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Articles by Samual Sam
Page 68 of 151
Create a Stack and Queue using ArrayDeque in Java
Create a stack using ArrayDeque.Deque s = new ArrayDeque(); // stack s.push("Bat"); s.push("Mat"); s.push("Cat"); s.push("Rat"); s.push("Hat"); s.push("Fat");Create a queue using ArrayDeque −Deque q = new ArrayDeque(); // queue q.add("Bat"); q.add("Mat"); q.add("Cat"); q.add("Rat"); q.add("Hat"); q.add("Fat");The following is an example.Exampleimport java.util.ArrayDeque; import java.util.Deque; public class Demo { public static void main(String args[]) { Deque s = new ArrayDeque(); Deque q = new ArrayDeque(); // stack s.push("Bat"); s.push("Mat"); s.push("Cat"); s.push("Rat"); s.push("Hat"); s.push("Fat"); ...
Read MoreByteBuffer compact() method in Java
The buffer can be compacted using the compact() method in the class java.nio.ByteBuffer. This method does not require a parameter and it returns the new compacted ByteBuffer with the same content as the original buffer. If the buffer is read-only, then the ReadOnlyBufferException is thrown.A program that demonstrates this is given as follows −Exampleimport java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { ByteBuffer buffer = ...
Read MoreByteBuffer get() method in Java
The value at the current position of the buffer is read and then incremented using the method get() in the class java.nio.ByteBuffer. This method returns the value that is at the current buffer position. Also, the BufferUnderflowException is thrown if underflow situation occurs.A program that demonstrates this is given as follows −Exampleimport java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { ByteBuffer buffer = ByteBuffer.allocate(n); ...
Read MoreGet Enumeration over HashSet in Java
To get enumeration over HashSet, first declare the HashSet and add elements −HashSet hs = new HashSet(); hs.add("P"); hs.add("Q"); hs.add("R");To get enumeration −Enumeration e = Collections.enumeration(hs);The following is an example to get Enumeration over HashSet −Exampleimport java.util.*; public class Demo { public static void main(String[] args) { HashSet hs = new HashSet(); hs.add("P"); hs.add("Q"); hs.add("R"); Enumeration e = Collections.enumeration(hs); while (e.hasMoreElements()) System.out.println(e.nextElement()); } }OutputP Q R
Read MoreInitialize a Set without using add() method in Java
With Java, you can initialize a set without using add() method.For this create a string array −String arr[] = { "A", "B", "C", "D", "E"};Now, use Set and asList() method to initialize the above string array to our Set −Set s = new HashSet(Arrays.asList(arr));The following is an example to initialize a set without using add() method −Exampleimport java.util.Arrays; import java.util.HashSet; import java.util.Set; public class Demo { public static void main(String[] a) { String arr[] = { "A", "B", "C", "D", "E"}; Set s = new ...
Read MoreByteBuffer asLongBuffer() method in Java
A view of the ByteBuffer can be created as a LongBuffer using the asLongBuffer() method in the class java.nio.ByteBuffer. This method requires no parameters and it returns a long buffer as required. This buffer reflects the changes made to the original buffer and vice versa.A program that demonstrates this is given as follows −Exampleimport java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 50; try { ByteBuffer bufferB = ByteBuffer.allocate(n); LongBuffer bufferL = bufferB.asLongBuffer(); ...
Read MoreNavigableSet Class higher() method in Java
The higher() method in NavigableSet returns the least element strictly greater than the given element i.e. 35 here −higher(35);The following is an example to implement the higher method in Java −Exampleimport java.util.NavigableSet; import java.util.TreeSet; public class Demo { public static void main(String[] args) { NavigableSet set = new TreeSet(); set.add(10); set.add(25); set.add(40); set.add(55); set.add(70); set.add(85); set.add(100); System.out.println("Returned Value = " + set.higher(35)); } }OutputReturned Value = 40
Read MoreAdd elements to LinkedHashMap collection in Java
Use the put() method to add elements to LinkedHashMap collection.First, let us create a LinkedHashMap −LinkedHashMap l = new LinkedHashMap();Now, add elements −l.put("1", "Jack"); l.put("2", "Tom"); l.put("3", "Jimmy"); l.put("4", "Morgan"); l.put("5", "Tim"); l.put("6", "Brad");The following is an example to add elements to LinkedHashMap collection −Exampleimport java.util.LinkedHashMap; public class Demo { public static void main(String[] args) { LinkedHashMap l = new LinkedHashMap(); l.put("1", "Jack"); l.put("2", "Tom"); l.put("3", "Jimmy"); ...
Read MoreConvert an ArrayList to HashSet in Java
To convert ArrayList to HashSet, firstly create an ArrayList −List l = new ArrayList();Add elements to the ArrayList −l.add("Accent"); l.add("Speech"); l.add("Diction"); l.add("Tone"); l.add("Pronunciation");Now convert the ArrayList to HashSet −Set s = new HashSet(l);The following is an example to convert an ArrayList to HashSet in Java.Exampleimport java.util.ArrayList; import java.util.List; import java.util.Set; import java.util.HashSet; public class Main { public static void main(String[] args) { List l = new ArrayList(); l.add("Accent"); l.add("Speech"); l.add("Diction"); ...
Read MoreInstant get() method in Java
The value of the required ChronoField for an Instant can be obtained using the get() method in the Instant class in Java. This method requires a single parameter i.e. the ChronoField and it returns the value of the ChronoField that was passed as a parameter.A program that demonstrates this is given as follows −Exampleimport java.time.*; import java.time.temporal.ChronoField; import java.time.temporal.ValueRange; public class Demo { public static void main(String[] args) { Instant i = Instant.now(); int micro = i.get(ChronoField.MICRO_OF_SECOND); System.out.println("The current Instant is: " + i); System.out.println("The MICRO_OF_SECOND Field ...
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