Question

Sorry I suspect the answer is easy but I’m getting annoyed at the way I’m currently doing this and was trying to find another way(old python habits, sorry).
I basically want to create a list of list(list has two integers) so for example it looks like this [[0,0], [0,1],[1,2]] and so on.

Right now the two ways I have been doing it(which I don’t think is right) is the tutorial way of:

list1.add(data);
list1.add(more_data);
final_list_of_list.add(list1);

I did some digging to find another way because I’m lazy and want to do this in one shot, so I found a command that fit my needs(in terms of getting data in)

List final_list_of_list = new ArrayList();
final_list_of_list.add(new Point(0, 0)); //and so on..

The problem with point is when I look at my beautiful data I see the ugliness of this:

[java.awt.Point[x=970,y=10], java.awt.Point[x=65,y=10], java.awt.Point[x=729,y=10]

Surely there is a easier way to add the data and still have it look nice(like the format above in my example)?

Answer 1

You could subclass Point or create your own implementation and override the toString() method to print something prettier. I think that would be easier than trying to work with lists of lists.

Perhaps something like this:

public class MyPoint {
    public final int x;
    public final int y;

    public MyPoint(int x, int y) {
        this.x = x;
        this.y = y;
    }

    @Override
    public String toString() {
        return "[" + x + "," + y + "]";
    }
}