how to convert unix stamp to date?

[bryan lim]

hi all,

i used the following code from https://coderanch.com/t/384000/Java-General-intermediate/java/Convert-Unix-TimeStamp-Date-Format

long timestamp = unixTime * 1000;  // msec  
java.util.Date d = new java.util.Date(timestamp);  
   
            System.out.println( "input = " + d.toString()  );  

my unix time stamp is 1244466958

But i keep getting Fri Dec 19 14:47:22 CET 1969 when i should be getting Monday, June 8th 2009, 13:15:58 (GMT)

can someone help me ?

[Rob Spoor]

Declare your unixTime as long instead of int.

Both 1244466958 and 1000 are ints. Therefore, although you assign the result to a long variable, the result of the multiplication is int as well. 1244466958000 is larger than Integer.MAX_VALUE so it will be wrapped to -1073557840.

If you declare unixTime as a long, the result of unixTime * 1000 will also be a long and therefore be 1244466958000.


Alternatively, you can upgrade the 1000 to a long by turning it into 1000L.

[bryan lim]

I see!. here's the code. Perfect! thanks Rob Prime!!!

		long timestamp =  Long.parseLong(value)  * 1000L;  // msec  
		java.util.Date d = new java.util.Date(timestamp);  
		   
		            System.out.println( "input = " + d.toString()  );