用于对DropDownlist进行排序的java字符串数字比较器

Question

String Numeric Comparator to Sort DropDownlist:

List have Ex: 1 per 1 months , 1 per 2 months ...... 2 per 12 months

I tried StringComparator , String Numeric Comparator , NumericComparator , Split Comparator but didn't worked,Any Suggestions

Answer 1

Your custom implementation of Comparator will help you:

Comparator<String> comp = new Comparator<String>() {
  public int compare(String o1, String o2) {
    // TODO
  }
};

Answer 2

You have to write your own comparator. First you have to calculate x / y where the text is x per y months . Then you only have to compare x1/y1 with x2/y2.

Comparator<String> comp = new Comparator<String>() {
    public int compare(String o1, String o2) {
        Double d1 = calcValue(o1);
        Double d2 = calcValue(o2);
        return d1.compareTo(d2);
    }

    private Double calcValue(String s) {
         Double x, y;
         // extract x and y from String s
         ...
         return x / y;
    }
};