Java get element from list of list

Question

I have a list like this :

List<List<String>> myList = new ArrayList<List<String>>();

that I fill with other lists :

List<String> lst = new ArrayList<String>();
String val1;
String val2; 
val1 = "java";
val2 = "c++";
lst.add(val1);
lst.add(val2);
myList.add(lst);

List<String> lst2 = new ArrayList<String>();
val1 = "pizza";
val2 = "fruit";
lst.add(val1);
lst.add(val2);
myList.add(lst);

I want to get the elements of the list by giving index something like :

String valeur = myList[0].val1 ;
String valeur2 = myList[1].val2 ;

which of course is a wrong way; I don't know how to do this; I read something about closures but I don't know what is it .. any help will be apprecdiated , and I hope my question is clear don't hesitate to correct or ask me if something is wrong.

Thank you.

myList.get(0).get(0);. If you want to access the values by name, then you will need to use a Map. See Collections Trail for more details — MadProgrammer
– MadProgrammer, Commented Dec 13, 2015 at 23:28
@MadProgrammer really a quick answer , I'm going to try this now. — cbInfo009
– cbInfo009, Commented Dec 13, 2015 at 23:29
I see there is already an answer. But replace also the declaration with: List<List<String>> myList = new ArrayList<>(); — LowLevel
– LowLevel, Commented Dec 13, 2015 at 23:31
@LowLevel While I don't disagree, it won't make a difference to the OP's problem, but will mean they can type less, so you might use "You can also use...", just in case the OP sees it as a requirement to solve there problem ;) — MadProgrammer
– MadProgrammer, Commented Dec 13, 2015 at 23:34
@LowLevel please explain to me why this declaration is more good than what I did . If you don't mind — cbInfo009
– cbInfo009, Commented Dec 13, 2015 at 23:35

Yassin Hajaj · Accepted Answer · 2015-12-13 23:28:54Z

4

Use List#get()

Returns the element at the specified position in this list.

String valeur = myList.get(index).get(index);

answered Dec 13, 2015 at 23:28

Yassin Hajaj

22.1k10 gold badges60 silver badges93 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sanskruti Nashikkar · Accepted Answer · 2022-05-27 17:21:12Z

0

try this String valeur = myList.get(0).get(0)

answered May 27, 2022 at 17:21

Sanskruti Nashikkar

1

1 Comment

Franck Over a year ago

How does this answer improve the other answer (stackoverflow.com/a/34257681/18980756)?

Collectives™ on Stack Overflow

Java get element from list of list

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related