Programming Articles - Page 2253 of 3363

To get the list of keys of a SortedList object, the code is as follows −Example Live Demousing System; using System.Collections; public class Demo {    public static void Main(String[] args) {       SortedList list1 = new SortedList();       list1.Add("One", 1);       list1.Add("Two ", 2);       list1.Add("Three ", 3);       list1.Add("Four", 4);       list1.Add("Five", 5);       list1.Add("Six", 6);       list1.Add("Seven ", 7);       list1.Add("Eight ", 8);       list1.Add("Nine", 9);       list1.Add("Ten", 10);       Console.WriteLine("SortedList1 elements...");     ... Read More

To get or set the number of elements in the BitArray, the code is as follows −Example Live Demousing System; using System.Collections; public class Demo {    public static void Main() {       BitArray arr1 = new BitArray(2);       BitArray arr2 = new BitArray(2);       arr1[0] = false;       arr1[1] = true;       Console.WriteLine("BitArray1 length = "+arr1.Length);       Console.WriteLine("Elements in BitArray1...");       foreach (bool res in arr1) {          Console.WriteLine(res);       }       arr2[0] = false;       arr2[1] ... Read More

To compute the Union of SortedSet to a Collection, the code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main() {       SortedSet set1 = new SortedSet();       set1.Add(50);       set1.Add(100);       set1.Add(150);       Console.WriteLine("SortedSet1 elements...");       foreach(int ele in set1) {          Console.WriteLine(ele);       }       SortedSet set2 = new SortedSet();       set2.Add(100);       set2.Add(150);       set2.Add(200);       set2.Add(250);       Console.WriteLine("SortedSet2 elements..."); ... Read More

Let us see how to implement Bitwise OR operation between the elements of BitArray −Example Live Demousing System; using System.Collections; public class Demo {    public static void Main() {       BitArray arr1 = new BitArray(5);       BitArray arr2 = new BitArray(5);       arr1[0] = false;       arr1[1] = false;       arr2[0] = false;       arr2[1] = true;       Console.WriteLine("BitArray1 elements...");       foreach (bool res in arr1) {          Console.WriteLine(res);       }       Console.WriteLine("BitArray2 elements...");       ... Read More

To get or set the element at the specified index in ArrayList, the code is as follows −Example Live Demousing System; using System.Collections; public class Demo {    public static void Main() {       ArrayList arrList = new ArrayList();       arrList.Add("Laptop");       arrList.Add("Desktop");       arrList.Add("Notebook");       arrList.Add("Ultrabook");       arrList.Add("Tablet");       arrList.Add("Headphone");       arrList.Add("Speaker");       Console.WriteLine("Elements in ArrayList...");       foreach(string str in arrList) {          Console.WriteLine(str);       }       Console.WriteLine("Element at index 5 = " ... Read More

To get or set the element at specified index in Collection, the code is as follows −Example Live Demousing System; using System.Collections.ObjectModel; public class Demo {    public static void Main() {       Collection col = new Collection();       col.Add("Laptop");       col.Add("Desktop");       col.Add("Notebook");       col.Add("Ultrabook");       col.Add("Tablet");       col.Add("Headphone");       col.Add("Speaker");       Console.WriteLine("Elements in Collection...");       foreach(string str in col) {          Console.WriteLine(str);       }       Console.WriteLine("Element at index 3 = " + ... Read More

To get or set at specified index in StringCollection, the code is as follows −Example Live Demousing System; using System.Collections.Specialized; public class Demo {    public static void Main() {       StringCollection strCol = new StringCollection();       String[] strArr = new String[] { "A", "B", "C", "D", "E", "F", "G", "H" };       Console.WriteLine("StringCollection elements...");       foreach (string str in strArr) {          Console.WriteLine(str);       }       strCol.AddRange(strArr);       Console.WriteLine("Element at 5th index = "+strCol[5]);    } }OutputThis will produce the following output −StringCollection elements... ... Read More

To check if SortedSet and a specified collection share common element, the code is as follows −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main() {       SortedSet set1 = new SortedSet();       set1.Add(100);       set1.Add(200);       set1.Add(300);       set1.Add(400);       set1.Add(500);       set1.Add(600);       SortedSet set2 = new SortedSet();       set2.Add(100);       set2.Add(200);       set2.Add(300);       set2.Add(400);       set2.Add(500);       set2.Add(600);       Console.WriteLine("Does it ... Read More

A lambda expression is an anonymous function without having any name and does not belong to any class that means it is a block of code that can be passed around to execute.Syntax(parameter-list) -> {body}We can implement a lambda expression without creating an anonymous inner class in the below program. For the button's ActionListener interface, we need to override one abstract method addActionListener() and implement the block of code using the lambda expression.Exampleimport java.awt.*; import java.awt.event.*; import javax.swing.*; public class LambdaExpressionButtonTest extends JFrame {    private JButton btn;    public LambdaExpressionButtonTest() {       btn = new JButton("Click on the button"); ... Read More

Anonymous class is an inner class without a name, which means that we can declare and instantiate class at the same time. A lambda expression is a short form for writing an anonymous class. By using a lambda expression, we can declare methods without any name.Anonymous class vs Lambda ExpressionAn anonymous class object generates a separate class file after compilation that increases the size of a jar file while a lambda expression is converted into a private method. It uses invokedynamic bytecode instruction to bind this method dynamically, which saves time and memory.We use this keyword to represent the current class in lambda expression while in the ... Read More