Question
Find all the permutation of a word.
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Code
import java.util.Scanner;
public class permuteWord
{
/*Function for swapping the characters at position I with character at position j */
public static String swapcharacter(String a, int i, int j)
{
char[] b =a.toCharArray();
char ch;
ch = b[i];
b[i] = b[j];
b[j] = ch;
return String.valueOf(b);
}
public static void main(String[] args)
{
String wd="";
Scanner sc = new Scanner(System.in);
System.out.println("Enter a word");
wd =sc.next();
int len = wd.length();
System.out.println("All the permutations of the string are: ");
makePermutation(wd, 0, len);
}
/*Function for making different permutations of the string */
public static void makePermutation(String str, int s, int e)
{
/*print string*/
if (s == e-1)
System.out.println(str);
else
{
for (int i = s; i < e; i++)
{
/*Swapping the string by fixing a character */
str = swapcharacter(str,s,i);
/*Recursively calling function makePermutation() for rest of the characters*/
makePermutation(str,s+1,e);
/*Backtracking and swapping the characters again. */
str = swapcharacter(str,s,i);
}
}
}
}
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