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Programming Articles
Page 1507 of 2547
DoubleStream parallel() method in Java
The parallel() method of the DoubleStream class returns an equivalent stream which is parallel.The syntax is as followsDoubleStream parallel()To use the DoubleStream class in Java, import the following packageimport java.util.stream.DoubleStream;The following is an example to implement DoubleStream parallel() method in JavaExampleimport java.util.*; import java.util.stream.DoubleStream; public class Demo { public static void main(String[] args) { DoubleStream doubleStream = DoubleStream.of(35.8, 14.9, 23.3, 67.8, 89.4, 45.6); System.out.println("Parallel DoubleStream = "); doubleStream.parallel().forEach(System.out::println); } }OutputParallel DoubleStream = 67.8 14.9 23.3 89.4 45.6 35.8
Read MoreThe clear() method of CopyOnWriteArrayListin Java
To remove all the elements from the CopyOnWriteArrayList, use the clear() method. It empties the list.The syntax is as follows:void clear()To work with CopyOnWriteArrayList class, you need to import the following package:import java.util.concurrent.CopyOnWriteArrayList;The following is an example to implement CopyOnWriteArrayList class clear() method in Java:Exampleimport java.util.concurrent.CopyOnWriteArrayList; public class Demo { public static void main(String[] args) { CopyOnWriteArrayList arrList = new CopyOnWriteArrayList(); arrList.add(220); arrList.add(250); arrList.add(400); arrList.add(500); arrList.add(650); arrList.add(700); arrList.add(800); System.out.println("CopyOnWriteArrayList String Representation = ...
Read MoreProgram to iterate over a List using Java 8 Lambda
Let us first create a List and add elements −ArrayListarrayList = new ArrayList(); arrayList.add("100"); arrayList.add("200"); arrayList.add("300"); arrayList.add("400"); arrayList.add("500");Now, iterate over it with Lambda Expressions −ArrayListlist = arrayList; System.out.println("Iterating..."); list.stream().forEach(elem -> System.out.println(elem));Exampleimport java.util.ArrayList; import java.util.List; public class Demo { public static void main(String[] args) { ArrayListarrayList = new ArrayList(); arrayList.add("100"); arrayList.add("200"); arrayList.add("300"); arrayList.add("400"); arrayList.add("500"); arrayList.add("600"); arrayList.add("700"); arrayList.add("800"); arrayList.add("900"); arrayList.add("1000"); System.out.println("ArrayList..."); for ...
Read MoreLinkedBlockingDeque in Java
The LinkedBlockingDeque Class in Java has a blockingdeque that is optionally bounded and based on linked nodes. This class implements the Collection interface as well as the AbstractQueue class. It is a part of the Java Collection Framework.A program that demonstrates this is given as follows −Exampleimport java.util.concurrent.LinkedBlockingDeque; public class Demo { public static void main(String[] args) { LinkedBlockingDeque lbDeque = new LinkedBlockingDeque(); lbDeque.add("James"); lbDeque.add("May"); lbDeque.add("John"); lbDeque.add("Sara"); lbDeque.add("Anne"); System.out.println("Size of LinkedBlockingDeque is: " + lbDeque.size()); ...
Read MoreLongStream range() method in Java
The range() method of the LongStream class in Java returns a sequential ordered LongStream from startInclusive to endExclusive by an incremental step of 1. This is inclusive of the initial element and exclusive of the last element.The syntax is as follows:static LongStream range(long startInclusive, long endExclusive)Here, startInclusive is the first value, whereas the endExclusive is the last.To use the LongStream class in Java, import the following package:import java.util.stream.LongStream;The following is an example to implement LongStream range() method in Java:Exampleimport java.util.stream.LongStream; public class Demo { public static void main(String[] args) { LongStream longStream = LongStream.range(20L, 25L); ...
Read MoreHow to convert Float array list to float array in Java?
Let us first create a float array list −ArrayList < Float > arrList = new ArrayList < Float > (); arrList.add(5.2 f); arrList.add(10.3 f); arrList.add(15.3 f); arrList.add(20.4 f);Now, convert the float array list to float array. At first, we have set the same size to float array i.e. the same number of elements. After that, we have assigned each value −final float[] arr = new float[arrList.size()]; int index = 0; for (final Float value: arrList) { arr[index++] = value; }Exampleimport java.util.ArrayList; public class Demo { public static void main(String[] args) { ArrayListarrList = new ArrayList(); ...
Read MoreHow can I generate random booleans in Java?
To generate random booleans like TRUE or FALSE, at first create a new Random object −Random randNum = new Random();Now, loop through the count of booleans you want and generate random booleans with nextBooleans() method −for (int i = 1; i
Read MoreRemoving an element from C++ std::vector<> by index?
Remove an element from C++ std::vector by index can be done by following way −Example#include #include using namespace std; int main() { vector v; //declare vector //insert elements into vector v.push_back(-10); v.push_back(7); v.push_back(6); // Deletes the first element (v[0]) v.erase(v.begin() ); for (int i = 0; i < v.size(); i++) cout
Read MoreConcurrentSkipListSet in Java
The ConcurrentSkipListSet has elements that are sorted by default. Also, its implementation is based on the ConcurrentSkipListMap. The ConcurrentSkipListSet class also implements the Collection interface as well as the AbstractSet class. It is a part of the Java Collection Framework.A program that demonstrates this is given as follows −Exampleimport java.util.concurrent.ConcurrentSkipListSet; public class Demo { public static void main(String[] args) { ConcurrentSkipListSet csls = new ConcurrentSkipListSet(); csls.add(7); csls.add(4); csls.add(1); csls.add(9); csls.add(3); System.out.println("The elements in ConcurrentSkipListSet are: " + csls); ...
Read MoreArrayBlockingQueue drainTo() Method in Java
The drainTo() method of the ArrayBlockingQueue class removes all available elements from this queue and adds them to the given collection. It returns the number of elements transferred.The syntax is as followsint drainTo(Collection
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