< Subject Test
import java. util. concurrent.*;
public class Main (

public static void main(String[] args)
ConcurrentHashMap chm = new ConcurrentHashMap ();
chm. put(1, "Welcome");
chm. put(2, "to");
chm. put(3, "Java");
chm. put (4, "World");
chm. putIfAbsent (3, "World");
System. out. println("Elements: "+ chm);
chm. remove (2, "Welcome");
System. out. println("Elements after key 2 is removed: "+chm);
chm. putIfAbsent (3, "Java's");
System. out. println("Add new:,"+chm);
chm. replace(3, "Java", "Java New");
System. out. println("After Replacing: "+ chm);

Kto rozmawia z clamentain przez krótkofalówke w the walking dead która śledzi lee w 4 epizodzie

Least square fit to polynomial write a function leastsquarefit3pol that solves a linear system of equations to find a least squares fit of a third order polynomial to an experimental data set given as two row arrays. the function leastsquarefit3pol must explicitly solve a set of linear equations and cannot use polyfit. there should be no restriction on the size of the problem that can be solved.

Write a method that takes in an array of point2d objects, and then analyzes the dataset to find points that are close together. be sure to review the point2d api. in your method, if the distance between any pair of points is less than 10, display the distance and the (x,y)s of each point. for example, "the distance between (3,5) and (8,9) is 6.40312." the complete api for the point2d adt may be viewed at ~pf/sedgewick-wayne/algs4/documentation/point2d.html (links to an external site.)links to an external site.. try to write your program directly from the api - do not review the adt's source code.