Question

所以我创建了这个程序来操作用户提供的单词作为输入，通过将第一个字符移动到单词的结尾，然后将单词的其余部分向后拼写，然后检查原始单词和新词是一样的。它被设计为运行直到用户输入单词“quit”作为所选单词。我已经设法让大部分代码都能正常工作，除了在检查前一个代码之后循环回去询问用户一个新单词，它只是继续运行。我目前得到的代码如下：

package uploadTask9_wordPlay;

import java.util.Scanner;

public class wordPlay {

    public static void main(String[] args) {
        // creates scanner object to get a name from the user input
        Scanner userInput = new Scanner(System.in);

            System.out.println("Enter a name to be tested, or 'quit' to exit 
program: ");
            // stores the user input into string testedName
            String testedName = userInput.nextLine();

            // if the user input is "quit", program exits
            if (testedName.equals("quit")) {
                System.out.println("Thanks for using the program");
                System.exit(0);
            }

            // else, do the rest of the code with the given word
            else {

                while (testedName != "quit") {

            // takes first character from userInput
            char firstLetter = testedName.charAt(0);

            // removes first character from testedName
            StringBuilder removeChar = new StringBuilder(testedName);
            removeChar.deleteCharAt(0);

            // adds first character of testedName to the end of removeChar
            String newString = removeChar.toString() + firstLetter;

            // prints newString backwards
            String reverseWord = new 
StringBuffer(newString).reverse().toString();

            // if statement - far simpler way to carry this task out than loops
            // if statement to check if the words are the same
            if (testedName.equals(reverseWord)) { 
                System.out.println(testedName + " is the same as " + reverseWord); }

            else {  
                System.out.println(testedName + " is not the same as " + reverseWord); }

        }   
    }       
}
}

有没有人知道为什么程序每次检查一个单词时都不会循环回到开头？

Answer 1

不要比较这样的字符串：

testedName != "quit"

这样做：

!testedName.equals("quit")

循环程序在完成后返回到起点

1 个答案: