Variable Number of Nested For Loops

Question

I\'m making a word unscrambler in java. Right now I have a program that can print all rearrangements of 3 letters chosen from a word with 3 or more letters (no repeats). So for

Answer 1

Based on what @DrYap said, I wrote this (it's a little different than his):

Here is the code to start it off:

for(int i = 1; i <= len; i++)
{
    newWords.add(new ArrayList());
    loop(i);
}

Here is the loop method. A lot of the variables were declared as instance variables so I don't have to pass them into the parameter:

public static void loop(int level)
{
    if (level == 0)
    {
        int pos = indices.size() - 1;
        int pos2 = newWords.get(pos).size();
        newWords.get(pos).add("");
        for (Integer letIndex : indices)
        {
            String previous = newWords.get(pos).get(pos2);
            newWords.get(pos).set(pos2, previous + lets.get(letIndex));
        }
    }
    else
    {
        for (int i = 0; i < len; i++)
        {
            if (!indices.contains(i))
            {
                int indicesIndex = indices.size();

                indices.add((Integer) i);
                loop(level - 1);
                indices.remove(indicesIndex);
            }
        }
    }
}