Question

我想删除数组中每个单词的所有元音。所以我想出了这个：

public class AnotherExercise {

public static void main (String[] args){

    String[] intruments = {"cello", "guitar", "violin", "double bass"}; //the array of words
    String[] vowels = {"a", "e", "i", "o", "u"}; // the array of vowels
    String[] intruments2 = new String[5]; //the array of wrods without vowels
    String nothing = ""; // used to replace a vowel to nothing

    for (int i = 0; i < 4; i++){  // first for loop to go through all of the intruments

        for(int e = 0; e < 5; e++){ //second for loop to go through all the vowels

        intruments2[i] = intruments[i].replaceAll(vowels[e], nothing); //replacing vowels
        //and storing them in a new array
        }

        System.out.println(intruments2[i]); //outputting the words without vowels
    }

}

}

从我尝试的所有选项中，我猜这一个是最好的，但我仍然无法使它工作，它输出：

    cello
    gitar
    violin
    doble bass

我认为最奇怪的部分是它确实取代了“你”。这可能是一个愚蠢的错误，但我无法弄明白。

Answer 1

方法字符串。ReplaceAll接收正则表达式作为第一个参数。它允许您一次性删除所有元音：

    public class AnotherExercise {

    public static void main (String[] args){

        String[] intruments = {"cello", "guitar", "violin", "double bass"};
        String[] intruments2 = new String[5];
        String nothing = "";

        for (int i = 0; i < 4; i++){

            intruments2[i] = intruments[i].replaceAll("a|e|i|o|u", nothing);

            System.out.println(intruments2[i]);
        }

    }

}

而且，是的，关于您的版本的问题。在内部循环中，您始终将替换应用于字符串的初始版本。所以你只能从最后一次尝试得到结果 - 字母'你'。

循环内部的循环/替换不能使它们工作

1 个答案: