java 平面上最近两个点之间的距离

public class ClosestPair{

public static void main(String[] args) {

float[][] a = new float[][]{{3, 3}, {1, 5}, {4, 6}, {2, 8}, {9, 9},{2, 1}, {7, 2}, {6, 5}, {9, 4}, {5, 9}};

float d = (float) 1e9;

for(int i=0; i<10; i++){

for(int j=i+1; j<10; j++){

float dx = a[i][0] - a[j][0];

float dy = a[i][1] - a[j][1];

d = min(d, Math.sqrt(dx*dx+dy*dy));

}

}

System.out.println(d);

}

private static float min(float d, double sqrt) {

return d = d>sqrt?d=(float) sqrt:d;

}

}