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Programming Articles
Page 1526 of 2547
DoubleStream forEachOrdered() method in Java
The forEachOrdered() method of the DoubleStream class in Java performs an action for each element of this stream. This assures that each element is processed in encounter order for streams that have a defined encounter order.The syntax is as followsvoid forEachOrdered(DoubleConsumer action)Here, DoubleConsumer represents an operation that accepts a single double-valued argument and returns no result. The parameter action is a non-interfering action to perform on the elements.To use the DoubleStream class in Java, import the following packageimport java.util.stream.DoubleStream;The following is an example to implement DoubleStream forEachOrdered() method in Java:Exampleimport java.util.stream.DoubleStream; public class Demo { public static void main(String[] ...
Read MoreLoop through ArrayList in Java
The elements of the ArrayList can be accessed one by one by using a for loop. A program that demonstrates this is given as followsExampleimport java.util.ArrayList; import java.util.List; public class Demo { public static void main(String[] args) { ArrayList aList = new ArrayList(); aList.add("Sun"); aList.add("Moon"); aList.add("Star"); aList.add("Planet"); aList.add("Comet"); System.out.println("The ArrayList elements are:"); for (String s : aList) { System.out.println(s); } } }OutputThe output of the above program ...
Read MoreCreate a TreepMap in Java and add elements
Let us create TreeMap in Java. It stores unique elements in ascending order −TreeMap m = new TreeMap();Now let us add some elements −m.put(1, "PHP"); m.put(2, "jQuery"); m.put(3, "JavaScript"); m.put(4, "Ruby"); m.put(5, "Java"); m.put(6, "AngularJS"); m.put(7, "ExpressJS");The following is an example to create a TreeMap −Exampleimport java.util.*; public class Demo { public static void main(String args[]) { TreeMap m = new TreeMap(); m.put(1, "PHP"); m.put(2, "jQuery"); m.put(3, "JavaScript"); m.put(4, "Ruby"); m.put(5, "Java"); m.put(6, "AngularJS"); m.put(7, ...
Read MoreIntStream of() method in Java
The IntStream class in Java the following two forms of of() methodIntStream of(int t) methodThe following of() method returns a sequential IntStream containing a single element. Here is the syntaxstatic IntStream of(int t)Here, parameter t is the single element.IntStream of(int… values) methodThe following of() method returns a sequentially ordered stream whose elements are the specified valuesstatic IntStream of(int… values)Here, the parameter values are the elements of the new stream.The following is an example to implement IntStream of() method in JavaExampleimport java.util.*; import java.util.stream.IntStream; public class Demo { public static void main(String[] args) { IntStream intStream = ...
Read MoreCollectors maxBy() method in Java 8
The maxBy() method of the Collectors class in Java 8 returns a Collector that produces the maximal element according to a given Comparator, described as an Optional.The syntax is as followsstatic Collector maxBy(Comparator
Read MoreWhich one is better in between pass by value or pass by reference in C++?
In C++ we can pass arguments into a function in different ways. These different ways are −Call by ValueCall by ReferenceCall by AddressSometimes the call by address is referred to as call by reference, but they are different in C++. Incall by address, we use pointer variables to send the exact memory address, but in call by reference we pass the reference variable (alias of that variable). This feature is not present in C, there we have to pass the pointer to get that effect.In this section, we will see what are the advantages of call by reference over call ...
Read MoreIntStream forEach() method in Java
The forEach() method is used in Java to perform an action for each element of this stream. Display the stream using the forEach() method in Java IntStreamThe syntax is as followsvoid forEach(IntConsumer action)Here, action is a non-interfering action to perform on the elements.Create IntStream and add elementsIntStream intStream = IntStream.of(15, 30, 40, 60, 75, 90);Now, display the streamintStream.forEach(System.out::println);The following is an example to implement IntStream forEach() method in JavaExampleimport java.util.*; import java.util.stream.IntStream; public class Demo { public static void main(String[] args) { IntStream intStream = IntStream.of(15, 30, 40, 60, 75, 90); intStream.forEach(System.out::println); } }Output15 30 40 60 75 90
Read MoreThe toArray() method of Java AbstractCollection class
The toArray() method of the AbstractCollection class is used to return the elements in this collection. The elements are returned in the form of an array.The syntax is as followspublic Object[] toArray()To work with AbstractCollection class in Java, import the following packageimport java.util.AbstractCollection;At first, declare AbstractCollection and add some elementsAbstractCollection absCollection = new ArrayList(); absCollection.add("Laptop"); absCollection.add("Tablet"); absCollection.add("Mobile"); absCollection.add("E-Book Reader");Now, use the toArray() method to return the elements in the form of an arrayObject[] myArr = absCollection.toArray();The following is an example to implement AbstractCollection toArray() method in JavaExampleimport java.util.ArrayList; import java.util.AbstractCollection; public class Demo { public static void main(String[] args) ...
Read MoreHow to delete cookies with JSP?
To delete cookies is very simple. If you want to delete a cookie, then you simply need to follow these three steps −Read an already existing cookie and store it in Cookie object.Set cookie age as zero using the setMaxAge() method to delete an existing cookie.Add this cookie back into the response header.Following example will show you how to delete an existing cookie named "first_name" and when you run main.jsp JSP next time, it will return null value for first_name.Example Reading Cookies Reading ...
Read MoreIntStream generate() method in Java
The generate() method in the IntStream class returns an infinite sequential unordered stream where each element is generated by the provided IntSupplier.The syntax is as followsstatic IntStream generate(IntSupplier i)Here, i is the IntSupplier for generated elements. The IntSupplier represents a supplier of int-valued results.The following is an example to implement IntStream generate() method in Java. We have used the limit() method here as well to limit the number of elements we want from the streamExampleimport java.util.*; import java.util.stream.IntStream; public class Demo { public static void main(String[] args) { IntStream intStream = IntStream.generate(() -> ...
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