Here is our character array.char[] ch = { 'T', 'E', 'S', 'T', 'I', 'N', 'G'};Create string object from some part of a string using the following String constructor. Through this we are fetching substring “IN” from the character array.String str = new String(ch, 4, 2);Example Live Demopublic class Demo {    public static void main(String[] args) {       char[] ch = { 'T', 'E', 'S', 'T', 'I', 'N', 'G'};       String str = new String(ch, 4, 2);       System.out.println(str);    } }OutputIN

Here is our character array.char[] ch = { 'T', 'E', 'S', 'T'};To create string object from the above character array is quite easy. Add the array to the string parameter as shown below −String str = new String(ch);Example Live Demopublic class Demo {    public static void main(String[] args) {       char[] ch = { 'T', 'E', 'S', 'T'};       String str = new String(ch);       System.out.println(str);    } }OutputTEST

Argument indices allow programmers to reorder the output. Let us see an example.Example Live Demopublic class Demo {    public static void main(String[] args) {       System.out.printf("Before reordering = %s %s %s %s %s %s", "one", "two", "three", "four", "five", "six" );       System.out.printf("After reordering = %6$s %5$s %4$s %3$s %2$s %1$s", "one", "two", "three", "four", "five", "six" );       System.out.printf("Before reordering = %d %d %d", 100, 200, 300);       System.out.printf("After reordering = %2$d %3$d %1$d", 100, 200, 300);    } }OutputBefore reordering = one two three four five six After reordering = ... Read More

To display localized method name in Java, use the ‘B’ conversion character.System.out.printf("Localized month : %TB", d);To display method name in lowercase, use the “%tb”System.out.printf("Localized month : %tB", d);Example Live Demoimport java.util.Date; public class Demo {    public static void main(String[] args) {       Date d = new Date();       System.out.printf("Morning/afternoon indicator: %tp", d);       System.out.printf("Morning/afternoon indicator: %Tp", d);       System.out.printf("Localized month : %tB", d);       System.out.printf("Localized month : %TB", d);    } }OutputMorning/afternoon indicator: pm Morning/afternoon indicator: PM Localized month : November Localized month : NOVEMBERRight justify and left justify values ... Read More

Locale-specific morning/afternoon indicator is the AM/PM marker indicator.Use the ‘p’ conversion character to display AM/PM.System.out.printf("Morning/afternoon indicator: %tp",d);Example Live Demoimport java.util.Date; public class Demo {    public static void main(String[] args) {       Date d = new Date();       System.out.printf("Morning/afternoon indicator: %tp",d);       System.out.printf("Morning/afternoon indicator: %Tp",d);    } }OutputMorning/afternoon indicator: pm Morning/afternoon indicator: PM

To display milliseconds since the epoch, use the ‘Q’ Date and Time conversion specifier.System.out.printf("Milliseconds since epoch = %TQ", d);The above would display milliseconds since.1970-01-01 00:00:00 GMTExample Live Demoimport java.util.Date; public class Demo {    public static void main(String[] args) {       Date d = new Date();       System.out.printf("Nanoseconds = %tN", d);       System.out.printf("Seconds since epoch = %ts", d);       System.out.printf("Milliseconds since epoch = %TQ", d);    } }OutputNanoseconds = 050000000 Seconds since epoch = 1543241478 Milliseconds since epoch = 1543241478050

To display seconds since the epoch, use the ‘s’ Date and Time conversion specifier.System.out.printf("Seconds since epoch = %ts", d);The above would display seconds since.1970-01-01 00:00:00 GMTExample Live Demoimport java.util.Date; public class Demo {    public static void main(String[] args) {       Date d = new Date();       System.out.printf("Nanoseconds = %tN", d);       System.out.printf("Seconds since epoch = %ts", d);    } }OutputNanoseconds = 364000000 Seconds since epoch = 1543241402

To display nanoseconds, use the ‘N’ Date and Time conversion specifier.System.out.printf("Nanoseconds = %tN", d);Example Live Demoimport java.util.Date; public class Demo {    public static void main(String[] args) {       Date d = new Date();       System.out.printf("Nanoseconds = %tN", d);    } }OutputNanoseconds = 092000000

To display number with thousands separator, set a comma flag.System.out.printf( "%,d",78567);The above would result.78, 567Let’s check for bigger numbers.System.out.printf( "%,d", 463758);The above would result.463,758Example Live Demopublic class Demo {    public static void main( String args[] ) {       System.out.printf( "%,d", 95647 );       System.out.printf( "%,d", 687467 );       System.out.printf( "%,.2f", 7546.21 );       System.out.printf( "%,.2f", 463758.787 );       System.out.printf( "%,.2f", 123456.5 );    } }Output95,647 687,467 7,546.21 463,758.79 123,456.50

The following are the conversion characters for date-time −CharacterDescriptioncComplete date and timeFISO 8601 dateDU.S. formatted date (month/day/year)T24-hour timer12-hour timeR24-hour time, no secondsYFour-digit year (with leading zeroes)yLast two digits of the year (with leading zeroes)CFirst two digits of the year (with leading zeroes)BFull month namebAbbreviated month namemTwo-digit month (with leading zeroes)dTwo-digit day (with leading zeroes)eTwo-digit day (without leading zeroes)AFull weekday nameaAbbreviated weekday namejThree-digit day of year (with leading zeroes)HTwo-digit hour (with leading zeroes), between 00 and 23kTwo-digit hour (without leading zeroes), between 0 and 23ITwo-digit hour (with leading zeroes), between 01 and 12lTwo-digit hour (without leading zeroes), between 1 and 12MTwo-digit ... Read More