Java, converting epoch to milliseconds

Question

My flot graph is not displaying any lines, problem multiplying epoch by 1000 using Integer in Java?
This is my raw data, stored in a .txt file

epoch,value
1383229104,55559
1383229121,55559
1383229787,55565

which is parsed by a Servlet and stored inside:

Vector<Integer> points = new Vector<Integer>();

e.g

points.add(Integer.parseInt(strLine.split(",")[0]) * 1000);
points.add(Integer.parseInt(strLine.split(",")[1]));

There are multiple files, each one containing a separate series (line) to be plotted on graph.
For each Vector<Integer> points object, they are added to ..

Vector<Dataset> datasets = new Vector<Dataset>();

Dataset has following definition:

public class Dataset {

    private String name;
    private Vector<Vector<Integer>> points;

Once all the files have been parsed and added to Vector<Dataset> datasets, this object is sent client side using response.getWriter().write(new Gson().toJson(datasets));
And 'graphed' using

var datasets = JSON.parse(xmlhttp.responseText);

    var plotarea = $("#placeholder");
    $.plot(plotarea, [datasets[0].points, datasets[1].points, datasets[2].points, datasets[3].points, datasets[4].points], {
        xaxis: {
            mode: "time",
            min: (new Date(2012, 0, 1)).getTime(),
            max: (new Date(2015, 0, 1)).getTime()
        }
    });

Update: --------------------------------------------------------------------------
Debugging output within javascript.
There are 5 files being loaded into Vector<Dataset> datasets = new Vector<Dataset>();

alert(datasets) .. [object Object],[object Object],[object Object],[object Object],[object Object]
console.log(datasets) .. [object Array]

I can access values using:

alert(datasets[0].points[0][0]);
alert(datasets[0].points[0][1]);

Output will be two alert dialogs, one containing 249634688, the second 55559
Note: 1383229104 * 1000 should not be 249634688

Answer 1

Changing private Vector<Vector<Integer>> points; to private Vector<Vector<Long>> points;
Caused expected result i.e 1383229104000

Answer 2

You should be using Long, not Integer. Clearly this is an overflow problem.