-4
My java code:
for (Construtor usuario: users){
Construtor USER = new Construtor(user.getNomeUsuario);
arrayList.add(USER);
}
** How do I get the position of the loop in this configuration above? See that the old way is easier because:
for(int i = 0; i < users.size(); i++){
Toast......"Posição" + i.......Show();
}
** It’s easier the old-fashioned way, but I want to know how you do it the other way.
1
Hello yes there is a way to get position and value.
Take an example:
public class MyClass {
public static void main(String args[]) {
int index = 0;
int[] abc = {2,5};
for (int ho : abc) {
System.out.println(ho+" is from index: "+index);
index += 1;
}
index = undefined;
}
}
Console:
2 is from index: 0
5 is from index: 1
And in the second method give value and position.
Take an example:
public class MyClass {
public static void main(String args[]) {
int[] abc = {2,5};
for (int i = 0;i<abc.length;i++) {
int value = abc[i];
System.out.println(value+" is from index: "+i);
}
}
}
Console:
2 is from index: 0
5 is from index: 1
kkkkkk sorry to have made you take the trouble of answering.... I thank you very much for your explanation
See in the edition.... in my Mainactivity which had these loops "for".... I think the error was there.... but I saw that not...
Okay, fine. Which line of code has errors?
Well I don’t know..... The intention is to expand the listview showing the Childs, but when I click on the group nothing happens.... I looked for mistakes, but nothing I find.....
Which editor to use?
I did not understand this last question, but if you are talking about programming language is java and if the platform is Android Studio.....
If you want I can send you the . Apk for you take a look along with the source code....
Android Studio has console?
No need to order. You have already sent the code in the reply .
All in then..... but if you want to see the point apk I send you
0
In Java, there is no native construction to get the Iterable index. Some languages allow this. For example, in PHP:
foreach ($items as $key => $value) { ... }
However, to do the same in Java, you will have to control the index for own account. Example:
int index = 0;
for(Construtor usuario: users) {
System.out.println("Index atual: " + (index++));
}
Another alternative, as you put it, is to use the default form of for (without iteration of Iterable):
for(int i = 0; i < users.length; i++) {
System.out.println("Index atual: " + i);
}
Thanks friend..... You really understood the question and gave a great answer.
Browser other questions tagged java android loop for
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