initialize new Objects with the Strings out of an String Array [duplicate]

Question

I want to create an Arrayof Strings storing "names"; and these names should be used to create new ArrayLists named by the Strings in the Array.

It doesn't work this way. Is there a way to manage this or can you please explain why isn't that possible?

public String combiTop [] = {"1er","2er","3er","4er","5er","6er"};

topRowValue = new ArrayList<>();
        for (int i = 0; i < combiTop.length; i++) {
            ArrayList<Integer> combiTop[i] = new ArrayList<>();
            for (int j = 0; j < 6; j++) {
                combiTop[i].add(-1);
            }
            topRowValue.add(combiTop[i]);
        }

I'm not sure what's being asked here, do you just want to convert the array to a list? — pablochan
– pablochan, Commented May 26, 2016 at 21:36
i want to use Strings in the Array combiTop , to create new Objects(ArrayLists) with these names . — MaT
– MaT, Commented May 26, 2016 at 21:39
I still don't understand, can you give an example of the desired result? — pablochan
– pablochan, Commented May 26, 2016 at 21:40
private String Names[] ={"max","tom","paul"}; ArrayList<Integer> Names[1] = new ArrayList<>(); // it should create an new ArraList<Integer> tom — MaT
– MaT, Commented May 26, 2016 at 21:41
You can not define variables with dynamic variable names though, which seems to be what you're trying to do here. — Jorn Vernee
– Jorn Vernee, Commented May 26, 2016 at 21:46

Nissa · Accepted Answer · 2016-05-26 21:50:45Z

0

In Java, variables in the same function are of fixed type, so you can't assign an ArrayList value to a String array, or the values inside of it. Thus:

String combiTop; //you don't have to assign values in your demonstration

ArrayList<String> = new ArrayList<String>(combiTop.length);
for (String s : combiTop) { // this iterates through each value in the array
    topRowValue.add(s);
}

answered May 26, 2016 at 21:50

Nissa

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