Question

Design a class named MyPoint to represent a point with x- and y-coordinates. The class should contain:

Two data fields x and y that represent the coordinates.

A no-arg constructor that creates a point at (0, 0).

A constructor that creates a point with specified coordinates.

Get methods for data fields x and y respectively.

A method named distance that returns the distance from this point to another point with specified x- and y-coordinates. Use the formula: root (x2-x1)2 + (y2-y1)2

Answer 1

public class MyPoint {
    private double x, y;

    public MyPoint() {
        this.x = 0;
        this.y = 0;
    }

    public MyPoint(double x, double y) {
        this.x = x;
        this.y = y;
    }

    public double getX() {
        return x;
    }

    public double getY() {
        return y;
    }

    public double distance(MyPoint point) {
        return Math.sqrt(Math.pow(x - point.x, 2) + Math.pow(y - point.y, 2));
    }

    @Override
    public String toString() {
        return "(" + x + ", " + y + ")";
    }
}

class PointTest {

    public static void main(String[] args) {
        MyPoint first = new MyPoint();
        MyPoint second = new MyPoint(10, 30.5);
        System.out.printf("The distance between " + first + " and " + second + " is %.2f\n", first.distance(second));
    }
}