Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles on Trending Technologies
Technical articles with clear explanations and examples
Convert a Set of String to a comma separated String in Java
Let us first create a set with string values −Setset = new HashSet(Arrays.asList("One", "Two", "Three", "Four", "Five", "Six"));Now, convert it to a comma separated string using String.join() −String str = String.join(", ", set);ExampleFollowing is the program to convert set of string to a comma separated string in Java −import java.util.*; public class Demo { public static void main(String args[]) { Setset = new HashSet(Arrays.asList("One", "Two", "Three", "Four", "Five", "Six")); System.out.println("Set = " + set); String str = String.join(", ", set); System.out.println("Comma separated String: "+ str); } ...
Read MoreConvert a List of String to a comma separated String in Java
At first, let’s say the following is our List of String −List myList = new ArrayList(Arrays.asList("One", "Two", "Three", "Four"));Now, convert this to a comma separated string using String.join()String str = String.join(", ", myList);ExampleFollowing is the program to convert List of String to a comma separated String in Java −import java.util.*; public class Demo { public static void main(String args[]) { List myList = new ArrayList(Arrays.asList("One", "Two", "Three", "Four")); System.out.println("List = " + myList); // comma separated String str = String.join(", ", myList); System.out.println("String (Comma ...
Read MoreConversion of Java Maps to List
At first, let us create a Java Map and initialize −Map map = new HashMap(); map.put(1, "Tom"); map.put(2, "John"); map.put(3, "Kevin"); map.put(4, "Jacob"); map.put(5, "Ryan");Now, convert the Map to List −ArrayList key = new ArrayList(map.keySet()); ArrayList value = new ArrayList(map.values());ExampleFollowing is the program to convert Maps to List in Java −import java.util.HashMap; import java.util.ArrayList; import java.util.Map; public class Demo { public static void main(String args[]) { Map map = new HashMap(); map.put(1, "Tom"); map.put(2, "John"); map.put(3, "Kevin"); map.put(4, "Jacob"); map.put(5, "Ryan"); ...
Read MoreProgram to convert Boxed Array to Stream in Java
A boxed array is an array which is defined in the form of an object, instead of the primitives.ExampleFollowing is the program to convert Boxed Array to Stream in Java −import java.util.*; import java.util.stream.*; public class Demo { public static void main(String args[]) { String arr[] = { "Laptop", "Mobile", "Notebook", "Desktop" }; System.out.println("Array = "+ Arrays.toString(arr)); Streams = Stream.of(arr); System.out.println("Stream (array to stream) = "+ Arrays.toString(s.toArray())); } }OutputArray = [Laptop, Mobile, Notebook, Desktop] Stream (array to stream) = [Laptop, Mobile, Notebook, Desktop]
Read MoreConvert an ArrayList of String to a String array in Java
At first, let us set an ArrayList of string −ArrayList arrList = new ArrayList(); arrList.add("Bentley"); arrList.add("Audi"); arrList.add("Jaguar"); arrList.add("Cadillac");Now, use toArray() to convert to a string array −int size = arrList.size(); String res[] = arrList.toArray(new String[size]);ExampleFollowing is the program to convert an ArrayList of String to a String array in Java −import java.util.*; public class Demo { public static void main(String[] args) { ArrayList arrList = new ArrayList(); arrList.add("Bentley"); arrList.add("Audi"); arrList.add("Jaguar"); arrList.add("Cadillac"); arrList.add("Mazda"); arrList.add("Land Rover"); arrList.add("Porsche"); ...
Read MoreConvert String into comma separated List in Java
At first, set a list with string values −List myList = new ArrayList( Arrays.asList("One", "Two", "Three", "Four"));Now, use String.join() to set them as a comma separated list −String str = String.join(", ", myList);ExampleFollowing is the program to convert string into comma separated List in Java −import java.util.*; public class Demo { public static void main(String args[]) { List myList = new ArrayList(Arrays.asList("One", "Two", "Three", "Four")); System.out.println("List = " + myList); // comma separated String str = String.join(", ", myList); System.out.println("String (Comma Separated) = " ...
Read MoreConvert Set of String to Array of String in Java
At first, create a Set of string −Set setStr = new HashSet(Arrays.asList("osCommerce", "PrestaShop", "Magento", "Wordpres", "Drupal"));Now, use the toArray() method to convert to array of string −String[] arrStr = setStr.toArray(new String[0]);ExampleFollowing is the program to convert Set of String to Array of String in Java −import java.util.Arrays; import java.util.Set; import java.util.HashSet; public class Demo { public static void main(String[] args) { Set setStr = new HashSet( Arrays.asList("osCommerce", "PrestaShop", "Magento", "Wordpres", "Drupal")); System.out.println("Set of String: " + setStr); String[] arrStr = setStr.toArray(new String[0]); System.out.println("Array ...
Read MoreProgram to convert ArrayList to LinkedList in Java
Let’s say the following is our ArrayList −List arrList = Arrays.asList("John", "Jacob", "Kevin", "Katie", "Nathan");Now, convert this ArrayList to LinkedList using toCollection() −List myList = arrList.stream().collect(Collectors.toCollection(LinkedList::new));ExampleFollowing is the program to convert ArrayList to LinkedList in Java −import java.util.*; import java.util.stream.*; public class Demo { public static void main(String args[]) { List arrList = Arrays.asList("John", "Jacob", "Kevin", "Katie", "Nathan"); System.out.println("ArrayList = " + arrList); List myList = arrList.stream().collect(Collectors.toCollection(LinkedList::new)); System.out.println("LinkedList (ArrayList to LinkedList) = " + myList); } }OutputArrayList = [John, Jacob, Kevin, Katie, Nathan] LinkedList (ArrayList to ...
Read MoreProgram to convert a Vector to List in Java
Let’s say the following is our vector with values −Vector v = new Vector(); v.add("20"); v.add("40"); v.add("60"); v.add("80"); v.add("100");Now, convert the above Vector to List −ListmyList = new ArrayList(v);ExampleFollowing is the program to convert a Vector to List in Java −import java.util.*; public class Demo { public static void main(String[] args) { Vector v = new Vector(); v.add("20"); v.add("40"); v.add("60"); v.add("80"); v.add("100"); v.add("120"); v.add("140"); v.add("160"); v.add("200"); ...
Read MoreProgram to convert a Set to Stream in Java using Generics
Let’s say the following is our Set −Set set = new HashSet(Arrays.asList(15, 40, 60, 90, 120, 150, 200));Now, create a method to convert the above set to stream.StreamstreamOfInteger = convertSet(set);The method −private static Stream convertSet(Set set) { return set.stream(); }ExampleFollowing is the program to convert a Set to Stream in Java using Generics −import java.util.*; import java.util.stream.*; import java.util.function.*; public class Demo { private static Stream convertSet(Set set) { return set.stream(); } public static void main(String args[]) { Set set = new HashSet(Arrays.asList(15, 40, 60, 90, 120, 150, ...
Read More