Authors:
Stuart Reges, Marty Stepp
Chapter:
Classes
Exercise:
Exercises
Question:9 | ISBN:9780136091813 | Edition: 2
Question
Write a class called Line that represents a line segment between two Points. Your Line objects should have the
following methods:
public Line(Point p1, Point p2)
Constructs a new Line that contains the given two Points.
public Point getP1()
Returns this Line’s first endpoint.
public Point getP2()
Returns this Line’s second endpoint.
public String toString()
Returns a String representation of this Line, such as "[(22, 3), (4, 7)]".
Answer
// package classes;
public class Line {
Point point1;
Point point2;
public Line(Point Point1, Point point2) {
this.point1 = Point1;
this.point2 = point2;
}
public Point getPoint1() {
return point1;
}
public Point getPoint2() {
return point2;
}
public String toString() {
// before calling toString on Point class override Point's toString method.
return "[" +point1.toString()+", " +point2.toString()+"]";
}
public static void main(String[] args) {
Point point1 = new Point(3,7);
Point point2 = new Point(2,6);
Line line = new Line(point1,point2);
System.out.print("the string representation of the line is :"+line);
}
}
Output:
the string representation of the line is :[(3,7), (2,6)]