Sorting ArrayList of Points

I am using an arraylist of points. I need to sort it by the manhattan distance I found. I have been trying for days. Need major help.
The program prints :
[0] (25,-60) 85
[1] (59,-100) 159
[2] (-53,69) 122.
I need to Sort it by the values on the right- 122,150, 85.
So far i have:

public static void main(String[] args) throws Exception 
	{
		ArrayList<Point> points = new ArrayList<Point>();
		points = readPointsFromFile("points.txt");
		showAllPoints(points);
	}

	public static ArrayList<Point> readPointsFromFile(String fileName)throws IOException
	{
		ArrayList<Point> points = new ArrayList<Point>();
		
		File file = new File(fileName);
		Scanner input = new Scanner(file);
		while(input.hasNext())
		{
			points.add(new Point(input.nextInt(),input.nextInt()));
		}
		
		return points;
	}
	
	public static int cabDistance(Point point)
	{
		
		int x = Math.abs(point.x);
		int y = Math.abs(point.y);
		int sum = x + y;
		System.out.println(sum);
		return sum;
		public static void bubbleSort(ArrayList<Point> list)
	{
    boolean swapped = true;
    while (swapped)
    {
        swapped = false;
        for (int a = 0; a < list.size()-1; a++) 
        {
            if (list.get(a)(list.get(a+1)) > 0)
            {
            	Item temp = list.get(a);
            	list.set(a, list.get(a+1));
            	list.set((a+1), temp);
                swapped = true;           	
          }
        }
    } 
}
}
	}