Answer to followup question on https://stackoverflow.com/questions/36618399/how-do-i-start-a-new-line-after-a-period-question-mark-and-exclamation-point/36618517

TextSplitter.java

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

public class TextSplitter {

    public static void main(String[] args) {
        // These are just two lines that you have read from a file:
        String firstLine = "hello? bartender. can I have a drink!whiskey please.";
        String secondLine = "another. line.";

        // This is a list containing all the two lines you have read:
        List<String> lines = Arrays.asList(firstLine, secondLine);

        // This is the list that will contain all the new lines:
        List<String> result = new ArrayList<>();

        // Looping through the two lines
        for (String line : lines) {
            // Adding newlines after punctuation marks followed by a space:
            line = line.replace("? ", "?\n").replace("! ", "!\n").replace(". ", ".\n");

            // Splitting the line by the newly created newline characters:
            String[] resultingLinesAfterReplacement = line.split("\n");

            // Looping through the resulting lines:
            for (String resultingLine : resultingLinesAfterReplacement)
                // Adding them to the result list:
                result.add(resultingLine.substring(0, 1).toUpperCase() + resultingLine.substring(1));
        }

        // Print the result:
        System.out.println(result);
    }

}