How do I convert a UNIX Epoch Time string into a Java Date object?

Converting UNIX Epoch Time to Java Date Object

In Java, converting a UNIX Epoch time (represented as a string) into a Date object requires a two-step process.

Step 1: Parsing the Epoch Time

The UNIX Epoch time is typically expressed as a string representing the number of seconds since the epoch (January 1, 1970). To parse this string as a long integer, use the Long.parseLong() method, as seen in the following code:

String date = "1081157732";
long epochTime = Long.parseLong(date);

Step 2: Converting Seconds to Milliseconds

Java's Date constructor expects the epoch time to be specified in milliseconds. Therefore, we need to convert the parsed seconds into milliseconds. For this, we can multiply the epochTime by 1000:

long millisecondEpochTime = epochTime * 1000;

Creating the Date Object

Finally, we can create a Date object using the converted millisecondEpochTime:

Date expiry = new Date(millisecondEpochTime);

And that's how you convert a UNIX Epoch time string into a Java Date object. Enjoy coding!

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