CODEWITHSUNDEEP
javaarraysstringlist
Bogdan S
Bogdan S

Reputation: 229

Java - Use specific element of a list

My function return a List of string array. how i access/print only the first string array from the list in main().

public class URLReader{
public  List<String[]> functie(String x) throws Exception{
...
List<String[]> substrList = new ArrayList<String[]>();
substrList.add(tds2);
substrList.add(tds3);
return substrList;
}
public static void main(String[] args) throws Exception {
URLReader s = new URLReader();
for (??????????)

Upvotes: 0

Views: 500

Answers (3)

ty1824
ty1824

Reputation: 1200

As other answers have stated already, to use the first element in a list, you would call the List.get(int) method.

someList.get(0);

In your code, in order to iterate over the String array in the first list index, you would want something that looks like:

for( String str : s.functie(arg).get(0) ) {
    //Do something with the string such as...
    System.out.println(str);
}

Upvotes: 0

hoipolloi
hoipolloi

Reputation: 8044

You can get the first element from a list like so:

final List<String[]> arrayList = new ArrayList<String[]>();
arrayList.get(0); // get first element

Or you can use a queue, which has built in methods for such tasks.

final Queue<String[]> linkedList = new LinkedList<String[]>();
linkedList.poll(); // get (and remove) first element
linkedList.peek(); // get (but do not remove) first element

Upvotes: 0

dacwe
dacwe

Reputation: 43504

If you want to iterate over all arrays (what you started writing in your question:

for (String[] array : s.functie("...")) {
     ...
}

If you only want the first one:

String[] array = array.get(0);

Upvotes: 2

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