// 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
The following code shows how to convert a set to an array. Example /*fromwww.java2s.com*/importjava.util.Arrays;importjava.util.Iterator;importjava.util.Set;importjava.util.TreeSet;publicclassMain {publicstaticvoidmain(String[] argv) { Set<String> set =newTreeSet<String>(); set.add("b...
TheMap.keySet()returns aSetview of all the keys in theMap. Set<String>keySet=map.keySet(); 4. Conclusion This tutorial taught us how to convert Java Map keys and values into an Array, List or Set with simple examples. We learned to use theArrayListandHashSetconstructors as well as Str...
add("Katie"); hashSet.add("Brad"); hashSet.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...
Example 1: Convert Byte Array to Hex value fun main(args: Array<String>) { val bytes = byteArrayOf(10, 2, 15, 11) for (b in bytes) { val st = String.format("%02X", b) print(st) } } When you run the program, the output will be: 0A020F0B In the above program, we have...
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); ...
import java.util.ArrayList; import java.util.Iterator; public class ArrayToArrayList { public static void main(String args[]) { String stringArray[] = {"JavaFX", "Java", "WebGL", "OpenCV", "OpenNLP", "JOGL", "Hadoop", "HBase", "Flume", "Mahout", "Impala"}; ArrayList<String> ...
Convert a Set to a SortedSet To convert a set into sortedSet, there are multiple methods, objectMyClass{defmain(args:Array[String]):Unit={valset=Set(2,56,577,12,46,9,90,19);println("The set is : "+set)valsortedSet=collection.immutable.SortedSet[Int]()++set println("The sorted se...
values) { if (ArrayUtil.isEmpty(values)) { return new Integer[] {}; } final Integer[] ints = new Integer[values.length]; for (int i = 0; i < values.length; i++) { final Integer v = toInt(values[i], null); if (null == v && isIgnoreConvertError == false) { throw new...
Similar to the previous section, we can convert a set to list using theStreamas follows: Set<Integer>set=list.stream().collect(Collectors.toSet());Assertions.assertEquals(4,set.size()); Happy Learning !! Read More:ArrayList Java DocsandHashSet Java Docs...