Question

我正在学习java作为初学者，我正在尝试创建一个计算未来年龄的程序。

我遇到以下问题：

错误：（14,64）java：找不到符号符号：方法getYear（） location：class ageProgram

我似乎无法获得我的getter方法eventho它们被宣布为公开。

ageProgram.java：

import java.util.Scanner;

public class ageProgram {
    public static void main(String[]args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.println("enter your birth year");
        int yearBirth = keyboard.nextInt();
        System.out.println("enter a (future) year");
        int yearTo = keyboard.nextInt();

        ageCalculator agecalculator = new ageCalculator(yearBirth, yearTo);

        if (yearBirth > yearTo) {
            System.out.println("You will be born in %s years", getYear());
        } else {
            System.out.println("You are %s years old", getYear());
        }
    }
}

ageCalculator.java：

public class ageCalculator {
        public ageCalculator(int yearBirth, int yearTo) {
            if (yearBirth > yearTo) {
                int year = (yearBirth - yearTo);
                year = year.toString();
            } else {
                int year = (yearTo - yearBirth);
                year = year.toString();
            }
        }
        public String getYear() {
            return year;
        }
        }

我不确定我做错了什么......我试图在stackoverflow上检查类似/其他问题的解决方案，但似乎没有任何效果。

感谢您的帮助！

Answer 1

您必须告诉您所指的方法getYear是哪个对象。在您的示例中，您必须将getYear称为agecalculator.getYear()，一切都应该没问题。

Answer 2

试试这个

ageProgram.java

import java.util.Scanner;

public class ageProgram {
    public static void main(String[]args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.println("enter your birth year");
        int yearBirth = keyboard.nextInt();
        System.out.println("enter a (future) year");
        int yearTo = keyboard.nextInt();

        ageCalculator agecalculator = new ageCalculator(yearBirth, yearTo);

        if (yearBirth > yearTo) {
            System.out.format("You will be born in %s years", agecalculator.getYear());
        } else {
            System.out.format("You are %s years old", agecalculator.getYear());
        }
    }
}

ageCalculator.java

public class ageCalculator {
    String yearText;
    public ageCalculator(int yearBirth, int yearTo) {
        if (yearBirth > yearTo) {
            int year = (yearBirth - yearTo);
            yearText = String.valueOf(year);
        } else {
            int year = (yearTo - yearBirth);
            yearText = String.valueOf(year);
        }
    }
    public String getYear() {
        return yearText;
    }
}

如果你不理解，我可以解释

编辑：我最初没有得到它，但上面的答案也是正确的。你应该使用agecalculater.getYear（）来调用方法编辑：你应该用大写字母开始一个类名。你可以使用

yearText = String.valueOf(yearBirth - yearTo);

而不是

int year = (yearTo - yearBirth);
yearText = String.valueOf(year);

无法解决getter方法

2 个答案: