Question: how to calculate distance between two cities in java?
Answer: import java. lang. Math. *;
class DistanceBwPoint.
public static void main(String arg[])
{
int x1,x2,y1,y2;
double dis;
x1=1;y1=1;x2=4;y2=4;
dis=Math. sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1));