Knn algorithm in java

Question

How i can input 3 vectors and another vector to calculate distance and print vector with k=2

Answer 1

Because i need solution for my exam

Answer 2

I have no idea how i solove my problem

Answer 3

for input use

int[][] vectors = new int[numberOfVectors][2];

for (int i=0; i < numberOfVectors; i++) {
vectors[i][0] = sc.nextInt();
vectors[i][1] = sc.nextInt();
}

System.out.println( Arrays.deepToString( vectors) );

or use a Point class