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  1. public class Main {
  2.     public static void log(Object... o) {
  3.         String s = "";
  4.         for (int i=0; i<o.length; i++) { s += o[i] + " "; }
  5.         System.out.println(s);
  6.     }
  7.  
  8.     public static void main(String[] args) {
  9.         new Main();
  10.     }
  11.     public Main() {
  12.         Shape[] shapes = new Shape[3];
  13.         shapes[0] = new Circle(100, 100, 20);
  14.         Circle c = (Circle)shapes[0];
  15.         c.draw();
  16.         c.move(10, 10.1);
  17.     }
  18.  
  19.     private abstract class Shape {
  20.         private double x = 0, y = 0;
  21.         public Shape(double x, double y) {
  22.             this.x = x;
  23.             this.y = y;
  24.         }
  25.         public double getX() { return x; }
  26.         public double getY() { return y; }
  27.         public abstract void draw();
  28.     }
  29.     private interface Moveable {
  30.         public void move(double x, double y);
  31.     }
  32.  
  33.     private class Circle extends Shape implements Moveable {
  34.         private static final int END = 10;
  35.         private int start = 0;
  36.         private double radius = 0;
  37.         public Circle(double x, double y, double radius) {
  38.             super(x, y);
  39.             this.radius = 0;
  40.         }
  41.         public void draw() {
  42.             log("draw circle");
  43.             log(String.format("center(%.1f, %.1f) - radius(%.1f)", getX(), getY(), radius));
  44.         }
  45.         public void move(double dx, double dy) {
  46.             for (int i=0; i<END; i++) {
  47.                 log((i+1) + "");
  48.                 log(String.format("center(%.1f, %.1f) - radius(%.1f)", getX()+dx, getY()+dy, radius));
  49.             }            
  50.         }
  51.     }
  52. }
Success #stdin #stdout 0.07s 380224KB
comments (?)
stdin 
Standard input is empty
stdout 
draw circle 
center(100.0, 100.0) - radius(0.0) 
1 
center(110.0, 110.1) - radius(0.0) 
2 
center(110.0, 110.1) - radius(0.0) 
3 
center(110.0, 110.1) - radius(0.0) 
4 
center(110.0, 110.1) - radius(0.0) 
5 
center(110.0, 110.1) - radius(0.0) 
6 
center(110.0, 110.1) - radius(0.0) 
7 
center(110.0, 110.1) - radius(0.0) 
8 
center(110.0, 110.1) - radius(0.0) 
9 
center(110.0, 110.1) - radius(0.0) 
10 
center(110.0, 110.1) - radius(0.0)
https://ideone.com/6GKvOK
language:
Java (12.0.1)
created:
13 years ago
visibility:
secret

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