在Java中以其他方法使用局部声明的变量 [英] Using local declared variables in a different method in Java

问题描述

我在做作业时遇到了一些困难，长话短说，我在一个方法中声明了两个局部变量，我需要在方法之外访问这些变量:

I am having a little difficulty with a school assignment, long story short I declared two local variables in a method and I need to access those variables outside the method :

 public String convertHeightToFeetInches(String input){

    int height = Integer.parseInt(input); 
    int resultFeet = height / IN_PER_FOOT;
    int resultInches = height % IN_PER_FOOT;
    Math.floor(resultInches);
    return input;
}

我将不得不以其他方法打印以下字符串:

I would have to print the following string in a different method :

    System.out.println("Height: " + resultFeet + " feet " + resultInches + " inches");

有什么建议吗?

谢谢.

推荐答案

您不能在定义的范围之外访问局部变量.您需要更改方法返回的值

You can't access local variables outside of the scope they are defined. You need to change what is return by the method

首先定义一个容器类来保存结果...

Start by defining a container class to hold the results...

public class FeetInch {

    private int feet;
    private int inches;

    public FeetInch(int feet, int inches) {
        this.feet = feet;
        this.inches = inches;
    }

    public int getFeet() {
        return feet;
    }

    public int getInches() {
        return inches;
    }

}

然后修改方法以创建并返回它...

Then modify the method to create and return it...

public FeetInch convertHeightToFeetInches(String input) {
    int height = Integer.parseInt(input);
    int resultFeet = height / IN_PER_FOOT;
    int resultInches = height % IN_PER_FOOT;
    Math.floor(resultInches);
    return new FeetInch(resultFeet, resultInches);
}

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