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Articles by Samual Sam
Page 82 of 151
Display ISO 8601 standard date in Java
Use the ‘F’ date conversion character to display ISO 8601 standard date.System.out.printf("ISO 8601 standard date = %tF", d);Above, d is a date object.Date d = new Date();Exampleimport java.util.Date; import java.text.DateFormat; import java.text.SimpleDateFormat; public class Demo { public static void main(String[] args) throws Exception { Date d = new Date(); System.out.printf("Four-digit Year = %TY",d); System.out.printf("Two-digit Year = %ty",d); System.out.printf("ISO 8601 standard date = %tF", d); } }OutputFour-digit Year = 2018 Two-digit Year = 18 ISO 8601 standard date = 2018-11-26
Read MoreIntegral conversion characters in Java
Intergral conversion characters include the following.CharacterDescription%dInteger%oOctal%xHexadecimal%XHexadecimalExamplepublic class Demo { public static void main(String[] args) throws Exception { System.out.printf( "Integer: %d", 889 ); System.out.printf( "Negative Integer: %d", -78 ); System.out.printf( "Octal: %o", 677 ); System.out.printf( "Hexadecimal: %x", 56 ); System.out.printf( "Hexadecimal: %X", 99 ); } }OutputInteger: 889 Negative Integer: -78 Octal: 1245 Hexadecimal: 38 Hexadecimal: 63
Read MoreConversion characters for date in Java
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 MoreJava Program to convert a Primitive Type Value to a String
For converting a primitive type value to a string in Java, use the valueOf() method.Let’s say we want to convert the following double primitive to string.double val4 = 8.34D;For that, use the valueOf() method. It converts it into a string.String str4 = String.valueOf(val4);Examplepublic class Demo { public static void main(String[] args) { int val1 = 5; char val2 = 'z'; float val3 = 9.56F; double val4 = 8.34D; System.out.println("Integer: "+val1); System.out.println("Character: "+val2); System.out.println("Float: "+val3); System.out.println("Double: ...
Read MoreDisplay nanoseconds with Java Date and Time Conversion Character
To display nanoseconds, use the ‘N’ Date and Time conversion specifier.System.out.printf("Nanoseconds = %tN", d);Exampleimport java.util.Date; public class Demo { public static void main(String[] args) { Date d = new Date(); System.out.printf("Nanoseconds = %tN", d); } }OutputNanoseconds = 092000000
Read MoreChecks if two calendar objects represent the same local time in Java
Use the == operator to compare two calendar objects.Let us first create the first calendar object and set date −Calendar date1 = Calendar.getInstance(); date1.set(Calendar.YEAR, 2040); date1.set(Calendar.MONTH, 10); date1.set(Calendar.DATE, 25); date1.set(Calendar.HOUR_OF_DAY, 11); date1.set(Calendar.MINUTE, 30); date1.set(Calendar.SECOND, 10);Now, the following is the second calendar object −Calendar date2 = Calendar.getInstance(); date2.set(Calendar.YEAR, 2040); date2.set(Calendar.MONTH, 10); date2.set(Calendar.DATE, 25); date2.set(Calendar.HOUR_OF_DAY, 11); date2.set(Calendar.MINUTE, 30); date2.set(Calendar.SECOND, 10);Let is now compare them using == and && operators −if(date1.get(Calendar.SECOND) == date2.get(Calendar.SECOND) && date1.get(Calendar.MINUTE) == date2.get(Calendar.MINUTE) && date1.get(Calendar.HOUR) == date2.get(Calendar.HOUR) && date1.get(Calendar.DAY_OF_YEAR) == date2.get(Calendar.DAY_OF_YEAR) && date1.get(Calendar.YEAR) == date2.get(Calendar.YEAR) ) { System.out.println("The local time for the calendar objects is same..."); } ...
Read MoreDisplay localized month name with printf method in Java
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);Exampleimport 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 in ...
Read MoreDifferent Methods to find Prime Number in Java
A prime number is a number that is only divisible by one or itself. Some of the prime numbers are 2, 3, 5, 7, 11, 13 etc.Some of the different methods to find a prime number in Java are given as follows −Method 1 - Find if a number is prime without using a functionA program that finds if the given number is prime without using a function is given as follow −Examplepublic class Example { public static void main(String args[]) { int num = 11, flag=0; if(num == 0||num == 1) { System.out.println( num + " is not a prime number"); } else { for(int i = 2; i
Read MoreCreating String Object from Character Array in Java
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);Examplepublic class Demo { public static void main(String[] args) { char[] ch = { 'T', 'E', 'S', 'T'}; String str = new String(ch); System.out.println(str); } }OutputTEST
Read MoreCreating a string from a subset of the array elements in Java
To get a string from a subset of the character array elements, use the copyValueOf() method. This method returns a String that represents the character sequence in the array specified.Here is our character array.char[] ch = { 'T', 'E', 'S', 'T', 'I', 'N', 'G'};Now, let us create a string from the subset of the above array elements.String str = String.copyValueOf(ch, 4, 2);Examplepublic class Demo { public static void main(String[] args) { char[] ch = { 'T', 'E', 'S', 'T', 'I', 'N', 'G'}; String str = String.copyValueOf(ch, 4, 2); System.out.println(str); } }OutputIN
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