上传文件至 'W7'

W7/Account.java

@@ -0,0 +1,31 @@
+public class Account {
+    private double balance;
+
+    public Account(double balance) {
+        this.balance = balance;
+    }
+
+    public void withdraw(double amount) throws InsufficientFundsException {
+        if (amount > balance) {
+            throw new InsufficientFundsException(balance);
+        }
+        balance -= amount;
+        System.out.println("取款成功，当前余额: " + balance);
+    }
+
+    public static void main(String[] args) {
+        Account account = new Account(1000.0);
+        
+        try {
+            account.withdraw(1500.0);
+        } catch (InsufficientFundsException e) {
+            System.out.println("取款失败: " + e.getMessage() + "，当前余额: " + e.getBalance());
+        }
+
+        try {
+            account.withdraw(500.0);
+        } catch (InsufficientFundsException e) {
+            System.out.println("取款失败: " + e.getMessage() + "，当前余额: " + e.getBalance());
+        }
+    }
+}

W7/InsufficientFundsException.java

@@ -0,0 +1,12 @@
+public class InsufficientFundsException extends Exception {
+    private double balance;
+
+    public InsufficientFundsException(double balance) {
+        super("余额不足");
+        this.balance = balance;
+    }
+
+    public double getBalance() {
+        return balance;
+    }
+}