Nanoseconds to milliseconds java. currentTimeMillis() will give you the most accurate possible elapsed time in milliseconds since the epoch, but System. Return Value: This method returns the converted duration as NanoSeconds. , not all systems have a clock that counts individual nanoseconds, and so the clock might only tick on 100 or 1000 nanoseconds and you will only ever get multiples of that. toNanos. It provides a set of predefined constants, each corresponding to a specific unit of time, including: DAYS HOURS MINUTES SECONDS MILLISECONDS MICROSECONDS NANOSECONDS Learn how to accurately convert nanoseconds to milliseconds with decimal precision in programming. *; import java. io. The string must match exactly an identifier used to declare an enum constant in this type. Using TimeUnit, how can I convert 665477 nanosecond to 0. Date; class GFG { How to convert a value from nanoseconds to seconds? Here's the code segment: import java. public static TimeUnit[] values() Returns an array containing the constants of this enum type, in the order they are declared. Understanding TimeUnit TimeUnit is an enum, included in the java. Parameters: duration - the duration. Returns: the converted duration, or Long. Convert milliseconds to date-time. Nanoseconds are a much smaller unit of time compared to milliseconds, where 1 millisecond is equal to 1,000,000 nanoseconds. class Stamper { public static void main (String [] args) { System. One millisecond is equal to one million nanoseconds (1 ms = 1,000,000 ns). nanoTime() gives you a nanosecond-precise time, relative to some arbitrary point. This method may be used to iterate over the constants as follows valueOf. util. Conversions from finer to coarser granularities truncate, so lose precision. MIN_VALUE if conversion would negatively overflow, or Long. concurrent. This is for comparability with the sleep / wait methods and some other external library that gives out large nanosecond values. convert(duration, this). Learn to create DateTimeFormatter in Java 8 for handling milliseconds, microseconds, and nanoseconds with clear examples. public static TimeUnit valueOf(String name) Returns the enum constant of this type with the specified name. Jun 28, 2024 · To convert nanoseconds to milliseconds and handle cases where the nanoseconds value is less than 999999 in Java, you can simply take the division remainder by 1,000,000 (divmod) to obtain the milliseconds component. Link to a moment. convert. Supports Unix timestamps in seconds, milliseconds, microseconds and nanoseconds. public long convert(long sourceDuration, TimeUnit sourceUnit) Converts the given time duration in the given unit to this unit. This method provides nanosecond precision, but not necessarily nanosecond accuracy. Oct 16, 2025 · In this blog post, we will explore how to perform this conversion in Java, including core concepts, typical usage scenarios, common pitfalls, and best practices. Below program illustrate the implementation of TimeUnit toNanos () method: Program 1: import java. public long toNanos(long duration) Equivalent to NANOSECONDS. Learn how to accurately convert nanoseconds to milliseconds in Java, handling values less than 999999 with practical examples. The accuracy can vary, i. The goal is to combine the nanoseconds and milliseconds values to ensure the maximum resolution possible with the limit given. Find clear examples and tips here. Sep 20, 2025 · The goal is to combine the nanoseconds and milliseconds values to ensure the maximum resolution possible with the limit given. Time can be represented in various units such as nanoseconds (nano) and milliseconds (milli). 665477 millisecond? long t = TimeUnit. 2. *; . e. convert(665477L, TimeUnit. MILLISECONDS. Parameters: This method accepts a mandatory parameter duration which is the duration in milliSeconds. No guarantees are made about how frequently values change. MAX_VALUE if it would positively overflow. NANOSECONDS); This always gives 0 but I need decimal points In Java, converting nanoseconds to milliseconds can be easily achieved by understanding the relationship between the two units of time. My code looks like the following now: Nov 26, 2025 · This blog will guide you through the process of accurately converting nanoseconds to milliseconds and remaining nanoseconds in Java, covering unit fundamentals, potential pitfalls, step-by-step implementation, and best practices. . Less accurate. According to Java documentation, The value returned represents nanoseconds since some fixed but arbitrary time (perhaps in the future, so values may be negative). concurrent package, that represents various units of time, ranging from nanoseconds to days. values. Actually, the precision of the value returned by nanoTime is always the same -- billionths of seconds. In Java programming, dealing with time measurements is a common task. rl7pd, oa4uy, f8567u, tugf, mkjy, 9sl1ez, gedi, uaxk, sfn7mp, 2zqi,