gistfile1.java

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

public class SortingString {
    public static void main(String args[]) {
        String s = "typewriter";

        final long start = System.currentTimeMillis();

        for (int i = 0; i < Integer.MAX_VALUE; i++) {
            s = shuffle(s);

            if (s.equals("eeiprrttwy")) {
                System.out.println(s);
                break;
            }

            if (i == Integer.MAX_VALUE - 1)
                i = 0;
        }

        final long end = System.currentTimeMillis();

        System.out.println("It takes " + (end - start) + " milliseconds.");
    }

    private static String shuffle(String input) {
        List<Character> characters = new ArrayList<Character>();
        for(char c:input.toCharArray()){
            characters.add(c);
        }
        StringBuilder output = new StringBuilder(input.length());
        while (characters.size() != 0) {
            int randPicker = (int)(Math.random()*characters.size());
            output.append(characters.remove(randPicker));
        }
        return output.toString();
    }
}

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