    // 私有属性（封装）
-    private final String accountNumber; // 账户号，创建后不可修改
-    private String ownerName;           // 户主姓名，可修改
-    private double balance;            // 余额，只能通过存取款修改
-
-    // 构造方法：必须传入账户号和户主姓名，初始余额为0
-    public BankAccount(String accountNumber, String ownerName) {
-        this.accountNumber = accountNumber;
-        this.ownerName = ownerName;
-        this.balance = 0.0;
-    }
-
-    // 存款方法
-    public void deposit(double amount) {
-        if (amount > 0) {
-            balance += amount;
-            System.out.println("存款成功！当前余额：" + balance);
-        } else {
-            System.out.println("存款失败！金额必须大于0。");
-        }
-    }
-
-    // 取款方法
-    public void withdraw(double amount) {
-        if (amount > 0 && amount <= balance) {
-            balance -= amount;
-            System.out.println("取款成功！当前余额：" + balance);
-        } else {
-            System.out.println("取款失败！金额必须大于0且不超过当前余额。");
-        }
-    }
-
-    // 查询余额
-    public double getBalance() {
-        return balance;
-    }
-
-    // 户主姓名 getter/setter（允许修改）
-    public String getOwnerName() {
-        return ownerName;
-    }
-
-    public void setOwnerName(String ownerName) {
-        this.ownerName = ownerName;
-    }
-
-    // 账户号 getter（无setter，保证不可修改）
-    public String getAccountNumber() {
-        return accountNumber;
-    }
-}
-