string - Remove punctuation java -

i'm trying remove punctuation string keep spaces, need able distinguish different words. end goal find length of each word in string.

i set for loop check length of word until hits space count punctuation letter. know have change variable in if statement reflect length of substring between i , indexof space in string.

for(int i=0; > stringlength - 1;){ original.substring(i, original.indexof(' ')); if(i > minlength) 

while might tempting throw bunch of fors , ifs, cleaner use regular expression:

pattern.compile("[.,; ]+").splitasstream(input) 

a full example:

import java.util.regex.pattern; import java.util.stream.collectors;  public class counting {     public static void main(string... args) {         string text = "this string. punctuation, care words.";          string wordswithlengths = pattern.compile("[.,; ]+")                 .splitasstream(text)                 .map(word -> word + " => " + word.length())                 .collect(collectors.joining("\n"));          system.out.println(wordswithlengths);     } } 

output:

this => 4 => 2 => 1 string => 6 => 4 => 4 punctuation => 11 => 3 => 1 => 4 care => 4 => 5 words => 5 

also, if want count how many words have more n characters can:

import java.util.regex.pattern;  public class countingwords {     public static void main(string... args) {         string text = "this string. punctuation, care words.";          int threshold = 5;         long amountofwords = pattern.compile("[.,; ]+")                 .splitasstream(text)                 .filter( word -> word.length() > threshold)                 .count();          system.out.println("there " + amountofwords +  " words more " + threshold + " characters");     } }