如何在Java中以人类可读的格式显示时间？

Question

I am making one logic, in one method I am getting time in milliseconds. I want to show it something like below:

if time is b/w 1 minutes - 60 minutes, lets say 25 minutes it will show - 25 minute
if time is 1 hour and 59 minutes it will show - 1h+
later if its 2 hour than it will show - 2h+
this will continue to 24 hour.
later if its one day and few hours than it will show - 1d+
this will be continue till week and later on week, months and year like 
    1h+..... 1d,
    1d+..... 1w,
    1w+..... 1m,
    1m+..... 1y, 1y+..

I cant use more if else. I need good performance with this method.

Answer 1

You can write few if's and create table for millisecond range, like using concurrenthashmap which has key and values. if your millisecond range fall in 0 to 60000 - milliseconds, create a seconds key and value in the hash map similarly with 60000 to 3600000, create a key of minute and value in it likewise you can proper ranges and it's values.

Answer 2

you can go with java.util.concurrent.TimeUnit class and it's method toSeconds(long duration),toMinutes(long duration),toHiurs(long duration)....to convert milliseconds to seconds,minutes,hours,days and so on.

Example: `TimeUnit.MILLISECONDS.toMinutes(millis);