Get all the permutations of a string in Java

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What is the solution for getting all the permutations of a given string using a recursive method
May 10, 2018 in Java by Daisy
• 8,020 points
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This is the recursive way of finding a solution for this program:

public static void permutation(String str) { 
    permutation("", str); 
}
private static void permutation(String pre, String str) {
    int num = str.length();
    if (num == 0) System.out.println(pre);
    else {
        for (int i = 0; i < num; i++)
            permutation(pre + str.charAt(i), str.substring(0, i) + str.substring(i+1, num));
    }
}
answered May 10, 2018 by sharth
• 3,310 points

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