/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.time.* ;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
        String input = "/Date(253402214400000)/";
        String inputDigits = input.replace( "/" , "" ).replace( "Date(" , "" ).replace( ")" , "" ).replace( "/" , "" );
        long countFromEpoch1970Utc = Long.parseLong( inputDigits );
        System.out.println( "countFromEpoch1970Utc = " + countFromEpoch1970Utc );
 
        Instant instant = Instant.ofEpochMilli( countFromEpoch1970Utc );
        System.out.println( "instant = " + instant );
	}
}

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