dcsimg

What's the fastest way to normalize a Time object?

Created May 7, 2012

Joe Sam Shirah

Of the two recommended ways when using a Calendar( see How do I create a java.sql.Time object? ), in my tests, this code ( where c is a Calendar and t is a Time ): 


     c.set( Calendar.YEAR,  1970 );
     c.set( Calendar.MONTH, Calendar.JANUARY );
     c.set( Calendar.DATE,  1 );
     c.set( Calendar.MILLISECOND, 0 );

     t = new java.sql.Time( c.getTime().getTime() );
was always at least twice as fast as: 

      t = java.sql.Time.valueOf( 
             c.get(Calendar.HOUR_OF_DAY) + ":" + 
             c.get(Calendar.MINUTE) + ":" +
             c.get(Calendar.SECOND)  );
When the argument sent to valueOf() was hardcoded ( i.e. valueOf( "13:50:10" ), the time difference over 1000 iterations was negligible.