list in java

1import java.util.ArrayList;
2import java.util.Collections;
3import java.util.List;
4import java.util.ListIterator;
5public class Main {
6   public static void main(String[] args) {
7      List<String> list = new ArrayList<String>();
8      list.add("a");
9      list.add("b");
10      list.add("c");
11      list.add("d");
12      list.add("e");
13      list.add("f");
14      
15      //On met la liste dans le désordre
16      Collections.shuffle(list);
17      System.out.println(list);
18      
19      //On la remet dans l'ordre
20      Collections.sort(list);
21      System.out.println(list);
22      
23      Collections.rotate(list, -1);
24      System.out.println(list);
25      
26      //On récupère une sous-liste
27      List<String> sub = list.subList(2, 5);
28      System.out.println(sub);
29      Collections.reverse(sub);
30      System.out.println(sub);
31      
32      //On récupère un ListIterator
33      ListIterator<String> it = list.listIterator();
34      while(it.hasNext()){
35         String str = it.next();
36         if(str.equals("d"))
37            it.set("z");
38      }
39      while(it.hasPrevious())
40         System.out.print(it.previous());
41      
42   }
43}
44

1//Creating arraylist example 
2ArrayList<String> list = new ArrayList<String>();  
3 
4//Adding objects in arraylist 
5list.add("Mango");    
6list.add("Banana");   
7
8//Change the element (index,"new value")
9list.set(1,"Dates"); 
10
11//Return the 2nd element, because index starts from 0
12System.out.println("Returning element: " + list.get(1)); 

1import java.util.*;
2var list = new ArrayList<String>();
3list.add("Hello World!");