Java中的继承 - "找不到符号构造函数"

ben*_*wad 10 java polymorphism inheritance

我正在从一个继承自另一个类的类,但我收到一个编译错误,说"找不到符号构造函数Account()".基本上我要做的是创建一个类别的InvestmentAccount,它来自账户 - 账户是为了与取款/存款方法保持平衡,而InvestmentAccount类似,但余额存储在股票中,股票价格决定如何在给定特定金额的情况下,许多股票被存入或取出.这是子类InvestmentAccount的前几行(编译器指出问题的位置):

public class InvestmentAccount extends Account
{
    protected int sharePrice;
    protected int numShares;
    private Person customer;

    public InvestmentAccount(Person customer, int sharePrice)
    {
        this.customer = customer;
        sharePrice = sharePrice;
    }
    // etc...
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Person类保存在另一个文件(Person.java)中.现在这里是超类帐户的前几行:

public class Account 
{
    private Person customer;
    protected int balanceInPence;

    public Account(Person customer)
    {
        this.customer = customer;
        balanceInPence = 0;
    }
    // etc...
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有没有理由为什么编译器不只是从Account类中读取Account的符号构造函数?或者我是否需要在InvestmentAccount中为Account定义一个新的构造函数,它告诉它继承所有内容?

谢谢

Joh*_*iss 25

super(customer)InvestmentAccounts构造函数中使用.

Java无法知道如何调用唯一的构造函数Account,因为它不是一个空的构造函数.super()仅当基类具有空构造时,才可以省略.

更改

public InvestmentAccount(Person customer, int sharePrice)
{
        this.customer = customer;
        sharePrice = sharePrice;
}
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public InvestmentAccount(Person customer, int sharePrice)
{
        super(customer);
        sharePrice = sharePrice;
}
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那可行.