java/W3/封装 .java

public class BankAccount {
    private 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 this.accountNumber;
    }

    public String getOwnerName() {
        return this.ownerName;
    }

    public void setOwnerName(String ownerName) {
        this.ownerName = ownerName;
    }

    public double getBalance() {
        return this.balance;
    }

    public void deposit(double amount) {
        if (amount > 0) {
            this.balance += amount;
            System.out.println("存款成功，存入金额：" + amount);
        } else {
            System.out.println("存款失败：金额必须大于0");
        }
    }

    public void withdraw(double amount) {
        if (amount > 0 && amount <= this.balance) {
            this.balance -= amount;
            System.out.println("取款成功，取出金额：" + amount);
        } else {
            System.out.println("取款失败：金额必须大于0且不超过当前余额");
        }
    }
}