ArrayList<String> list = new ArrayList<String>(); // Add strings to the ArrayList. list.add("Python"); list.add("Java"); list.add("PHP"); list.add("C#"); list.add("C++"); list.add("Perl"); // Create a new string array with the same size as the ArrayList. String[] my_a...
方法:String [] strArray = list.toArray(new String[list.size()]); 方法: List<String> strsToList1= Arrays.asList(arry); List<String> listA = new ArrayList<String>(strsToList1); import java.util.ArrayList; import java.util.Arrays; import java.util.List; public class Test12 { public s...
.convertListBeforeJava8(list); assertThat( map.values(), containsInAnyOrder(list.toArray())); }Copy 4. With Java 8 Starting with Java 8, we can convert aListinto aMapusing streams andCollectors: publicMap<Integer, Animal>convertListAfterJava8(List<Animal> list){ Map<Integer, Animal> map...
java import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; public class Main { public static void main(String[] args) { String[] stringArray = {"apple", "banana", "cherry"}; List<String> stringList = Arrays.stream(stringArray).collect(Collectors.toL...
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 Stream APIs. Happy Learning!!
package com.mkyong.array; import java.util.ArrayList; import java.util.List; public class ArrayExample1 { public static void main(String[] args) { int[] number = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; List<Integer> list = convertIntArrayToList(number); ...
Java ArrayListExample 1: Convert Map to List import java.util.*; public class MapList { public static void main(String[] args) { Map<Integer, String> map = new HashMap<>(); map.put(1, "a"); map.put(2, "b"); map.put(3, "c"); map.put(4, "d"); map.put(5, "e");...
ExampleGet your own Java Server Convert a string to achararray: // Create a stringStringmyStr="Hello";// Convert the string to a char arraychar[]myArray=myStr.toCharArray();// Print the first element of the arraySystem.out.println(myArray[0]); ...
2. Using Core Java The following examples use the core Java APIs for converting the primitive array toListand do not require extra dependencies in the project. 2.1. Using Streams In Java, we can represent thestream of primitivesusing theIntStream,LongStream,FloatStream,DoubleStreamclasses for cor...
convert json array to java list last updated: march 7, 2025 baeldung pro – npi ea (cat = baeldung) baeldung pro comes with both absolutely no-ads as well as finally with dark mode , for a clean learning experience: >> explore a clean baeldung once the early-adopter seats are all ...