package atmsystem;
    import java.io.Serializable;

    // 这个User类，目的只是为了记录User.txt(数据库)中的一行信息：帐号-密码-余额
    public class User implements Serializable {
    /*
     建议：
    除了｛私有属性(无参数、有参数构造方法)、属性对应的get、set ｝之外
     类实现一个序列化接口，添加一个序列化版本号.
    因为万一未来有用的时候，不至于要改代码.
     直接一步到位
    File—>Settings—>Editor—>Inspections—>Java
     —>Serialization issues—>Serializable class without ‘serialVersionUID’
    */
     private static final long _serialVersionUID = 1406005760612010227L;

    1. private String aname;<br />    private String apassword;<br />    private Float abalance;
    3. // 构造方法<br />    public User(){}<br />    public User(String aname, String apassword, Float abalance) {<br />        this.aname = aname;<br />        this.apassword = apassword;<br />        this.abalance = abalance;<br />    }
    5. public String getAname() {<br />        return aname;<br />    }<br />    public void setAname(String aname) {<br />        this.aname = aname;<br />    }<br />    public String getApassword() {<br />        return apassword;<br />    }<br />    public void setApassword(String apassword) {<br />        this.apassword = apassword;<br />    }<br />    public Float getAbalance() {<br />        return abalance;<br />    }<br />    public void setAbalance(Float abalance) {<br />        this.abalance = abalance;<br />    }<br />}