To parse twitter message

twitterParser.java

import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Paths;

/**
 * Created by yapiti on 07/09/15.
 */
public class Main {

    public static void main(String[] args) throws IOException {
        String text=readFile(args[0], Charset.defaultCharset());
        int maxWidth=Integer.parseInt(args[1]);

        int pageCount=process(text.length(), maxWidth);

        int last=0;
        for(int i=1; i<= pageCount; i++) {
            StringBuilder stringBuilder=new StringBuilder();

            int end=Math.min(last+maxWidth-lengthFor(i, pageCount), text.length());
            String subText=text.substring(last, end);

            stringBuilder.append(subText);
            stringBuilder.append(toString(i, pageCount));

            System.out.println(stringBuilder.toString());

            last=end;
        }
    }

    private static int process(int lengthText, int max) {
        int pageCount=lengthText/max;
        int newPageCount= calculPageCount(lengthText, pageCount, max);

        while (pageCount != newPageCount) {
            pageCount = newPageCount;

            newPageCount=calculPageCount(lengthText, pageCount, max);
        }

        return pageCount;
    }

    private static int calculPageCount(int lengthText, int pageCount, int max) {
        double newPageCount=((double) (lengthText+lengthPaginationFor(pageCount))) / max;

        return (int) Math.ceil(newPageCount);
    }

    private static int lengthPaginationFor(int pageCount) {
        int total=0;

        for(int i=1; i <= pageCount; i++) {
            total+=lengthFor(i, pageCount);
        }

        return total;
    }

    private static int lengthFor(int i, int totalPage) {
        return toString(i, totalPage).length();
    }

    private static String toString(int i, int totalPage) {
        return " "+Integer.toString(i)+"/"+Integer.toString(totalPage);
    }

    private static String readFile(String path, Charset encoding) throws IOException {
        byte[] encoded = Files.readAllBytes(Paths.get(path));
        return new String(encoded, encoding);
    }
}