Created
January 26, 2016 13:39
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Figures Polimorfizm
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package Figures_polimorfism; | |
public class Circle extends Rectangle { | |
public Circle(){ | |
r=5; | |
//System.out.println("Конструктор Круг"); | |
} | |
public Circle( int r){ | |
this.r=r; | |
//System.out.println("Конструктор Круг"); | |
} | |
@Override | |
public String getName(){ | |
return "Круг с радиусом: " + r + " "; | |
} | |
@Override | |
public int Area(){ | |
return (int) (Math.PI*Math.pow(r, 2)); | |
} | |
} |
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package Figures_polimorfism; | |
public abstract class Figures { | |
protected int a; | |
protected int b; | |
protected int c; | |
protected int r; | |
public Figures(){ | |
//System.out.println("Конструктор Фигуры"); | |
} | |
public String getName(){ | |
return "Фигура"; | |
} | |
public int getA (){ | |
return a; | |
} | |
public int getB (){ | |
return b; | |
} | |
public int getC (){ | |
return c; | |
} | |
public int getR (){ | |
return r; | |
} | |
public abstract int Area(); | |
} | |
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package Figures_polimorfism; | |
//Построить иерархию классов «Фигуры» с учетом знаний о | |
//полиморфизме. У каждого класса фигуры должен быть | |
//метод подсчета площади. Создать список фигур. Вывести | |
//площади всех фигур на экран. | |
public class MyClass { | |
public static void main (String [] args){ | |
Figures [] list = { | |
new Triangle (), | |
new Rectangle(), | |
new Circle(), | |
new Triangle (9,4,5,4), | |
new Rectangle(2,5), | |
new Circle(8) | |
}; | |
System.out.println("------------------------------------------------------"); | |
for(Figures f : list){ | |
System.out.println(f.getName() + " и площадью = " + f.Area()); | |
System.out.println("------------------------------------------------------"); | |
} | |
} | |
} |
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package Figures_polimorfism; | |
public class Rectangle extends Triangle { | |
public Rectangle(){ | |
a=5;b=6; | |
//System.out.println("Конструктор Прямоугольник"); | |
} | |
public Rectangle(int a, int b){ | |
this.a=a; | |
this.b=b; | |
//System.out.println("Конструктор Прямоугольник"); | |
} | |
@Override | |
public String getName(){ | |
return "Прямоугольник со сторонами: " + a + " x " + b + " "; | |
} | |
@Override | |
public int Area(){ | |
return a*b; | |
} | |
} |
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package Figures_polimorfism; | |
public class Triangle extends Figures { | |
public Triangle(){ | |
a=5;b=4;c=6;r=4; | |
//System.out.println("Конструктор Треугольник"); | |
} | |
public Triangle(int a, int b, int c, int r){ | |
this.a=a; | |
this.b=b; | |
this.c=c; | |
this.r=r; | |
//System.out.println("Конструктор Треугольник"); | |
} | |
@Override | |
public String getName(){ | |
return "Треугольник со сторонами: " + a + " x " + b + " x " + c; | |
} | |
@Override | |
public int Area(){ | |
return (a*b*c)/(4*r); | |
} | |
} |
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