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Remove main and add tests for CountWords (#4210)

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This commit is contained in:
Piotr Idzik
2023-06-02 18:28:33 +02:00
committed by GitHub
parent 22002c9939
commit ad03086f54
2 changed files with 59 additions and 26 deletions
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47
src/main/java/com/thealgorithms/others/CountWords.java
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@ -3,32 +3,34 @@ package com.thealgorithms.others;
import java.util.Scanner;
/**
* You enter a string into this program, and it will return how many words were
* in that particular string
*
* @author Marcus
*/
public class CountWords {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Enter your text: ");
String str = input.nextLine();
System.out.println("Your text has " + wordCount(str) + " word(s)");
System.out.println(
"Your text has " + secondaryWordCount(str) + " word(s)"
);
input.close();
final public class CountWords {
private CountWords() {
}
private static int wordCount(String s) {
/**
* @brief counts the number of words in the input string
* @param s the input string
* @return the number of words in the input string
*/
public static int wordCount(String s) {
if (s == null || s.isEmpty()) {
return 0;
}
return s.trim().split("[\\s]+").length;
}
private static String removeSpecialCharacters(String s) {
StringBuilder sb = new StringBuilder();
for (char c : s.toCharArray()) {
if (Character.isLetterOrDigit(c) || Character.isWhitespace(c)) {
sb.append(c);
}
}
return sb.toString();
}
/**
* counts the number of words in a sentence but ignores all potential
* non-alphanumeric characters that do not represent a word. runs in O(n)
@ -37,17 +39,10 @@ public class CountWords {
* @param s String: sentence with word(s)
* @return int: number of words
*/
private static int secondaryWordCount(String s) {
if (s == null || s.isEmpty()) {
public static int secondaryWordCount(String s) {
if (s == null) {
return 0;
}
StringBuilder sb = new StringBuilder();
for (char c : s.toCharArray()) {
if (Character.isLetter(c) || Character.isDigit(c)) {
sb.append(c);
}
}
s = sb.toString();
return s.trim().split("[\\s]+").length;
return wordCount(removeSpecialCharacters(s));
}
}