Java program to expand a String if range is given?

To expand a String if range is given, the Java code is as follows −

Example

 Live Demo

public class Demo {
   public static void expand_range(String word) {
      StringBuilder my_sb = new StringBuilder();
      String[] str_arr = word.split(", ");
      for (int i = 0; i < str_arr.length; i++){
         String[] split_str = str_arr[i].split("-");
         if (split_str.length == 2){
            int low = Integer.parseInt(split_str[0]);
            int high = Integer.parseInt(split_str[split_str.length - 1]);
            while (low <= high){
               my_sb.append(low + " ");
               low++;
            }
         } else {
            my_sb.append(str_arr[i] + " ");
         }
      }
      System.out.println(my_sb.toString());
   }
   public static void main(String args[]){
      String my_str = "1-4, 56-57, 99-101, 0-1";
      System.out.println("The expanded range of given numbers is ");
      expand_range(my_str);
   }
}

Output

The expanded range of given numbers is
1 2 3 4 56 57 99 100 101 0 1

A class named Demo contains a function named ‘expand_range’, that splits the string basedon commas, and iterates through the string and splits the numbers and increments 1 every time. This is displayed on the console. In the main function, the string is defined, and the function is called by passing this function as a parameter. Relevant message is displayed on the console.