How to calculate the running time of my program?

Question

I wrote a program and now I want to calculate the total running time of my program from start to end. How to calculate the running time of my program?

Answer 1

To calculate program running time by using System.currentTimeMillis() or System.nanoTime().

See the running code for calculating program running time:-

long start = System.currentTimeMillis();
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Your program code
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long end = System.currentTimeMillis();
NumberFormat formatter = new DecimalFormat("#0.00000");
System.out.print("Execution time: " + formatter.format((end - start) / 1000d) + " (seconds)");

Now, you can get time in seconds.