java - 继续获取预期的错误类，接口(interface)或枚举

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已关闭8年。




我看不到这门简短的课的问题。我得到8类，接口(interface)或枚举预期的错误。谢谢

public class BankAccount {
public BankAccount {
    private double balance = 0;
}
public BankAccount(double balanceIn) {
    private double balance = balanceIn;
}

public double checkBalance {
    return balance;
}

public void deposit(double amount) {
    if(amount > 0) balance += amount;
}

public void withdraw(double amount) {
    if(amount <= balance) balance -= amount;
}
}

最佳答案

您在构造函数中声明了修饰符和字段。将其放置在ctor外部

public BankAccount(double balanceIn) {
    private double balance = 0;
}

应该

public class BankAccount
{
    private double balance = 0;
    public BankAccount(){}
}

public BankAccount {
    private double balance = 0;
}

也错了..它不是构造函数，您缺少()并删除

private double balance = 0;

关于java - 继续获取预期的错误类，接口(interface)或枚举，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/12892718/