Making 100 ArrayList's

Programming Questions

brokenbeep

in Programming Questions • 1 years ago

I want to make 100 ArrayLists, why doesn't this work?!

for (int i = 0; i < 100; i = i+1) {

ArrayList myArrayList(i) = new ArrayList();

}

I keep getting error messages, can't work out why this won't work! Any help would be greatly appreciated. :)

Replies(3)

greg.b

1 years ago

myArrayLists(0) is not a valid variable name. Make an array of arrayLists instead. If I remember correctly, it would go something like

ArrayList[] myArrayList = new ArrayList[100];

for (int i = 0; i < 100; i = i+1) {

//make sure to wrap i in [square brackets] as it is an array

ArrayList myArrayList[i] = new ArrayList();

}

amnon.owed

1 years ago

Assuming you want an array of 100 ArrayLists, you can do it like this:

If instead you want an ArrayList of ArrayLists, you can do it like this:

brokenbeep

1 years ago

Fantastic! Thank you both very much indeed, you have literally sorted out a project that has been bugging me for over a month!

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