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Programming Articles
Page 1545 of 2547
Schedule a task for execution in Java
One of the methods in the Timer class is the void schedule(Timertask task, Date time) method. This method schedules the specified task for execution at the specified time. If the time is in the past, it schedules the task for immediate execution.Declaration −The java.util.Timer.schedule(Timertask task, Date time) is declared as follows −public void schedule(Timertask task, Date time)There are few exceptions thrown by the schedule(Timertask task, Date time) method. They are as follows −IllegalArgumentExceptionThis exception is thrown if time.getTime() is negativeIllegalStateExceptionThis exception is thrown if task was scheduled or cancelled beforehand, timer was cancelled, or timer thread terminated.NullPointerExceptionThis exception is thrown ...
Read MoreDisplay month by name and number in Java
Use the ‘b’ conversion character for month name in Java.Use the ‘m’ conversion character for month number in Java.Here, we are using Formatter and Calendar class, therefore import the following packages.import java.util.Calendar; import java.util.Formatter;The following is an example to display month name and number −Exampleimport java.util.Calendar; import java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); Calendar cal = Calendar.getInstance(); System.out.println("Current date and time: "+cal.getTime()); f ...
Read MoreSorting collection of String and StringBuffer in Java
In order to sort in Java as we know we can use either Comparable or Comparator interfaces in which we could also define our custom logic to sort.One of the approach to sort is to add the entity in TreeSet or TreeMap which would sort the entries as internally they also uses the comparable interface. Now String class in Java internally implements comparable interface so whenever we add string to a tree set or map it uses comparable logic of string class and sort the input entry strings.But String buffer do not have the implementation of comparable interface so ...
Read MoreDisplay hour with SimpleDateFormat("H") in Java
To work with SimpleDateFormat class in Java, import the following package.import java.text.SimpleDateFormat;Now, set the format with SimpleDateFormat(“H”) to display hour in a day.Format f = new SimpleDateFormat("H");Now, get the hour −String strHour = f.format(new Date());The following is an example −Exampleimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Calendar; public class Demo { public static void main(String[] args) throws Exception { // displaying current date and time Calendar cal = Calendar.getInstance(); SimpleDateFormat simpleformat = new SimpleDateFormat("dd/MMMM/yyyy hh:mm:s"); ...
Read MorePerform Bubble Sort on strings in Java
To perform Bubble Sort, try the below given code. In this each each pair of adjacent elements is compared and the elements are swapped if they are not in order.The following is an example.Examplepublic class Demo { public static void main(String []args) { String str[] = { "s", "k", "r", "v", "n"}; String temp; System.out.println("Sorted string..."); for (int j = 0; j < str.length; j++) { for (int i = j + 1; i < str.length; i++) { ...
Read MoreLeft pad an integer in Java with zeros
Let us see an example first to understand how an integer looks with left padding −888 //left padding with spaces 0000000999 //left padding with 7 zerosLet us see an example to left pad a number with zero −Examplepublic class Demo { public static void main(String[] args) { int val = 9899; System.out.println(String.format("%05d",val)); } }Output09899Let us see another example that pads a greater number of zeros −Examplepublic class Demo { public static void main(String[] args) { int val = 9899; System.out.println(String.format("%010d", val)); } }Output0000009899
Read MoreDisplay minutes with SimpleDateFormat('mm') in Java
To work with SimpleDateFormat class in Java, import the following package.import java.text.SimpleDateFormat;Now, set the format with SimpleDateFormat(“mm”) to display minutes in two-digits.Format f = new SimpleDateFormat(‘”mm”);Now, get the minutes in a string.String strMinute = f.format(new Date());The following is an example −Exampleimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Calendar; public class Demo { public static void main(String[] args) throws Exception { // displaying current date and time Calendar cal = Calendar.getInstance(); SimpleDateFormat simpleformat = new SimpleDateFormat("dd/MMMM/yyyy hh:mm:s"); ...
Read MoreFormat Calendar with String.format() in Java
Firstly, consider an object with date value.Object arrObj[] = { "Date", Calendar.getInstance() };After that, use the String.format() method to format Calendar and display the date.The following is an example.Exampleimport java.util.Calendar; public class Demo { public static void main(String []args){ Object arrObj[] = { "Date", Calendar.getInstance() }; System.out.println("Formatting Date..."); System.out.println(String.format("%1$s = %2$tY %2$tm %2$te", arrObj)); } }OutputFormatting Date... Date = 2018 11 17
Read MoreDisplay complete date and time information using Formatter in Java
Firstly, create a Formatter and Calendar object.Formatter f = new Formatter(); Calendar cal = Calendar.getInstance();Now display the current date and time. We have shown the date here in both lowercase and uppercase −f = new Formatter(); System.out.println(f.format("Date and Time (lowercase): %tc", cal)); f = new Formatter(); System.out.println(f.format("Date and Time (uppercase): %Tc", cal));The following is an example −Exampleimport java.util.Calendar; import java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); Calendar cal = Calendar.getInstance(); ...
Read MoreDisplay the day in week using SimpleDateFormat('E') in Java
To display the day in week, use the SimpleDateFormat(“E”) as shown below −Format f = new SimpleDateFormat("E"); String strDayinWeek = f.format(new Date()); System.out.println("Day in week = "+strDayinWeek);Since, we have used the Format and SimpleDateFormat class above, therefore import the following packages. With that, we have also used the Date.import java.text.Format; import java.text.SimpleDateFormat; import java.util.Date;Exampleimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Calendar; public class Demo { public static void main(String[] args) throws Exception { // displaying current date and time Calendar cal = Calendar.getInstance(); SimpleDateFormat simpleformat = new SimpleDateFormat("dd/MMMM/yyyy hh:mm:s"); ...
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