w3

BankAccount.java

@@ -0,0 +1,40 @@
+public class BankAccount {
+    private int accountNumber;
+    private String ownerName;
+    private double balance;
+    public BankAccount(int accountNumber,String ownerName,double balance) {
+        this.accountNumber = accountNumber;
+        this.balance = balance;
+        this.ownerName = ownerName;
+    }
+        public int getAccountNumber() {
+            return accountNumber;
+        }
+        public String getOwnerName() {
+            return ownerName;
+        }
+        public void setOwnerName(String ownerName) {
+            this.ownerName = ownerName;
+        }
+        public double getBalance() {
+            return balance;
+        }
+        //业务方法：存款
+        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");
+            }
+        }
+        //业务方法：取款
+        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("余额不足或金额无效");
+            }
+        }
+}