java execution time in seconds code example

Example 1: java execution time

long start = System.currentTimeMillis();
class.method();
long time = System.currentTimeMillis() - start;

Example 2: java get excectuon time

long startTime = System.nanoTime();
methodToTime();
long endTime = System.nanoTime();

long duration = (endTime - startTime);  //divide by 1000000 to get milliseconds.

Example 3: java measure execution time

Instant start = Instant.now();
Thread.sleep(63553);
Instant end = Instant.now();
System.out.println(Duration.between(start, end)); // prints PT1M3.553S