Question

Complate this in java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;

public class WordDetective {

/**
* Reorders the letters in word.
*
* Algorithm:
* Copy the word into an array of characters.
* Repeat 4 times:
* Randomly select 2 indexes in the word array using
* nextInt( word length) of the randGen parameter.
* Swap the letters at the selected indexes in the word array.
* Create a string from the array of characters.
*
* @param word The letters to be reordered.
* @param randGen A random number generator.
* @return The letters that have been randomly ordered.
*/
public static String reorderLetters(String word, Random randGen) {
return null; //TODO
}   
  

Answer 1

Given below is the code for the question. Please do rate the answer if it helped. Thank you.

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;

public class WordDetective {

   /**
   * Reorders the letters in word.
   *
   * Algorithm:
   * Copy the word into an array of characters.
   * Repeat 4 times:
   * Randomly select 2 indexes in the word array using
   * nextInt( word length) of the randGen parameter.
   * Swap the letters at the selected indexes in the word array.
   * Create a string from the array of characters.
   *
   * @param word The letters to be reordered.
   * @param randGen A random number generator.
   * @return The letters that have been randomly ordered.
   */
   public static String reorderLetters(String word, Random randGen) {
       char[] arr = word.toCharArray();
       int idx1, idx2;
       char temp;
      
       for(int i = 1; i <= 4; i++){
           idx1 = randGen.nextInt(word.length());
           idx2 = randGen.nextInt(word.length());
           temp = arr[idx1];
           arr[idx1] = arr[idx2];
           arr[idx2] = temp;
       }
       return new String(arr);
   }
}