Java Class to convert a number to a short-format indian currency representation

InrSimplifier.java

import java.util.*;
import java.util.Map.*;
import java.text.DecimalFormat;

/**
 * Makes a longer number shorter like cr., lac, etc.
 * Output: 500, 4k, 30k, 99k, 2lac, 9.9lac, 40lac, 99lac, 1.9Cr., 20Cr., 100Cr., 214Cr
 * Limitation: Works from zero to the longest int or as Indians call, the Mallya limit.
 */

public class InrSimplifier {

    private static final NavigableMap<Long, String> suffixes = new TreeMap<> ();
    static {
      suffixes.put(1_000L, "k");
      suffixes.put(1_00_000L, "lac");
      suffixes.put(1_00_00_000L, "Cr.");
    }

    public static void main(String[] args) {
        System.out.println(InrSimplifier.format(500));
        System.out.println(InrSimplifier.format(4000));
        System.out.println(InrSimplifier.format(30000));
        System.out.println(InrSimplifier.format(99999));
        System.out.println(InrSimplifier.format(200000));
        System.out.println(InrSimplifier.format(999999));
        System.out.println(InrSimplifier.format(4000000));
        System.out.println(InrSimplifier.format(9999999));
        System.out.println(InrSimplifier.format(19999999));
        System.out.println(InrSimplifier.format(209999999));
        System.out.println(InrSimplifier.format(1009999999));
        System.out.println(InrSimplifier.format(2147483647)); // <-- Largest Int
    }

    public static String format(long value) {
      //Long.MIN_VALUE == -Long.MIN_VALUE so we need an adjustment here
      if (value == Long.MIN_VALUE) return format(Long.MIN_VALUE + 1);
      if (value < 0) return "-" + format(-value);
      if (value < 1000) return Long.toString(value); //deal with easy case

      Entry<Long, String> e = suffixes.floorEntry(value);
      Long divideBy = e.getKey();
      String suffix = e.getValue();

      long truncated = value / (divideBy / 10); //the number part of the output times 10
      boolean hasDecimal = truncated < 100 && (truncated / 10d) != (truncated / 10);
      return hasDecimal ? (truncated / 10d) + suffix : (truncated / 10) + suffix;
    }
}