0149 Max Points on a Line

Question

My Solution:

class Solution {
    public int maxPoints(int[][] points) {
        int maxPoints = 0;
        if(points.length <= 2){
            return points.length;
        }

        for(int i = 0; i < points.length; i++){
            Map<Double, Integer> map = new HashMap<>();
            for(int j = 0; j < points.length; j++){
                if(i==j){
                    continue;
                }

                int x1 = points[i][0];
                int y1 = points[i][1];

                int x2 = points[j][0];
                int y2 = points[j][1];

                double k = (double)(y2 - y1) / (double)(x2 - x1);
                map.put(k, map.getOrDefault(k,1) + 1);
                maxPoints = Math.max(maxPoints, map.get(k));
            }
        }

        return maxPoints;
    }
}