Extract an array in an nested array Java

Question

I have the following code:

DataPoint dbPoint[] = new DataPoint[] {
                new DataPoint(0, 1),
                new DataPoint(1, 5),
                new DataPoint(2, 3),
                new DataPoint(3, 2),
                new DataPoint(4, 6)
        };

And I wish to remove new DataPoint(x, y) value inside, so I can do something like:

DataPoint dbPoint[] = new DataPoint[] {};
dbPoint[].add(new Data(1,1);
dbPoint[].add(new Data(2,5);
dbPoint[].add(new Data(3,7);
dbPoint[].add(new Data(4,3);
dbPoint[].add(new Data(5,9);

Thanks!

`DataPoint dbPoint[] = new DataPoint[]{};`? – Mauker Feb 23 '16 at 18:22 — Mauker, Feb 23 '16 at 18:22

score 1 · Accepted Answer · answered Feb 23 '16 at 18:46

Build a List and convert to array using toArray().
Remember, arrays cannot be resized, but collections like List can.

ArrayList<DataPoint> points = new ArrayList<>();
points.add(new DataPoint(0, 1));
points.add(new DataPoint(1, 5));
points.add(new DataPoint(2, 3));
points.add(new DataPoint(3, 2));
points.add(new DataPoint(4, 6));
DataPoint[] dbPoint = points.toArray(new DataPoint[points.size()]);

LineGraphSeries<DataPoint> series = new LineGraphSeries<>(dbPoint);

Extract an array in an nested array Java

1 Answers1