removing vowels from array-CodePudding

The instructions >>
Implement the method named removeVowels which processes the array of strings named words by printing each string from words with only non-vowels on its own line.

For example, if words contains:

{"every", "nearing", "checking", "food", "stand", "value"}

The method should output:

vry
nrng
chckng
fd
stnd
vl

So far, I have:

public class U6_L3_Activity_Two {
  public static void removeVowels(String[] hit_str) {
    char vowels = {
      'a',
      'e',
      'i',
      'o',
      'u',
      'A',
      'E',
      'I',
      'O',
      'U'
    };
    for (int i = 0; i < hit_str.length; i  ) {
      if (find(vowels.begin(), vowels.end(),
          hit_str[i]) != vowels.end()) {
        hit_str = hit_str.replace(i, 1, "");
        i -= 1;
      }
    }
    return hit_str;
  }
}

Runner:

import java.util.Scanner;

public class runner_U6_L3_Activity_Two
{
  public static void main(String[] args)
  {
    Scanner scan = new Scanner(System.in);
    System.out.println("Enter array length:");
    int len = scan.nextInt();
    scan.nextLine();
    String[] wordList = new String[len];
    System.out.println("Enter values:");
    for(int i = 0; i < len; i  )
    {
      wordList[i] = scan.nextLine();
    }
    U6_L3_Activity_Two.removeVowels(wordList);
  }
}

The error message i'm getting says:

U6_L3_Activity_Two.java:3: error: illegal initializer for char
char vowels = {
^

I've tried a bunch of different ways to make a list of vowels but none of them seem to work.

CodePudding user response：

Try replacing vowels with this built-in method:

String[] hit_str = { "every", "nearing", "checking", "food", "stand", "value" };

for (String str : hit_str) {
    System.out.println(str.replaceAll("[AaEeIiOoUu]", ""));
}

Here, the for loop iterates over your input string/s and uses Regex to check if char(s) is/are found from the provided Regex. [AaEeIiOoUu] tries to match all chars of Regex individually in the string chars. Using Regex is better than declaring a char[] as it improves code readability and saves us from writing complex logics.

CodePudding user response：

There're many way to do this. I reccomen to split 2 tasks: remove vowels and print the results.

In case you are able to modife the original array, you can avoid creation of the new one.

public static String[] removeVowels(String[] words) {
    String[] res = new String[words.length];

    for (int i = 0; i < words.length; i  ) {
        String word = words[i];

        StringBuilder buf = new StringBuilder(word.length());

        for (int j = 0; j < word.length(); j  ) {
            char ch = word.charAt(j);
            char lowerCase = Character.toLowerCase(ch);

            if (lowerCase != 'a' && lowerCase != 'e'
                    && lowerCase != 'i' && lowerCase != 'o'
                    && lowerCase != 'u')
                buf.append(ch);
        }

        res[i] = buf.toString();
    }

    return res;
}