Java 如果用户键入Quit，则退出While循环

我正在编写一个拼写检查器程序，它将要求用户输入一个单词，并将其与我制作的数组中的单词列表进行比较

在用户键入

退出之前，此程序必须永不结束

所以我的问题是，当（>>此处您的条件始终为真时，我将如何放置
。如果您想在输入新猜测时对用户键入
“quit”
作出反应，您可以使用无限循环和
中断
，如下所示：

while (true) {
    System.out.println("Please every a word or QUIT to exit");
    String guess = input.nextLine();
    if (quit.equalsIgnoreCase(guess)) {
        break;
    }
    for(int i = 0; i < words.length; i++) {
        ...
    }
}

String quit = "quit"; 
//this is only declared as "quit" to get the loop to run for testing

    do {

        System.out.println("Please every a word or QUIT to exit");
        String guess = input.nextLine();

        for(int i = 0; i < words.length; i++) {

            if(guess.equals(words[i])) {

                System.out.println("That word is spelled correctly.");
            }   

            else {

                System.out.println("That word is not spelled correctly.");
                System.out.println("Would you like to add it to the dictionary? (Y/N)");
            }
        }   
    }

    while(!quit.equals("quit"));

System.out.println("Please enter a word or QUIT to exit");
String guess = input.nextLine();

while (!guess.equalsIgnoreCase("quit")) {
    for(int i = 0; i < words.length; i++) {
        if(guess.equals(words[i])) {
            System.out.println("That word is spelled correctly.");
        } else {
            System.out.println("That word is not spelled correctly.");
            System.out.println("Would you like to add it to the dictionary? (Y/N)");
        }
    }
    System.out.println("Please enter a word or QUIT to exit");
    String guess = input.nextLine();
}

while（true）{
System.out.println（“请每说一个字或退出退出”）；
字符串guess=input.nextLine（）；
if（quit.equalsIgnoreCase（猜测））{
打破
}
for（int i=0；i
我错了，使用“！=”会更好

在你的while中“quit.compareTo（guess）！=0”使用Do-while循环而不是简单的while循环

代码如下所示：

while (true) {
    System.out.println("Please every a word or QUIT to exit");
    String guess = input.nextLine();
    if (quit.equalsIgnoreCase(guess)) {
        break;
    }
    for(int i = 0; i < words.length; i++) {
        ...
    }
}

String quit = "quit"; 
//this is only declared as "quit" to get the loop to run for testing

    do {

        System.out.println("Please every a word or QUIT to exit");
        String guess = input.nextLine();

        for(int i = 0; i < words.length; i++) {

            if(guess.equals(words[i])) {

                System.out.println("That word is spelled correctly.");
            }   

            else {

                System.out.println("That word is not spelled correctly.");
                System.out.println("Would you like to add it to the dictionary? (Y/N)");
            }
        }   
    }

    while(!quit.equals("quit"));

System.out.println("Please enter a word or QUIT to exit");
String guess = input.nextLine();

while (!guess.equalsIgnoreCase("quit")) {
    for(int i = 0; i < words.length; i++) {
        if(guess.equals(words[i])) {
            System.out.println("That word is spelled correctly.");
        } else {
            System.out.println("That word is not spelled correctly.");
            System.out.println("Would you like to add it to the dictionary? (Y/N)");
        }
    }
    System.out.println("Please enter a word or QUIT to exit");
    String guess = input.nextLine();
}

String quit=“quit”；
//这仅声明为“退出”，以使循环运行以进行测试
做{
System.out.println（“请每说一个字或退出退出”）；
字符串guess=input.nextLine（）；
for（int i=0；i
您的while循环将继续，直到您将字符串quit更改为“quit”以外的内容。以下是一个示例：

while(quit.equals("quit")) {

    System.out.println("Please every a word or QUIT to exit");
    String guess = input.nextLine();

    for(int i = 0; i < words.length; i++) 
    {

        if(guess.equals(words[i])) 
        {
            System.out.println("That word is spelled correctly.");
        } 
        if(guess.equals("quit") {
            quit = "something_else";
        }  
        else
        {
            System.out.println("That word is not spelled correctly.");
            System.out.println("Would you like to add it to the dictionary? (Y/N)");
        }
}   
}

while（quit.equals（“quit”））{
System.out.println（“请每说一个字或退出退出”）；
字符串guess=input.nextLine（）；
for（int i=0；i
如果您必须在输入后立即退出，并且必须使用
while
条件来触发它，那么您的输入必须位于循环的末尾，以便在输入后立即检查该条件。您可以这样做：

while (true) {
    System.out.println("Please every a word or QUIT to exit");
    String guess = input.nextLine();
    if (quit.equalsIgnoreCase(guess)) {
        break;
    }
    for(int i = 0; i < words.length; i++) {
        ...
    }
}

String quit = "quit"; 
//this is only declared as "quit" to get the loop to run for testing

    do {

        System.out.println("Please every a word or QUIT to exit");
        String guess = input.nextLine();

        for(int i = 0; i < words.length; i++) {

            if(guess.equals(words[i])) {

                System.out.println("That word is spelled correctly.");
            }   

            else {

                System.out.println("That word is not spelled correctly.");
                System.out.println("Would you like to add it to the dictionary? (Y/N)");
            }
        }   
    }

    while(!quit.equals("quit"));

System.out.println("Please enter a word or QUIT to exit");
String guess = input.nextLine();

while (!guess.equalsIgnoreCase("quit")) {
    for(int i = 0; i < words.length; i++) {
        if(guess.equals(words[i])) {
            System.out.println("That word is spelled correctly.");
        } else {
            System.out.println("That word is not spelled correctly.");
            System.out.println("Would you like to add it to the dictionary? (Y/N)");
        }
    }
    System.out.println("Please enter a word or QUIT to exit");
    String guess = input.nextLine();
}

System.out.println（“请输入一个单词或退出以退出”）；
字符串guess=input.nextLine（）；
而（！guess.equalsIgnoreCase（“退出”））{
for（int i=0；i
使用以下条件：

if(StringUtils.equalsIgnoreCase(guess,"QUIT"))  {
    System.out.println("Quitting the loop");
    return
}

你说键入
QUIT
，但是
equals（）
不会忽略大小写。另外，如果你想让循环一直运行到有人键入QUIT，你可能需要在条件中使用
！
…使用
do while
循环，并检查
值是否不等于
相当
。
do{…}（！guess.equalsIgnoreCase（“quit”）；
这对使用
equals
没有好处。我建议我们退出.equalsIgnoreCase（guess）所以处理是不区分大小写的。@Gremash谢谢，
equalsIgnoreCase
确实会更好。@Gremash是的，我会回去解决这些小问题。我有一个习惯，就是根据我将如何使用程序来写，在这种情况下，我会知道总是大写“退出”。但我改变了它。谢谢。）@AndyFedoroff请停止为强调添加代码格式，请参阅并停止将所有内容置于引号中