We might need to create aHashSetfrom a specifiedArrayListwhen we want toremove duplicates from the listbecause sets do not allow duplicate items. Let us begin with creating aListinstance, and then we will conver
add("Amy"); hashSet.add("Ryan"); hashSet.add("Jamie"); Now, convert the HashSet to TreeSet ? Set<String> set = new TreeSet<String>(hashSet); Example Below is an example to convert a HashSet to a TreeSet in Java ? Open Compiler import java.util.HashSet; import java.util.Set...
Likewise, we canconvert Map keys to Listusing plain Java and Streams. List<String>keyList=newArrayList<>(map.keySet());//ArrayList ConstructorList<String>listOfKeys=map.keySet().stream().collect(Collectors.toCollection(ArrayList::new));//Streams 3. ConvertMaptoSet We can use theHashSetconstruc...
import java.util.List; import java.util.Map; import java.util.Set; public class helloWorld { public static void main(String[] args) { Map map = new HashMap(); Map mapcopy = new HashMap(); map.put(1,2);//插入映射 map.put(2, 4); map.put(9, 10); map.get(1);//根据key,获...
To convert an array to an ArrayList - Open Compiler import java.util.ArrayList; import java.util.Arrays; import java.util.Iterator; import java.util.List; public class ArrayToArrayList { public static void main(String args[]) { String stringArray[] = { "JavaFX", "Java", "WebGL", "...
The first two methods that are used here ("SortedSet"and"TreeSet") are used to sort immutable sets in Scala and take set as input and return the sorted set. The last method isSortedSetworking over mutable sets too and take the list conversion of the set to sort. ...
Example to Convert Java Set to String importscala.jdk.CollectionConverters._objectmyObject{defmain(args:Array[String]):Unit={valjavaSet=newjava.util.HashSet[Int]()javaSet.add(4535)javaSet.add(2003)javaSet.add(111)valscalaString=javaSet.toString println("The string conversion of java set is ...
Convert File to byte array and Vice-Versa Kotlin Type Conversion Convert Array to Set (HashSet) and Vice-Versa Convert OutputStream to String Convert Character to String and Vice-Versa Convert List (ArrayList) to Array and Vice-Versa Kotlin...
Fast file hash? Faster Deep Cloning Faster way to get folder size? Faster way to Read XML in C#.Net Fastest method to convert bitmap object to byte array Fastest way to do string comparisons? Hashset.Contains? Fastest way to iterate through an IEnumerable<T> Fastest way to read a huge ...
// Java program to convert a HashSet // into an array import java.util.*; public class Main { public static void main(String[] args) { HashSet < Integer > nums = new HashSet(); nums.add(1); nums.add(2); nums.add(3); nums.add(4); nums.add(5); nums.add(6); Object ...