Question

import java.util.Random;

public class Test{
    public static void main(String[] args){
        final Random r = new Random();


        String ch = "aeiouycbdfgh";
        int len = r.nextInt(10) + 10;
        StringBuffer sb = new StringBuffer();
        for (int i=0; i<len; i++){
            sb.append(ch.charAt(r.nextInt(ch.length())));
        }
        System.out.println("String:" + sb);
        System.out.println("Vowels:");
        outputVowels(sb.toString());

    }


    public static void outputVowels(String s){

如何制作一个for循环，将每个ch字符串的元音输出到另一行？

编辑：该程序是输出一个 Ë 一世 Ø û

Answer 1

首先准备全球元音集 - 用于快速访问：

Set<Character> vowelSet = new HashSet<>();
vowelSet.addAll(Arrays.asList('a', 'e', 'i', 'o', 'u'));

其次，您可以像这样编写扫描循环：

String str = "ahjuekjdf";

for (int i=0; i<str.length(); i++) {
    char c = str.charAt(i);
    if(vowelSet.contains(c)) {
        System.out.println(c);
    }
}

Answer 2

您可以直接使用Regex

public class Test {
    public static void main(String[] args) {
        String s = "Ankur";
        s = s.replaceAll("[^aeiouAEIOU]", "");
        System.out.println(s);
    }
}

<强>输出

Au

Answer 3

将你的循环改为

for (int i=0; i<len; i++) {
    char c = sh.charAt(i);
    if ((c=='a')||(c=='e')||(c=='i')||(c=='o')||(c=='u')) {
        sb.append(ch.charAt(r.nextInt(ch.length())));
    }
}

Answer 4

 for(char v : vowel){
    if(ch == v){
        cout <<ch<<" is vowel";
        break;
    }
    else{
        cout <<ch<<" is consonant";
        break;
    }
}

使用For循环打印元音

4 个答案: