Commit c121444

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Added PermutationOfString code file

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	`1`	`+import java.util.HashSet;`
	`2`	`+`
	`3`	`+public class PermutationsOfString {`
	`4`	`+`
	`5`	`+ public static void main(String args[]) {`
	`6`	`+`
	`7`	`+ String input = "ABC";`
	`8`	`+ HashSet<String> resultSet = new HashSet<String>();`
	`9`	`+`
	`10`	`+ permutation(input, 0, resultSet);`
	`11`	`+`
	`12`	`+ for (String str : resultSet) {`
	`13`	`+ System.out.println(str);`
	`14`	`+ }`
	`15`	`+`
	`16`	`+ }`
	`17`	`+`
	`18`	`+ public static void permutation(String input, int fixedIndex, HashSet<String> resultSet) {`
	`19`	`+`
	`20`	`+`
	`21`	`+ if (fixedIndex == input.length()-1) {`
	`22`	`+ resultSet.add(input);`
	`23`	`+ return;`
	`24`	`+ }`
	`25`	`+`
	`26`	`+ for (int i = fixedIndex; i < input.length(); i++) {`
	`27`	`+`
	`28`	`+ input = swap(input, fixedIndex, i);`
	`29`	`+ resultSet.add(input);`
	`30`	`+ permutation(input, fixedIndex+1, resultSet);`
	`31`	`+ input = swap(input, fixedIndex, i);`
	`32`	`+`
	`33`	`+ }`
	`34`	`+`
	`35`	`+ }`
	`36`	`+`
	`37`	`+ public static String swap(String s, int i, int j) {`
	`38`	`+`
	`39`	`+ char[] input = s.toCharArray();`
	`40`	`+`
	`41`	`+ char temp = input[i];`
	`42`	`+ input[i] = input[j];`
	`43`	`+ input[j] = temp;`
	`44`	`+`
	`45`	`+ return String.valueOf(input);`
	`46`	`+ }`
	`47`	`+`
	`48`	`+}`

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