java/W3/BankAccount.java

public class BankAccount {
    private final String accountNumber; 
    private String ownerName;
    private double balance;
    public BankAccount(String accountNumber, String ownerName) {
        this.accountNumber = accountNumber;
        this.ownerName = ownerName;
        this.balance = 0.0;
    }
    public String getAccountNumber() {
        return accountNumber;
    }
    public String getOwnerName() {
        return ownerName;
    }
    public void setOwnerName(String ownerName) {
        this.ownerName = ownerName;
    }
    public double getBalance() {
        return balance;
    }
    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");
        }
    }
    public void withdraw(double amount) {
        if (amount <= 0) {
            System.out.println("取款失败！金额必须大于0");
        } else if (amount > balance) {
            System.out.println("取款失败！余额不足");
        } else {
            balance -= amount;
            System.out.println("取款成功！当前余额：" + balance);
        }
    }
    public void showAccountInfo() {
        System.out.println("账户号：" + accountNumber + "，户主：" + ownerName + "，余额：" + balance);
    }
}