In this example, we have a list of integers that we want to sort in ascending order. We use theCollections.sort()method to sort the list, and then print the sorted list to the console. The output shows the list sorted in ascending order. This is a basic way to sort a list in Jav...
// Declares String reference variable str1 and str2 String str1; String str2; // Assigns the reference of a String object "Hello" to str1 str1 = new String( "Hello World !!" ); // Assigns the reference stored in str1 to str2 str2 = str1; System.out.println( str1 ); //Hel...
The most common method to print the List in Java is using a “for” loop. The for loop iterates over the list until its size and prints out the values using the “System.out.println()” method. Example In this example we consider the same list named “gadgetList” and print its valu...
Let’s look at a quick example to sort a list of strings.package com.journaldev.sort; import java.util.ArrayList; import java.util.Collections; import java.util.List; public class JavaListSort { /** * This class shows how to sort ArrayList in java * @param args */ public static void ...
In the next example we filter a list of user objects. Main.java import java.util.ArrayList; import java.util.List; void main() { var p1 = new User("Michael", 23, Gender.MALE); var p2 = new User("Jane", 24, Gender.FEMALE); var p3 = new User("John", 44, Gender.MALE); var...
These types of Lists do not have a specific data type and can hold any type of objects and values in it. Let us try creating these in Java and adding some values to it. import java.util.*; public class myClass { public static void main(String args[]) { // ArrayList List myArrayLi...
We can use thesort()function from theCollectionsClass to sort a list. We can take the list object, and it modifies the order of the elements. It sorts the list in ascending order. For example, importjava.util.*;importjava.util.stream.*;publicclassMain{publicstaticvoidmain(String[]args){...
In Java 9 and later, you can useList.of()to create an immutable list and then pass it to theArrayListconstructor if you need a mutable list. importjava.util.ArrayList; importjava.util.List; publicclassArrayListExample{ publicstaticvoidmain(String[]args){ ...
// Click on a close button to hide the current list item varclose = document.getElementsByClassName("close"); vari; for(i =0; i < close.length; i++) { close[i].onclick=function() { vardiv =this.parentElement; div.style.display="none"; ...
Flattening a nested list may seem hard at the beginning, but it's not. It can be easily done using only plain Java, streams, or external libraries.