Java nima Java dasturlash tili

Ekranda:

101 Zafar 23
102 Aziz 21
103 Jalol 25

addAll() funksiyasi yani ikkita listni bir biri bilan qo’shishga doir misol:

1. 
   import java.util.*;
   
2. 
   class TestCollection4{
   
3. 
    public static void main(String args[]){
   
4. 
   
   
5. 
   ArrayList al=new ArrayList();
   
6. 
   al.add("Aziz");
   
7. 
   al.add("Zafar");
   
8. 
   al.add("Jalol");
   
9. 
   
   
10. 
    ArrayList al2=new ArrayList();
    
11. 
    al2.add("Fayzullo");
    
12. 
    al2.add("Jamshid");
    
13. 
    
    
14. 
    al.addAll(al2);
    
15. 
    Iterator itr=al.iterator();
    
16. 
    while(itr.hasNext()){
    
17. 
    System.out.println(itr.next());
    
18. 
    }
    
19. 
     }
    
20. 
    } 
    
21. 
    Ekranda :
    

Aziz
Zafar
Jalol
Fayzullo
Jamshid


Massivni ArrayListga qo’shish ga doir bazi usullarni

import java.util.*;

public class ArrayToArrayList {

public static void main(String[] args) {

/* Array Declaration and initialization*/

String citynames[]={"Andijon", "Namangan", "Farg’ona", "Qo’qon"};

/*Array to ArrayList conversion*/

ArrayList citylist= new ArrayList(Arrays.asList(citynames));

/*Adding new elements to the converted List*/

citylist.add("Pop");
citylist.add("Chust");

/*Final ArrayList content display using for*/

for (String str: citylist)
{
System.out.println(str);
}
}
}
Ekranda:
Andijon
Namangan
Farg’ona
Qo’qon
Pop
Chust

Collections.addAll method didan foydalanib massivni Arraylistag qo’shish

import java.util.*;

public class Example2 {

public static void main(String[] args) {

/* Array Declaration and initialization*/

String array[]={"Hi", "Hello", "Howdy", "Bye"};

/*ArrayList declaration*/

ArrayList arraylist= new ArrayList();

/*Conversion*/

Collections.addAll(arraylist, array);

/*Adding new elements to the converted List*/

arraylist.add("String1");
arraylist.add("String2");

/*Display array list*/

for (String str: arraylist)
{
System.out.println(str);
}
}
}
Ekranda:
Hi
Hello
Howdy
Bye
String1
String2