Test.java

import java.lang.invoke.SwitchPoint;

public class Test {
  public static void main(String[] args) {
    String str = "three four eight nine four";

String ans = "";
    String strArray[] = str.split(" ");

    System.out.println("String : " + str);
    for (int i = 0; i < strArray.length; i++) {
      switch (strArray[i])
      {
        case "one":
         ans = ans+"1";
         break;
        case "two":
          ans = ans+"2";
          break;
        case "three":
          ans = ans+"3";
          break;
        case "four":
          ans = ans+"4";
          break;
        case "five":
          ans = ans+"5";
          break;
        case "six":
          ans = ans+"6";
          break;
        case "seven":
          ans = ans+"7";
          break;
        case "eight":
          ans = ans+"8";
          break;
        case "nine":
          ans = ans+"9";
          break;
        case "zero":
          ans = ans+"0";
          break;
      }

    }
    System.out.println(ans);
    }

}