java - 尝试从字符串中删除字符

Question

我正在尝试从随机生成的 20 个字母单词中删除元音。我必须使用子字符串来完成这项作业，但在概念上我遇到了问题。使用此代码，单词的值永远不会改变并保持其原始值。当我对字符串的后半部分执行 i+2 时，它会跳转两个字符，并且当两个元音紧接着一个时，它会变得困惑。如果我必须使用子字符串，我怎样才能改进它每次都能工作。

public class WordsWithoutVowels {
    String finalWord;

    public WordsWithoutVowels(String word) {
        for(int i = 0; i < 20; i++) {
            if(word.charAt(i) == 'a') {word = word.substring(0, i) + word.substring(i++);} 
            if(word.charAt(i) == 'e') {word = word.substring(0, i) + word.substring(i++);} 
            if(word.charAt(i) == 'i') {word = word.substring(0, i) + word.substring(i++);} 
            if(word.charAt(i) == 'o') {word = word.substring(0, i) + word.substring(i++);} 
            if(word.charAt(i) == 'u') {word = word.substring(0, i) + word.substring(i++);} 
            if(word.charAt(i) == 'y') {word = word.substring(0, i) + word.substring(i++);}        
            System.out.println(word);
        }
        finalWord = word;
    }

    public String getWord()
    {
        return finalWord;
    }
}

Answer 1

您可以使用下面的简化代码来执行此操作:

public static void main(String[] args) {
        String stringPara = "this example will remove the vowals aeiou";
        stringPara = removeCharFromString(stringPara, "a");
        stringPara = removeCharFromString(stringPara, "e");
        stringPara = removeCharFromString(stringPara, "i");
        stringPara = removeCharFromString(stringPara, "o");
        stringPara = removeCharFromString(stringPara, "u");
        System.out.println(stringPara);
    }

    public static String removeCharFromString(String str, String characterToRemove){
        while(str.contains(characterToRemove)){
            str = str.substring(0, str.indexOf(characterToRemove)) + str.substring(str.indexOf(characterToRemove)+1, str.length()) ;
        }
        return str;
    }