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Articles on Trending Technologies
Technical articles with clear explanations and examples
LinkedTransferQueue in Java
The LinkedTransferQueue Class in Java has a transfer queue that has unbounded functionality and is based on linked nodes. It uses FIFO for ordering elements. 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.LinkedTransferQueue; public class Demo { public static void main(String[] args) throws InterruptedException { LinkedTransferQueue ltQueue = new LinkedTransferQueue(); ltQueue.add("Amy"); ltQueue.add("John"); ltQueue.add("May"); ltQueue.add("Harry"); ltQueue.add("Anne"); ...
Read MoreHow to retain elements from a Collection in another Collection
Let’s say the following is our Collection i.e. ArrayList −Listlist = new ArrayList(); list.add(100); list.add(200); list.add(200); list.add(200); list.add(300); list.add(400); list.add(400); list.add(500);Now, create another Collection −List list2 = new ArrayList(); list2.add(100); list2.add(200); list2.add(300); list2.add(400);To retain all elements from a Collection in another Collection, try the following with list and list2 as our two Collections −list.retainAll(list2);Exampleimport java.util.ArrayList; import java.util.List; public class Demo { public static void main(String args[]) throws Exception { Listlist = new ArrayList(); list.add(100); list.add(200); list.add(200); list.add(200); list.add(300); ...
Read MoreThe add() method of Java AbstractSequentialList class
The AbstractSequentialList class has the add(int index, E ele) method to add element to the specific position. You can also use the add() method inherited from AbstractList class.add(int index, E ele) methodThe syntax is as follows:add(int index, E ele)Here, index is where the element is to be inserted. The ele is the element to be inserted.To work with the AbstractSequentialList class in Java, you need to import the following package:import java.util.AbstractSequentialList;The following is an example to implement AbstractSequentialList add() method in Java:Exampleimport java.util.LinkedList; import java.util.AbstractSequentialList; public class Demo { public static void main(String[] args) { AbstractSequentialList ...
Read MoreHow to test if a List is an Unmodifable List in Java?
We will first set a list to unmodifiable and after that test if it is unmodifiable or not. Let us create a List and add elements −List list = new LinkedList (); list.add(10); list.add(20); list.add(30); list.add(40); list.add(50);Set the above list to unmodifiable −Listunmodifiable = Collections.unmodifiableList(list);Now, use If-else, to check whether the list in unmodifiable or not −if (unmodifiable.getClass().getName().contains("UnmodifiableList")) System.out.println("This is an UnmodifiableList" ); else System.out.println("This is not an UnmodifiableList" );Exampleimport java.util.Collections; import java.util.LinkedList; import java.util.List; public class Demo { public static void main(String[] args) { Listlist = new LinkedList(); ...
Read MoreConcurrentLinkedDeque in Java
The ConcurrentLinkedDeque Class in Java implements a deque and used a concurrent linked list for help. This class implements the Collection interface as well as the AbstractCollection class. It is a part of the Java Collection Framework.A program that demonstrates this is given as follows −Exampleimport java.util.concurrent.*; public class Demo { public static void main(String[] args) { ConcurrentLinkedDeque clDeque = new ConcurrentLinkedDeque(); clDeque.add("James"); clDeque.add("May"); clDeque.add("John"); clDeque.add("Sara"); clDeque.add("Anne"); System.out.println("The elements in ConcurrentLinkedDeque are: " + clDeque); } }The ...
Read MoreDoubleStream 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); ...
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