Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Programming Articles
Page 1573 of 2547
Get the class name for various objects in Java
The getName() method is used to get the names of the entities such as interface, class, array class, void etc. that are represented by the class objects. These names are returned in the form of a string. The getPackage() method gets the package for the given class.A program that gets the class name for various objects is given as follows −Examplepackage Test; import java.io.IOException; import java.util.HashMap; public class Demo { public static void main(String args[]) throws IOException { Object obj = "string"; System.out.println("The class name is: " + obj.getClass().getName()); obj ...
Read MoreChange date formatting symbols in Java
For date formatting symbols, use the DateFormatSymbols class.Firstly, set weekdays using a string arrayString[] weekDays2 = { "", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday" };Now, set short week days withDateFormatSymbols mySymbols = new DateFormatSymbols(); mySymbols.setShortWeekdays(weekDays2);Get the date −dateFormat = new SimpleDateFormat("EEEE, dd MMM yyyy", mySymbols); System.out.println(dateFormat.format(new Date()));The following is an example −Exampleimport java.text.SimpleDateFormat; import java.text.DateFormat; import java.text.DateFormatSymbols; import java.util.Date; public class Demo { public static void main(String[] args) { String[] weekDays1 = { "", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" }; String[] weekDays2 = { "", "monday", "tuesday", "wednesday", "thursday", "friday", ...
Read MoreGet Canonical Name for a class in Java
The canonical name of a class can be obtained using the java.lang.Class.getCanonicalName() method. This method returns the canonical name of the underlying class and returns null if there is no canonical name for the underlying class.A program that demonstrates the getCanonicalName() method to obtain the canonical name is given as follows −Examplepackage Test; import java.lang.*; public class Demo { public static void main(String[] args) { Demo obj = new Demo(); Class c = obj.getClass(); System.out.println("The canonical name of the underlying Class is: " + c.getCanonicalName()); } }OutputThe canonical name ...
Read MoreJava program to print all distinct elements of a given integer array in Java
All distinct elements of an array are printed i.e. all the elements in the array are printed only once and duplicate elements are not printed. An example of this is given as follows.Array = 1 5 9 1 4 9 6 5 9 7 Distinct elements of above array = 1 5 9 4 6 7A program that demonstrates this is given as follows.Examplepublic class Example { public static void main (String[] args) { int arr[] = {1, 5, 9, 1, 4, 9, 6, 5, 9, 7}; int n = arr.length; ...
Read MoreJava Program to list Short Weekday Names
To list short weekday names, use the getShortWeekdays() from the DateFormatSymbols class in Java.DateFormatSymbols is a class for encapsulating localizable date-time formatting data.Get short weekday names in an arrayString[] days = new DateFormatSymbols().getShortWeekdays();Display the weekdayfor (int i = 0; i < days.length; i++) { String weekday = days[i]; System.out.println(weekday); }The following is an example −Exampleimport java.text.DateFormatSymbols; public class Demo { public static void main(String[] args) { String[] days = new DateFormatSymbols().getShortWeekdays(); for (int i = 0; i < days.length; i++) { String weekday = days[i]; System.out.println(weekday); } } }OutputSun Mon Tue Wed Thu Fri Sat
Read MoreUse reflection to create, fill, and display an array in Java
An array is created using the java.lang.reflect.Array.newInstance() method. This method basically creates a new array with the required component type as well as length.The array is filled using the java.lang.reflect.Array.setInt() method. This method sets the required integer value at the index specified for the array.The array displayed using the for loop. A program that demonstrates this is given as follows −Exampleimport java.lang.reflect.Array; public class Demo { public static void main (String args[]) { int arr[] = (int[])Array.newInstance(int.class, 10); int size = Array.getLength(arr); for (int i = 0; i
Read MoreConvert array to generic list with Java Reflections
An array can be converted into a fixed size list using the java.util.Arrays.asList() method. This method is basically a bridge between array based AP!’s and collection based API’s.A program that demonstrates the conversion of an array into a generic list is given as follows −Exampleimport java.util.Arrays; import java.util.Collections; import java.util.List; public class Demo { public static void main(String[] args) { String str[] = new String[]{"apple", "orange", "mango", "guava", "melon"}; List list = Arrays.asList(str); System.out.println("The list is: " + list); } }The output of the above program is as follows ...
Read MoreSort subset of array elements in Java
The java.util.Arrays.sort() method can be used to sort a subset of the array elements in Java. This method has three arguments i.e. the array to be sorted, the index of the first element of the subset (included in the sorted elements) and the index of the last element of the subset (excluded from the sorted elements). Also, the Arrays.sort() method does not return any value.A program that demonstrates this is given as follows −Exampleimport java.util.Arrays; public class Demo { public static void main(String[] args) { int arr[] = { 1, 9, 7, 3, 2, 8, 4, ...
Read MoreIncrement a Date using the Java Calendar Class
Import the following package for Calendar class in Javaimport java.util.Calendar;Firstly, create a Calendar object and display the current dateCalendar calendar = Calendar.getInstance(); System.out.println("Current Date = " + calendar.getTime());Now, let us increment the date using the add() method and Calendar.DATE constantcalendar.add(Calendar.DATE, 2);The following is the complete exampleExampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); System.out.println("Current Date = " + calendar.getTime()); // Incrementing date by 2 calendar.add(Calendar.DATE, 2); System.out.println("Updated Date = " + calendar.getTime()); } }OutputCurrent Date ...
Read MoreJava Program to decrement a Date using the Calendar Class
Import the following package for Calendar class in Javaimport java.util.Calendar;Firstly, create a Calendar object and display the current dateCalendar calendar = Calendar.getInstance(); System.out.println("Current Date = " + calendar.getTime());Now, let us decrement the date using the add() method and Calendar.DATE constant. Set a negative value since we are decrementing the datecalendar.add(Calendar.DATE, -3);The following is an exampleExampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); System.out.println("Current Date = " + calendar.getTime()); // Decrementing date by 3 calendar.add(Calendar.DATE, -3); System.out.println("Updated ...
Read More