String.Format in Java

 Packagejunit.test;Importjava.util.Date;ImportJava.util.Locale;Importorg.junit.Test; Public classStringFormat {/*String.Format () Usage 1, conversion%s: String type, such as: "LJQ"%b: Boolean type, such as: true%d: integer type (decimal), such as: 99%f: Floating-point type, for example: 99.99%: Percent type, such as:%%n: newline character */@Test Public voidtest1 () {String str=NULL; STR=string.format ("Hi,%s", "Lin Yi-chin");//Formatting StringsSystem.out.println (str);//output string variable str contentSystem.out.printf ("3>7 The result is:%b%n", 3>7); System.out.printf ("Half of 100 is:%d%n", 100/2); System.out.printf ("50 Yuan Book 8.5 discount is:%f Yuan%n", 50*0.85); System.out.printf ("The above discount is%d%%%n", 85);}/*2, common date time format c: Include all date and time information week Liuxing 14:21:20 CST 2007F: "Year-month-day" format, such as: 2007-10-27d: "Month/day/year" format, such as: 10/27/07r: "HH:MM:SS PM" Format (12 o'clock), such as: 02:25:51 PM T: "HH:MM:SS" format (24 o'clock), such as: 14:28:16r: "hh:mm" Format (24 o'clock System), such as: 14:28*/@Test Public voidtest2 () {Date Date=NewDate ();//Create Date ObjectSystem.out.printf ("All date and time information:%tc%n", date);//format output date or timeSYSTEM.OUT.PRINTF ("year-month-day format:%tf%n", date); System.out.printf ("Month/day/year format:%td%n", date); System.out.printf ("HH:MM:SS PM Format (12 o'clock):%tr%n", date); System.out.printf ("HH:MM:SS Format (24 o'clock System):%tt%n", date); System.out.printf ("hh:mm Format (24 o'clock System):%tr%n", date);}/*3, formatted date string B or H: The month abbreviation, as in: October English: Oct B: Full month, as in: October English: October A: The abbreviation of the week, such as: Saturday English: Sat A: Full name of the week, such as: Middle: Saturday English: Saturday C: The first two digits of the year (not 0 on the front of the two digits), such as: 20y: The last two digits of the year (less than two bits before 0), such as: 07y:4 digit year (less than 4 digits before 0), such as: 2007j: The number of days in a year (the day of the year), such as: two-digit month (less than two digits before 0), such as: 10d : Two digits of the day (less than two bits in front of 0), such as: 27e: The Day of the month (the front does not fill 0), such as: 5*/@Test Public voidtest3 () {Date Date=NewDate ();//Create Date ObjectString Str=string.format (locale.us, "English month Abbreviation:%TB", date);//Formatting Date StringsSystem.out.println (str);//Output String ContentsSystem.out.printf ("Local month Abbreviation:%tb%n"), date); STR=string.format (locale.us, "English month Full name:%TB", date);    System.out.println (str); System.out.printf ("Local Month full name:%tb%n", date); STR=string.format (locale.us, "English week abbreviation:%ta", date);    System.out.println (str); System.out.printf ("Local week abbreviation:%ta%n", date); System.out.printf ("The first two digits of the year (less than two bits before 0):%tc%n", date); System.out.printf ("Number of years after two digits (less than two bits before 0):%ty%n", date); System.out.printf ("Number of days in the year (the Day of the year):%tj%n", date); System.out.printf ("Two-digit month (less than two bits preceded by 0):%tm%n", date); System.out.printf ("Two-digit day (less than two bits in front of 0):%td%n", date); System.out.printf ("Day of the month (not before 0):%te", date);}/*4. Format time string H: 2-digit 24 o'clock hours (less than 2 bits in front of 0), such as: 15i:2-digit 12 o'clock hours (less than 2 bits in front of 0), such as: 03k:2-digit 24 o'clock hour (front does not fill 0), such as: 15l:2-digit 12 O'Clock hour ( Before 0), such as: 3m:2 digits of the minute (less than 2 bits in front of 0), such as: 03s:2 digit seconds (less than 2 bits in front of 0), such as: 09l:3 digit milliseconds (less than 3 bits in front of 0), such as: 015n:9 digits of the number of milliseconds (less than 9 bits before 0), such as: 562000000 P: Small Letter of the morning or afternoon mark, such as: Medium: p.m.: PM Z: Offset from GMT's RFC822 time zone, such as: +0800z: Time zone abbreviation string, such as: Csts:1970-1-1 00:00:00 to now the number of seconds elapsed, such as: 1193468128q:1970-1-1 00:00:00 to the current number of milliseconds elapsed, such as: 1193468128984*/@Test Public voidtest4 () {Date Date=NewDate ();//Create Date ObjectSystem.out.printf ("2-digit 24 o'clock hour (less than 2 bits in front 0):%th%n", date); System.out.printf ("2-digit 12 o'clock hour (less than 2 bits in front 0):%ti%n", date); System.out.printf ("2-digit 24 o'clock hour (not before 0):%tk%n", date); System.out.printf ("2-digit 12 o'clock hour (not before 0):%tl%n", date); System.out.printf ("2-digit minute (less than 2 bits preceded by 0):%tm%n", date); System.out.printf ("2 digits in seconds (less than 2 bits before 0):%ts%n", date); System.out.printf ("3-digit millisecond (less than 3 bits preceded by 0):%tl%n", date); System.out.printf ("Number of milliseconds for 9 digits (less than 9 bits before 0):%tn%n", date); String Str=string.format (locale.us, "small letter morning or afternoon mark (English):%TP", date);                          System.out.println (str); //output string variable str contentSystem.out.printf ("Small Letter morning or afternoon mark (middle):%tp%n"), date); System.out.printf ("Offset from RFC822 time zone relative to GMT:%tz%n", date); System.out.printf ("Time zone abbreviation string:%tz%n", date); System.out.printf ("1970-1-1 00:00:00 to the present number of seconds elapsed:%ts%n", date); System.out.printf ("1970-1-1 00:00:00 to the present number of milliseconds:%tq%n", date);}}

String.Format in Java