Method toUniversalString
Method toUniversalString (lines 28–31) takes no arguments and returns a String in universal-time format, consisting of two digits each for the hour, minute and second. For example, if the time were 1:30:07 PM, the method would return 13:30:07. Line 30 uses static method format of class String to return a String containing the formatted hour, minute and second values, each with two digits and possibly a leading 0 (specified with the 0 flag). Method format is similar to method System.out.printf except that format returns a formatted String rather than displaying it in a command window. The formatted String is returned by method toUniversalString.
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