java - 为什么我的密码打印不正确？

Question

我正在尝试编写一个程序，该程序接受输入文件密码，对其进行加密，然后将其保存到另一个文件中，同时仍处于加密状态。到目前为止，我已经获得了创建文件的程序，并且对于密码中的每个字母，它将替换该字母。问题是对于密码中的每个字母，我打印出密码而不是字母表中的字符。我想将我的密码“淘汰”，并且对于每个字母，更改为不同的随机字母。例如“fallout”到“dfljsor”。我认为问题出在我的打印行上，我该如何解决它？

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

public class WriteFile {

    public static void main(String [] args) throws IOException {
        java.io.File inputFile = new java.io.File("inputFile.txt");
        java.io.File outputFile = new java.io.File("encrypted.txt");

        //create files and write to files
        try(Scanner input = new Scanner(inputFile);  
            PrintWriter output = new PrintWriter(outputFile);) {
            //creating array that holds the abc's
            //password is tombraider
            String key[] = { "q","w","r","t","u","i","o",
                             "p","a","s","d","f","g","h",
                             "j","k","l","z","x","c","v",
                             "b","n","m" };
            String key1[] = { "qwertyuiopasdfghjklzxcvbnm" };

            while (input.hasNext()) {
                String x = input.nextLine();

                //select a random char in key
                double number = Math.random() * 27;
                String index = key1.toString();
                char sort = index.charAt((int) number);

                // for each letter in the password, it is to be replaced with sort 
                for (int i = 0; i < x.length(); i++) {
                    char select = ((char) i);
                    output.print(x.replace(select, sort));
                }     
            } 
        }    
    }      
}

Answer 1

我没有足够高的代表来发表评论(我是故意的)。但看来您正在使用x.replace(select, sort)。您已将 x 设置为整行。您可能想要做的事情是类似 Character.toString(x.charAt(i)).replace(select, sort)) 或类似的事情。这样你就可以得到每个字符，而不是整行。