Instanceof Enhancement

Before Java 16, To type cast from super class to sub class type, We first need to check with  'instanceof ' operator to know underlying object type to avoid exception.

Object stringObj = "Fullstack Adda";

if (stringObj instanceof String) {

String string = (String) stringObj;

System.out.println(string);

}

Output:

Fullstack Adda

The above code can be written as follows.

Object stringObj = "Fullstack Adda";

if (stringObj instanceof String string) {

System.out.println(string);

}

Output:

Fullstack Adda

This enhancement helps to reduce the code statements.

 Happy Coding 😃 

Day period support to time

To format 24 hours form time into 12 hours format, We can use letter "a" in the formatter. For time period from "00:00" hours to "11:59", it prints "AM".    

LocalTime date1 = LocalTime.parse("00:00");

LocalTime date2 = LocalTime.parse("11:59");

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("hh:mm a");

String date1Str = formatter.format(date1);

String date2Str = formatter.format(date2);

System.out.println(date1Str);

System.out.println(date2Str);

Output :

12:00 AM

11:59 AM

In Java 16 , a new literal "B" (or BBBB or BBBBB) is added. It describes the time in human readable way.  It prints as follows.

00:00 - midnight

00:01 to 05:59 - at night

06:00 to 11:59 - in the morning

12:00 to 17:59 - in the afternoon

18:00 to  20:59 - in the evening

21:00 to 23:59 - at night

 LocalTime date1 = LocalTime.parse("00:00");

 LocalTime date2 = LocalTime.parse("05:10");

 LocalTime date3 = LocalTime.parse("08:10");

 LocalTime date4 = LocalTime.parse("13:59");

 LocalTime date5 = LocalTime.parse("18:10");

 LocalTime date6 = LocalTime.parse("22:59");

 DateTimeFormatter formatter =                                                       DateTimeFormatter.ofPattern("hh:mm B");

 String date1Str = formatter.format(date1);

 String date2Str = formatter.format(date2);

 String date3Str = formatter.format(date3);

 String date4Str = formatter.format(date4);

 String date5Str = formatter.format(date5);

 String date6Str = formatter.format(date6);

 System.out.println(date1Str);

 System.out.println(date2Str);

 System.out.println(date3Str);

 System.out.println(date4Str);

 System.out.println(date5Str);

 System.out.println(date6Str);

Output:

12:00 midnight

05:10 at night

08:10 in the morning

01:59 in the afternoon

06:10 in the evening

10:59 at night

Please let me know your opinion in the comments below. 

Happy Coding 😀