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Compute elapsed time in hours in Java
To get the elapsed time of an operation in hours in Java, we use the System.currentTimeMillis() method. The java.lang.System.currentTimeMillis() returns the current time in milliseconds.
Declaration −The java.lang.System.currentTimeMillis() is declared as follows −
public static long currentTimeMillis()
The method returns time difference in milliseconds between the current time and midnight, January 1, 1970 (UTC or epoch time).
Let us see a program to compute the elapsed time of an operation in hours in Java −
Example
public class Example { public static void main(String[] args) throws Exception { // finding the time before the operation is executed long start = System.currentTimeMillis(); for (int i = 0; i <5; i++) { Thread.sleep(60); } // finding the time after the operation is executed long end = System.currentTimeMillis(); // finding the time difference float msec = end - start; // converting it into seconds float sec= msec/1000F; // converting it into minutes float minutes=sec/60F; // converting it into hours float hours=minutes/60F; System.out.println(hours + " hours"); } }
Output
8.333334E-5 hours
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