From 3d1fbc9e561df91dc5b10d1308737c3d4fcce83e Mon Sep 17 00:00:00 2001
From: ZhengJiayin <13230092115@163.com>
Date: Wed, 25 Mar 2026 12:52:13 +0800
Subject: [PATCH] =?UTF-8?q?feat(w3):=20=E5=AE=8C=E6=88=90BankAccount?=
 =?UTF-8?q?=E7=B1=BB=E5=B0=81=E8=A3=85=EF=BC=8C=E5=AE=9E=E7=8E=B0=E5=AD=98?=
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---
 w3/BankAccount.java | 63 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 w3/BankAccount.java

diff --git a/w3/BankAccount.java b/w3/BankAccount.java
new file mode 100644
index 0000000..c24d04f
--- /dev/null
+++ b/w3/BankAccount.java
@@ -0,0 +1,63 @@
+public class BankAccount {
+    // 私有属性
+    private final String accountNumber;
+    private String ownerName;
+    private double balance;
+    
+    // 构造方法
+    public BankAccount(String accountNumber, String ownerName) {
+        this.accountNumber = accountNumber;
+        this.ownerName = ownerName;
+        this.balance = 0.0;
+    }
+    
+    // Getter 方法
+    public String getAccountNumber() {
+        return accountNumber;
+    }
+    
+    public String getOwnerName() {
+        return ownerName;
+    }
+    
+    public double getBalance() {
+        return balance;
+    }
+    
+    // Setter 方法
+    public void setOwnerName(String ownerName) {
+        this.ownerName = ownerName;
+    }
+    
+    // 存款操作
+    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("存款金额必须大于 0");
+        }
+    }
+    
+    // 取款操作
+    public void withdraw(double amount) {
+        if (amount > 0) {
+            if (amount <= balance) {
+                balance -= amount;
+                System.out.println("取款成功！当前余额：" + balance);
+            } else {
+                System.out.println("余额不足，无法取款");
+            }
+        } else {
+            System.out.println("取款金额必须大于 0");
+        }
+    }
+    
+    // 显示账户信息
+    public void displayInfo() {
+        System.out.println("账号：" + accountNumber);
+        System.out.println("户主：" + ownerName);
+        System.out.println("余额：" + balance);
+        System.out.println();
+    }
+}
\ No newline at end of file