Question

Design a class named MyPoint to represent a point with x and y-coordinates. The class contains: Two data fields x and y that represent the coordinates. . A no-arg constructor that creates a point (0, 0) .A constructor that constructs a point with specified coordinates. Two get functions for data fields x and y, respectively. A function named distance that returns the distance from this point to another point of the MyPoint type Write a test program that creates two points (0, 0) and (10, 30.5) and displays the distance between them.

Answer 1

class MyPoint {
    // The data fields x and y that represent the coordinates with getter methods.
    private double x, y;

    // A no-arg constructor that creates a point (0,0)
    public MyPoint() {
        this.x = 0;
        this.y = 0;
    }

    // A constructor that constructs a point with specified coordinates.
    public MyPoint(double x, double y) {
        this.x = x;
        this.y = y;
    }

    // getter methods.
    public double getX() {
        return x;
    }

    public double getY() {
        return y;
    }

    // A method named distance that returns the distance from this point to a specified point of the MyPoint type.
    public double distance(MyPoint point) {
        return Math.sqrt(Math.pow(x-point.x, 2) + Math.pow(y-point.y, 2));
    }

    // A method named distance that returns the distance from this point to another point with specified x- and y-coordinates.
    public double distance(double otherX, double otherY) {
        return Math.sqrt(Math.pow(x-otherX, 2) + Math.pow(y-otherY, 2));
    }

    // A static method named distance that returns the distance from two MyPoint objects.
    public static double distance(MyPoint that, MyPoint point) {
        return Math.sqrt(Math.pow(that.x-point.x, 2) + Math.pow(that.y-point.y, 2));
    }

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

class PointTest {

    public static void main(String[] args) {
        MyPoint first = new MyPoint(0, 0);
        MyPoint second = new MyPoint(10, 30.5);
        System.out.printf("The distance between " + first + " and " + second + " is %.2f\n", first.distance(second));
    }
}

The distance between (0.0, 0.0) and (10.0, 30.5) is 32.10 Process finished with exit code 0