49 lines
1.4 KiB
Java
49 lines
1.4 KiB
Java
package Others;
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import java.util.Scanner;
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/**
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* You enter a string into this program, and it will return how many words were
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* in that particular string
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*
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* @author Marcus
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*/
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public class CountWords {
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public static void main(String[] args) {
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Scanner input = new Scanner(System.in);
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System.out.println("Enter your text: ");
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String str = input.nextLine();
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System.out.println("Your text has " + wordCount(str) + " word(s)");
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System.out.println("Your text has " + secondaryWordCount(str) + " word(s)");
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input.close();
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}
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private static int wordCount(String s) {
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if (s == null || s.isEmpty())
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return 0;
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return s.trim().split("[\\s]+").length;
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}
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/**
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* counts the number of words in a sentence but ignores all potential
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* non-alphanumeric characters that do not represent a word. runs in O(n) where
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* n is the length of s
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*
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* @param s String: sentence with word(s)
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* @return int: number of words
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*/
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private static int secondaryWordCount(String s) {
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if (s == null || s.isEmpty())
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return 0;
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StringBuilder sb = new StringBuilder();
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for (char c : s.toCharArray()) {
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if (Character.isLetter(c) || Character.isDigit(c))
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sb.append(c);
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}
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s = sb.toString();
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return s.trim().split("[\\s]+").length;
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}
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}
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