How to get same index value from other array?

Question

I have two arrays and i want to access data of same index value from other array.

Two Array list :

ArrayList<Integer> Position = new ArrayList<Integer>();
ArrayList<String> List_Data = new ArrayList<String>();

Now my Position array contains Integer value like index of data i.e 0,3,5 out of 10 Records. i want to get only those string whose index should be i.e 0,3,5 out of 10 .

Example :

String Array >> [A,B,C,D,E,F,G,H,J,K]; 

Index >> Now i am selecting 2 ,5 index data.

Final Output as string >> C,F

So at the end i get actual string from array.

I get this and some other link also but not get exact idea how to do this.

Please anyone help me.

Why not try to fix your problems with using more suitable Collections such as Maps or simply ArrayList<Integer, String> — Stefan de Bruijn
– Stefan de Bruijn, Commented Mar 4, 2013 at 13:21
there are some other things with same operation. so its simply that get data according index — Chintan Khetiya
– Chintan Khetiya, Commented Mar 4, 2013 at 13:22
Your given example and linked image don't do the same thing. Which are you trying to do? — Geobits
– Geobits, Commented Mar 4, 2013 at 13:24

Lisa Anne · Accepted Answer · 2013-03-04 13:14:40Z

2

Try this, If I understand what you want correctly (otherwise let me know)

String sr=Lista_Data.get(Position.get(INDEX YOU NEED; EG 1, 5, 1000...))

answered Mar 4, 2013 at 13:14

Lisa Anne

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3 Comments

Chintan Khetiya Over a year ago

get(Position.get(INDEX YOU NEED; EG 1, 5, 1000...)) here , what is Position ?

Lisa Anne Over a year ago

Position is your ArrayList that you called Position.

Chintan Khetiya Over a year ago

this operation i am doing inside button's click event. so get only list.get(int)

BobTheBuilder · Accepted Answer · 2013-03-04 13:18:53Z

1

You can get object from ArrayList using get function. Then you can use it as an index to another ArrayList.

String res = "";
for (Integer pos : Position) {
    res += List_Data.get(Position.get(pos));
}

answered Mar 4, 2013 at 13:18

BobTheBuilder

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3 Comments

Chintan Khetiya Over a year ago

i am not able to get Position in get(int index) ;

BobTheBuilder Over a year ago

You first need to populate those arrays

BobTheBuilder Over a year ago

What do you mean? you dont have Position ArrayList?

Andremoniy · Accepted Answer · 2013-03-04 13:30:59Z

1

The only thing you need is method indexOf(...) of List.

public String getStringByIndex(Integer index) {
    return List_Data.get(Position.indexOf(index));
}

answered Mar 4, 2013 at 13:30

Andremoniy

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1 Comment

Chintan Khetiya Over a year ago

i tried by this way spinner_Data.indexOf(posSel.get(i)); but force close

Chintan Khetiya · Accepted Answer · 2013-03-04 14:39:01Z

0

I am not not saying that above code is wrong but its not working according my needs. or i can't handle because of my other code limitation.

Finally, I get as i want like :

for (int i = 0; i < Poisition.size(); i++)
{

 System.out.println("Selected Data --->"+ List_Data.get(Poisition.get(i)));

}

answered Mar 4, 2013 at 14:39

Chintan Khetiya

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