Timing « Development Class « Java

1.Compute and display elapsed time of an operation
2.Get system time using System class
3.Class for program event timing
4.Get elapsed time in milliseconds
5.Get elapsed time in seconds
6.Get elapsed time in minutes
7.Get elapsed time in hours
8.Get elapsed time in days
9.Get time in milliseconds using Java Calendar

10.java.util.concurrent.TimeUnit: convert between milliseconds and days
11.Get seconds since