public class Line implements Figure {
private Point p1;
private Point p2;
public Line() {
this(0, 0, 0, 0);
}
public Line(int x1, int y1, int x2, int y2) {
this.p1 = new Point(x1, y1);
this.p2 = new Point(x2, y2);
}
public void draw() {
System.out.println("[線を描画]始点" + this.p1.getX() + "," + this.p1.getY() + "から終点" + this.p2.getX() + ","
+ this.p2.getY() + "まで");
}
public double getPerimeter() {
double dx = Math.pow(this.p2.getX() - this.p1.getX(), 2);
double dy = Math.pow(this.p2.getY() - this.p1.getY(), 2);
return Math.sqrt(dx + dy);
}
}
public abstract class Shape implements Figure {
public abstract void draw();
public abstract double getPerimeter();
}
public class Line implements Figure {
private Point p1;
private Point p2;
public Line() {
this(0, 0, 0, 0);
}
public Line(int x1, int y1, int x2, int y2) {
this.p1 = new Point(x1, y1);
this.p2 = new Point(x2, y2);
}
public void draw() {
System.out.println("[線を描画]始点" + this.p1.getX() + "," + this.p1.getY() + "から終点" + this.p2.getX() + ","
+ this.p2.getY() + "まで");
}
public double getPerimeter() {
double dx = Math.pow(this.p2.getX() - this.p1.getX(), 2);
double dy = Math.pow(this.p2.getY() - this.p1.getY(), 2);
return Math.sqrt(dx + dy);
}
}
public class Circle extends Shape {
private Point center;
private int radius;
public Circle() {
this(0, 0, 0);
}
public Circle(int x, int y, int r) {
this.center = new Point(x, y);
this.radius = r;
}
public void draw() {
System.out.println("[円を描画]中心点" + this.center.getX() + "," + this.center.getY() + "から半径" + this.radius);
}
public double getPerimeter() {
return this.radius * 2 * Math.PI;
}
}
public abstract class Polygon extends Shape {
protected int angle;
public int getInternalAngle() {
return (this.angle - 2) * 180;
}
}
public class Triangle extends Polygon {
Point p1;
Point p2;
Point p3;
public Triangle(int x1, int y1, int x2, int y2, int x3, int y3) {
this.p1 = new Point(x1, y1);
this.p2 = new Point(x2, y2);
this.p3 = new Point(x3, y3);
super.angle = 3;
}
public void draw() {
System.out.println("[三角形を描画] 点1(" + this.p1.getX() + "," + this.p1.getY() + ")から点2(" + this.p2.getX() + ","
+ this.p2.getY() + "),点3(" + this.p3.getX() + "," + this.p3.getY() + ")の三角形");
}
public double getPerimeter() {
double x21 = this.p2.getX() - this.p1.getX();
double y21 = this.p2.getY() - this.p1.getY();
double a = Math.sqrt(x21 * x21 + y21 * y21);
double x32 = this.p3.getX() - this.p2.getX();
double y32 = this.p3.getY() - this.p2.getY();
double b = Math.sqrt(x32 * x32 + y32 * y32);
double x13 = this.p1.getX() - this.p3.getX();
double y13 = this.p1.getY() - this.p3.getY();
double c = Math.sqrt(x13 * x13 + y13 * y13);
return a + b + c;
}
}
public class Rectangle extends Polygon {
protected Point p;
protected int width;
protected int height;
public Rectangle(int x, int y, int width, int height) {
this.p = new Point(x, y);
this.width = width;
this.height = height;
super.angle = 4;
}
public void draw() {
System.out.println("[長方形(矩形)を描画] 点" + this.p.getX() + "," + this.p.getY() + "を基準として幅" + this.width + "、高さ"
+ this.height + "の長方形");
}
public double getPerimeter() {
return (this.width + this.height) * 2;
}
}
public class Square extends Rectangle {
public Square(int x, int y, int width) {
super(x, y, width, width);
}
public void draw() {
System.out.println("[正方形を描画] 点" + this.p.getX() + "," + this.p.getY() + "を基準として幅・高さ" + this.width + "の正方形");
}
}
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