java - 为什么我的 for 循环在检查元音时在第一个元素之后退出？ java

Question

我是 for 循环和增强型 for 循环的新手，所以也许有人可以帮助澄清为什么我的用于检查元音的增强型 for 循环仅在退出循环之前检查第一个元素？

我在 for 循环下面放置了一个 println(vowel) 来测试其输出，然后再检查输入，它只拉动“A”。辅音都工作得很好，所以我现在有点困惑。

任何可以为我指明正确方向或帮助我理解的内容都将不胜感激。

谢谢!

导入java.util.Scanner;

公共(public)类 WordStart {

public static void main(String[] args) {

    Scanner in=new Scanner(System.in);

    char[] consonants = {'B','C','D','F','G','H','J','K','L','M','N','P','Q','R','S','T','V','W','X','Y','Z'};
    char[] vowels = {'A','E','I','O','U'};
    System.out.println("Please enter a word: ");
    String word=in.nextLine();
    char firstLetter=(Character.toUpperCase(word.charAt(0)));
    int found = -1;




    for (char vowel: vowels)
{//System.out.println(vowel);
        if (firstLetter == vowel)
    {
        found = 1;
            if (found==1)
            {
                System.out.print(firstLetter+" is a vowel.\n");
                System.exit(0);
            }

    }
     for (char consonant: consonants)   
        {
            if (firstLetter == consonant)
            {
            found = 2;
                {
                    if (found==2)
                    {
                        System.out.print(firstLetter+" is a consonant.\n");
                        System.exit(0);

                    }

                }
            }    
        }
     if (found<=0)
     {
         System.out.println(firstLetter+" is not a vowel or consonant.\n");
         System.exit(0);
     }

}

这是正确的代码:

导入java.util.Scanner;公共(public)类 WordStart {

public static void main(String[] args) {
    Scanner in=new Scanner(System.in);

    char[] consonants = {'B','C','D','F','G','H','J','K','L','M','N','P','Q','R','S','T','V','W','X','Y','Z'};
    char[] vowels = {'A','E','I','O','U'};
    System.out.println("Please enter a word: ");
    String word=in.nextLine();
    char firstLetter=(Character.toUpperCase(word.charAt(0)));
    int found=0;

    for (char vowel:vowels)
    {
        if(firstLetter==vowel)
        {
            found=1;
            System.out.println(firstLetter+" is a vowel.");
            System.exit(0);

        }
    }

     for (char consonant: consonants)   
        {
            if (firstLetter == consonant)
            {
            found = 2;
            System.out.print(firstLetter+" is a consonant.\n");
            System.exit(0);
            }    
        }
     if (found<=0)
     {
         System.out.println(firstLetter+" is not a vowel or consonant.\n");
         System.exit(0);
     }       
}

}

格式根本不正确。清理完代码后我发现问题出在我自己的粗心上。

谢谢大家!

Answer 1

如果您希望程序继续执行，则需要删除 System.exit(0); 语句。

尝试更换

System.exit(0);

与

中断；

它将停止执行当前的 for 循环并开始下一个循环。