Permutations of a string

Question

public class Permute {
    public static void main(String[] args) throws IOException {
        System.out.println(\"Enter a string\");
        BufferedReader bufReader =         


        

Answer 1

public class Permute {
    public static void main(String[] args) throws IOException {
        System.out.println("Enter a string");
        BufferedReader bufReader = new BufferedReader(new InputStreamReader(System.in));
        String text = bufReader.readLine();
        shuffle("",text);
    }
    public static void shuffle(String dummy, String input){
        if(input.length() <= 1)
            System.out.println(dummy+input);
        else{
            for(int i=0; i 

It should be input.substring(i,i+1) instead of input.substring(i,1). Because each time I need only 1 character to be constant, which is at the beginning of the string and others have to be jumbled.

The bug was I presumed the functionality of substring to be substring(beginIndex, length). But it is substring(beginIndex,endIndex).

@Oli: Thank you for the help.