Question

How to calculation code execution time in seconds using Java

Answer 1

import java.util.concurrent.TimeUnit;

public class MyClass {
    public static void main(String args[]) {
        long start = System.nanoTime();
        
        for (int i = 0; i < 2000000; i++);
            
        long time = System.nanoTime() - start;
        double timeInSeconds = time/1e9;
        
        System.out.println(timeInSeconds);
        
    }
}

/*
run:
   
0.003324676
  
*/

 

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