The contains() method of the CopyOnWriteArrayList class is used to get the specified element. It returns TRUE if the element is in the List, else FALSE is returned.The syntax is as followsboolean contains(Object ob)Here, ob is the element to be checked for existence. To work with CopyOnWriteArrayList class, you need to import the following packageimport java.util.concurrent.CopyOnWriteArrayList;The following is an example to implement CopyOnWriteArrayList class contains() method in JavaExample Live Demoimport java.util.concurrent.CopyOnWriteArrayList; public class Demo {    public static void main(String[] args) {       CopyOnWriteArrayList arrList = new CopyOnWriteArrayList();       arrList.add(100);       arrList.add(250);       ... Read More

The day of the month for a particular MonthDay can be obtained using the getDayOfMonth() method in the MonthDay class in Java. This method requires no parameters and it returns the day of the month which can be in the range of 1 to 31.A program that demonstrates this is given as followsExample Live Demoimport java.time.*; public class Demo {    public static void main(String[] args) {       MonthDay md = MonthDay.parse("--02-22");       System.out.println("The MonthDay is: " + md);       System.out.println("The day of the month is: " + md.getDayOfMonth());    } }OutputThe MonthDay is: --02-22 ... Read More

The equality of two MonthDay objects can be determined using the equals() method in the MonthDay class in Java. This method requires a single parameter i.e. the MonthDay object to be compared. Also it returns true if both the MonthDay objects are equal and false otherwise.A program that demonstrates this is given as followsExample Live Demoimport java.time.*; public class Main {    public static void main(String[] args) {       MonthDay md1 = MonthDay.parse("--02-22");       MonthDay md2 = MonthDay.parse("--02-22");       System.out.println("The MonthDay md1 is: " + md1);       System.out.println("The MonthDay md2 is: " + ... Read More

The MonthDay can be formatted with the specified formatter using the format() method in the MonthDay class in Java. This method requires a single parameter i.e. the MonthDay object to be formatted and it returns the formatted MonthDay with the specified formatter.A program that demonstrates this is given as followsExample Live Demoimport java.time.*; import java.time.temporal.*; import java.time.format.DateTimeFormatter;    public class Demo {       public static void main(String[] args) {       MonthDay md = MonthDay.parse("--02-22");       LocalDate ld = md.atYear(2019);       System.out.println("The MonthDay is: " + md);       DateTimeFormatter dtf = DateTimeFormatter.ofPattern("YYYY-MM-dd"); ... Read More

Two MonthDay objects can be compared using the compareTo() method in the MonthDay class in Java. This method requires a single parameter i.e. the MonthDay object to be compared.If the first MonthDay object is greater than the second MonthDay object it returns a positive number, if the first MonthDay object is lesser than the second MonthDay object it returns a negative number and if both the MonthDay objects are equal it returns zero.A program that demonstrates this is given as followsExample Live Demoimport java.time.*; public class Main {    public static void main(String[] args) {       MonthDay md1 = ... Read More

The flatMap() method of the IntStream class returns a stream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.The syntax is as followsIntStream flatMap(IntFunction

It can be checked if a year is valid or not for a MonthDay object using the isValidYear() method in the MonthDay class in Java. This method requires a single parameter i.e. the year which is to be checked. Also, it returns true if the year is valid for a MonthDay object and false if the year is not valid for a MonthDay object.A program that demonstrates this is given as followsExample Live Demoimport java.time.*; public class Demo {    public static void main(String[] args) {       MonthDay md = MonthDay.parse("--02-21");       System.out.println("The MonthDay is: " + ... Read More

The IntStream map() method returns the new stream consisting of the results of applying the given function to the elements of this stream.The syntax is as followsIntStream map(IntUnaryOperator mapper)Here, mapper parameter is a non-interfering, stateless function to apply to each elementCreate an IntStream and add some elementsIntStream intStream1 = IntStream.of(20, 35, 40, 55, 60);Now, map it with the new IntStream and display the updated stream elements applying the condition in the map() functionIntStream intStream2 = intStream1.map(a -> (a + a));The following is an example to implement IntStream map() method in JavaExample Live Demoimport java.util.*; import java.util.stream.IntStream; public class Demo {   ... Read More

It can be checked if a ChronoField is supported by the MonthDay class or not by using the isSupported() method in the MonthDay class in Java. This method requires a single parameter i.e. the ChronoField to check. It returns true if the ChronoField is supported by the MonthDay class and false otherwise.A program that demonstrates this is given as followsExample Live Demoimport java.time.*; import java.time.temporal.*; public class Demo {    public static void main(String[] args) {       MonthDay md = MonthDay.now();       System.out.println("The MonthDay is: " + md);       boolean flag = md.isSupported(ChronoField.MONTH_OF_YEAR);     ... Read More

To check whether the list is empty or not, use the isEmpty() method. TRUE is returned if the list is empty, else FALSE is the return value.The syntax is as followsboolean isEmpty()To work with CopyOnWriteArrayList class, you need to import the following packageimport java.util.concurrent.CopyOnWriteArrayList;The following is an example to implement CopyOnWriteArrayList class isEmpty() method in JavaExample Live Demoimport java.util.concurrent.CopyOnWriteArrayList; public class Demo {    public static void main(String[] args) {       CopyOnWriteArrayList arrList = new CopyOnWriteArrayList();       arrList.add(30);       arrList.add(40);       arrList.add(60);       arrList.add(70);       arrList.add(90);       ... Read More