Get the current timestamp in milliseconds by using the System.currentTimeMillis() method.
Use Calendar.getInstance().getTimeInMillis() method to obtain the current timestamp in milliseconds.
Get the current timestamp in milliseconds using the new Date().getTime() method.
Use the System.nanoTime() method to get the current timestamp in nanoseconds. It’s important to note that nanosecond-level timestamps have higher precision but are also more susceptible to the influence of the system clock.
Obtain the current timestamp in milliseconds using the Instant.now().toEpochMilli() method, a new feature introduced in Java 8 for precise millisecond-level timestamp retrieval.
