用charArray小写制作元音

Question

第一次在这里投递，所以我有这样的分配:我们编写一个代码，读取一个文件并将它写到另一个文件中，但大写除外，但是我们也需要添加一个语句来避免元音大写。

Main：

import java.io.FileNotFoundException;

public class Main {

    public static void main(String[] args) throws FileNotFoundException {
    // write your code here
    String iFilePath, oFilePath;
            iFilePath = "C:\\Users\\flame\\Desktop\\New folder\\FileforRead.txt";
            oFilePath = "C:\\Users\\flame\\Desktop\\New folder\\FileforWrite.txt";
    UpperCaseFile ucf = new UpperCaseFile(iFilePath, oFilePath);


    }
}

UpperCaseFile类：

package com.company;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
import java.lang.String;

import static java.lang.Character.toLowerCase;

public class UpperCaseFile {

    public UpperCaseFile(String iFile, String oFile) throws FileNotFoundException {
        String input;
        String output;


        File file;
        file = new File(iFile);
        Scanner inputFile = new Scanner(file);

        PrintWriter outputFile = new PrintWriter(oFile);

        while (inputFile.hasNext()) {
            input = inputFile.nextLine();

            output = input.toUpperCase();

            outputFile.println(output);

            char[] charArray = iFile.toCharArray();


            for (int i = 0; i < charArray.length; i++)
            {
                if ( charArray[i] == 'a' || charArray[i] == 'e' ||
                        charArray[i] == 'i' || charArray[i] == 'o' ||
                        charArray[i] == 'u')
                {
                    charArray[i] = Character.toLowerCase(charArray[i]);

                }

           inputFile.close();
            outputFile.close();
            }


        }
    }
}

老实说，我似乎找不到错误，至少我的IDE没有这么说，它总是以退出代码1结束这个过程。非常感谢您的所有帮助。

Answer 1

我增加了评论，你需要做什么，以及你在这里做了什么错事。试着编写我在评论中说过的代码。如果你面临任何问题，请在这里发表评论，这样会有所帮助。我没有为问题提供代码，因为它是赋值。

while (inputFile.hasNext()) {
        input = inputFile.nextLine();

        output = input.toUpperCase();
        // here you will do, what you want to do.
        // you will take output string and find vowel and convert those 
        // into lowercase. Keep in mind that all characters along with
        // vowels are already capitals, so find all capital vowels and convert 
        // those to lowercase
        // after above operation you can write into outputfile

        outputFile.println(output);
        // this is not doing what you are doing
        /* char[] charArray = iFile.toCharArray();


        for (int i = 0; i < charArray.length; i++)
        {
            if ( charArray[i] == 'a' || charArray[i] == 'e' ||
                    charArray[i] == 'i' || charArray[i] == 'o' ||
                    charArray[i] == 'u')
            {
                charArray[i] = Character.toLowerCase(charArray[i]);

            }*/
        //You need to close file after doing operations.
        // these lines should not be in while
       //inputFile.close();
       // outputFile.close();
        }