PhoneticSearchSoundexAlgorithm.java

package com.howtodoinjava.examples;
 
public class Soundex 
{
  public static String getGode(String s) 
  {
    char[] x = s.toUpperCase().toCharArray();
     
     
    char firstLetter = x[0];
 
    //RULE [ 2 ]
    //Convert letters to numeric code
    for (int i = 0; i < x.length; i++) {
      switch (x[i]) {
      case 'B':
      case 'F':
      case 'P':
      case 'V': {
        x[i] = '1';
        break;
      }
 
      case 'C':
      case 'G':
      case 'J':
      case 'K':
      case 'Q':
      case 'S':
      case 'X':
      case 'Z': {
        x[i] = '2';
        break;
      }
 
      case 'D':
      case 'T': {
        x[i] = '3';
        break;
      }
 
      case 'L': {
        x[i] = '4';
        break;
      }
 
      case 'M':
      case 'N': {
        x[i] = '5';
        break;
      }
 
      case 'R': {
        x[i] = '6';
        break;
      }
 
      default: {
        x[i] = '0';
        break;
      }
      }
    }
 
    //Remove duplicates
    //RULE [ 1 ]
    String output = "" + firstLetter;
     
    //RULE [ 3 ]
    for (int i = 1; i < x.length; i++)
      if (x[i] != x[i - 1] && x[i] != '0')
        output += x[i];
 
    //RULE [ 4 ]
    //Pad with 0's or truncate
    output = output + "0000";
    return output.substring(0, 4);
  }
}
Let’s see how it to use above algorithm.

class Main {
  public static void main(String[] args) 
  {
    String name1 = "beer";
    String name2 = "bear";
    String name3 = "bearer";
     
    System.out.println(Soundex.getGode(name1));
    System.out.println(Soundex.getGode(name2));
    System.out.println(Soundex.getGode(name3));
  }
}