I want to create vector array like this in c++ in Java
vector<int> tab_u[255]
I don't have idea how to fast create. I try this:
List<Integer> tab[] = new List[255];
but i cant add something
i want something like this
[0] = {1,2,2,3}
[1] = {2,3}
[2] = {1}
you can defined as;
Vector<Integer> vector = new Vector();
but as you may read here: vectors are kind of old...
Vector is an obsolete Collection
and maybe you should consider using another collection like an ArrayList
Try this:
ArrayList<String> cars = new ArrayList<String>();
cars.add("Volvo");
cars.add("BMW");
cars.add("Ford");
cars.add("Mazda");
System.out.println(cars);
I dont remember vectors in java but this is very similar. Hope it helps.
interface and a special implementation of it, you could have written List<String> cars = new ArrayList<>();
You need to do some additional work, because array initialization and array element initialization are separated.
List<Integer> myIntegerVectors = new List[255]; // Array initialized
for(int i = 0;i < myIntegerVectors.length; i++) // Elements initialized in loop
myIntegerVectors[i] = new ArrayList<>();
myIntegerVectors[7].add(1337);
