tehtava1

import java.awt.List;
import java.util.ArrayList;
import java.util.Arrays;

public class Tehtava1 {

	public static void main(String[] args) {
		trimAndSaveSmileys("Moi! :) Mitä (ihmettä?) sinulle kuuluu tänään (; =D D= :/ :{");
	}
	public static ArrayList<String> trimAndSaveSmileys(String str){
		//split every word
		String [] strings = str.split(" ");
		//Add all combinations that are considered as smileys
		ArrayList<String> allowedSmileys = new ArrayList<>(Arrays.asList(
				":)",
				";)",
				"(:",
				"(;",
				"=D",
				"D=",
				":/",
				":{")
				);
		ArrayList<String> fixedStrList = new ArrayList<String>();
		boolean smileyFound;
		for(int i=0;i<strings.length;i++){
			//check if word is one of allowed smileys
			smileyFound = false;
			for (String smiley : allowedSmileys) {
				if(strings[i].equals(smiley)){
					smileyFound = true;
				}
			}
			if(smileyFound == true){
				//smiley no need to trim
				fixedStrList.add(strings[i]);
			} else {
				//not smiley so replace everything except numbers and letters
				strings[i] = strings[i].replaceAll("[^a-zA-Z0-9äÄöÖ]", "");
				fixedStrList.add(strings[i]);
			}

		}
		System.out.println(fixedStrList);
		return fixedStrList;
	}
}