string_distance.java

public class TestVec1 {
  private static int[] strToVec(String str, int len) {
    int[] vec = new int[len];
    for (int i = 0;i < len;i++) {
      if (i < str.length()) {
        vec[i] = str.charAt(i);
      } else {
        vec[i] = 0;
      }
    }
    return vec;
  }

  private static void printVec(int[] vec) {
    System.out.print("[");
    if (vec.length > 0) {
      System.out.print(vec[0]);
      for (int i = 1;i < vec.length;i++) {
        System.out.print(", " + vec[i]);
      }
    }
    System.out.println("]");
  }

  private static float calcDistance(int[] vec1, int[] vec2) {
    float sum = 0;
    for (int i = 0;i < vec1.length;i++) {
      sum += Math.pow(vec1[i] - vec2[i], 2);
    }
    return sum / vec1.length;
  }

  public static void main(String[] args) {
    String str1 = "abc";
    String str2 = "adc";
    String str3 = "track";
    int[] vec1 = strToVec(str1, 5);
    int[] vec2 = strToVec(str2, 5);
    int[] vec3 = strToVec(str3, 5);
    printVec(vec1);
    printVec(vec2);
    printVec(vec3);
    System.out.println(calcDistance(vec1, vec2));
    System.out.println(calcDistance(vec1, vec3));
  }
}