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Java Articles
Page 54 of 450
The toArray() method of CopyOnWriteArrayListin Java
The toArray() method is used to return an array containing all the elements in this list in proper sequence.The syntax is as follows −Object[] toArray()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 toArray() method in Java−Exampleimport java.util.Arrays; import 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); ...
Read MoreLongStream summaryStatistics() method in Java
The summaryStatistics() method in the LongStream class in Java returns a LongSummaryStatistics describing various summary data about the elements of this stream.The syntax is as follows −LongSummaryStatistics summaryStatistics()Here, LongSummaryStatistics is a state object for collecting statistics such as count, min, max, etc.To use the LongStream class in Java, import the following packageimport java.util.stream.LongStream;Create LongStream and add some elements −LongStream longStream = LongStream.of(30000L, 15000L, 20000l, 25000l, 30000l);Now, get the statistics −LongSummaryStatistics info = longStream.summaryStatistics(); The following is an example to implement LongStream summaryStatistics() method in Java −Exampleimport java.util.stream.LongStream; import java.util.LongSummaryStatistics; public class Demo { public static void ...
Read MoreLongStream asDoubleStream() method in Java
The asDoubleStream() method of the LongStream class in Java returns a DoubleStream consisting of the elements of this stream, converted to double.The syntax is as follows.DoubleStream asDoubleStream()Here, DoubleStream is a sequence of primitive double-valued elements. To use the LongStream class in Java, import the following package.import java.util.stream.LongStream;Create LongStream and add elements.LongStream longStream = LongStream.of(2000L, 35000L, 45000L);Now, convert it to double and return using asDoubleStream() method.DoubleStream s = longStream.asDoubleStream();The following is an example to implement LongStream asDoubleStream() method.Exampleimport java.util.stream.LongStream; import java.util.stream.DoubleStream; public class Demo { public static void main(String[] args) { LongStream longStream = LongStream.of(2000L, 35000L, 45000L); ...
Read MoreLongStream limit() method in Java
The limit() method of the LongStream class in Java returns a stream consisting of the elements of this stream, truncated to be no longer than max in length. Here, max is the parameter of the method.The syntax is as follows.LongStream limit(long max)Here, max is the number of elements the stream should be limited to.To use the LongStream class in Java, import the following package.import java.util.stream.LongStream;Create a LongStream and add elements.LongStream longStream = LongStream.of(2000L, 35000L, 45000L, 50500L, 65000L, 72000L);Now, let’s say you only want to return 4 elements. For that, use the limit as 4.longStream.limit(4).The following is an example to implement ...
Read MoreLongStream sequential() method in Java
The sequential() method of the LongStream class in Java returns an equivalent stream that is sequential.The syntax is as follows −LongStream sequential()To use the LongStream class in Java, import the following package −import java.util.stream.LongStream;Create a LongStream and add some elements −LongStream longStream = LongStream.of(50L, 70L, 100L, 150L, 200L, 300L);Now, return an equivalent stream that is sequential −LongStream res = longStream.sequential(); The following is an example to implement LongStream sequential() method in Java −Exampleimport java.util.stream.LongStream; public class Demo { public static void main(String[] args) { LongStream longStream = LongStream.of(50L, 70L, 100L, 150L, ...
Read MoreLongStream count() method in Java
The count() method of the LongStream class in Java is used to return the count of elements in this stream.The syntax is as follows.long count()To use the LongStream class in Java, import the following package.import java.util.stream.LongStream;Create a LongStream and add some elements.LongStream longStream = LongStream.of(50L, 30L, 80L, 40L, 15L, 60L);Now, get the count of elements.longStream.count()The following is an example to implement LongStream count() method in Java.Exampleimport java.util.stream.LongStream; public class Demo { public static void main(String[] args) { LongStream longStream = LongStream.of(50L, 30L, 80L, 40L, 15L, 60L); System.out.println("The number of elements in the stream ...
Read MoreThe isEmpty() method of AbstractSequentialList in Java
The isEmpty() method of the AbstractSequentialList class is used to check whether the list is empty or not. If it is empty, then TRUE is returned, else FALSE.The syntax is as follows.public boolean isEmpty()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 isEmpty() method in Java.Exampleimport java.util.LinkedList; import java.util.AbstractSequentialList; public class Demo { public static void main(String[] args) { AbstractSequentialList absSequential = new LinkedList(); absSequential.add(110); absSequential.add(320); absSequential.add(400); absSequential.add(550); absSequential.add(600); absSequential.add(700); absSequential.add(900); System.out.println("Elements in ...
Read MoreLocalDate until() Method in Java
The difference between two LocalDate objects can be obtained using the until() method in the LocalDate class in Java. This method requires a single parameter i.e. the end date for the LocalDate object and it returns the difference between two LocalDate objects using a Period object.A program that demonstrates this is given as follows:Exampleimport java.time.*; public class Demo { public static void main(String[] args) { LocalDate ld1 = LocalDate.parse("2019-01-10"); LocalDate ld2 = LocalDate.parse("2019-02-14"); System.out.println("The first LocalDate is: " + ld1); System.out.println("The second LocalDate is: " + ld2); ...
Read MorePeriod getYears() method in Java
The number of years for a particular Period can be obtained using the getYears() method in the Period class in Java. This method requires no parameters and it returns the number of years in the Period.A program that demonstrates this is given as followsExampleimport java.time.Period; public class Demo { public static void main(String[] args) { String period = "P5Y7M15D"; Period p = Period.parse(period); System.out.println("The Period is: " + p); System.out.println("The number of years are: " + p.getYears()); } }OutputThe Period is: P5Y7M15D The number of years ...
Read MoreIntStream sum() method in Java
The sum() method of the IntStream class is used in Java to return the sum of elements in this stream.The syntax is as follows −int sum()To work with the IntStream class in Java, import the following package −import java.util.stream.IntStream;Create IntStream and add some elements −IntStream intStream = IntStream.of(50, 100, 150, 200, 250, 300);Now, return the sum of elements in the IntStream added above −int sumVal = intStream.sum();The following is an example to implement IntStream sum() method in Java −Exampleimport java.util.stream.IntStream; public class Demo { public static void main(String[] args) { IntStream intStream = IntStream.of(50, 100, ...
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