Make typoglycemia text with Java 8/lambda. Excercise from Jeffrey Zhao's blog: http://blog.zhaojie.me/2012/11/how-to-generate-typoglycemia-text.html

TestRandomizeString.java

import java.util.*;
import java.util.concurrent.*;

import static java.util.Comparators.comparing;

public class TestRandomizeString {
  public static void main(String[] args) {
    ThreadLocalRandom random = ThreadLocalRandom.current();
    String text = args[0];
    String result = String.join(" ",
      text.splitAsStream(" ")
          .map(
            s -> s.length() <= 3
                  ? s
                  :   s.charAt(0)
                    + s.substring(1, s.length() - 1)
                       .asChars()
                       .sorted(comparing((Character _) -> random.nextInt()))
                       .fold(
                         () -> new StringBuilder(s.length() - 2),
                         (sb, c) -> sb.append(c.charValue()),
                         (a, b) -> a)
                    + s.charAt(s.length() - 1)
          ).into(new ArrayList<String>()));
    System.out.println(result);
  }
}