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  1. public class Robot {
  2.  
  3.     private int x = 0;
  4.     private int y = 0;
  5.     private Direction direction = Direction.UP;
  6.  
  7.     public Robot(Direction direction, int x, int y){
  8.         this.direction = direction;
  9.         this.x = x;
  10.         this.y = y;
  11.     }
  12.  
  13.     public Direction getDirection() {
  14.         return direction;
  15.     }
  16.  
  17.     public int getX() {
  18.         // текущая координата X
  19.         return x;
  20.     }
  21.  
  22.     public int getY() {
  23.         // текущая координата Y
  24.         return y;
  25.     }
  26.  
  27.     public void turnLeft() {
  28.         // повернуться на 90 градусов против часовой стрелки
  29.         switch (direction) {
  30.             case UP:
  31.                 direction = Direction.LEFT;
  32.                 break;
  33.             case LEFT:
  34.                 direction = Direction.DOWN;
  35.                 break;
  36.             case DOWN:
  37.                 direction = Direction.RIGHT;
  38.                 break;
  39.             case RIGHT:
  40.                 direction = Direction.UP;
  41.                 break;
  42.         }
  43.         System.out.println("Direction: "+direction);
  44.     }
  45.  
  46.     public void turnRight() {
  47.         // повернуться на 90 градусов по часовой стрелке
  48.         switch (direction) {
  49.             case UP:
  50.                 direction = Direction.RIGHT;
  51.                 break;
  52.             case LEFT:
  53.                 direction = Direction.UP;
  54.                 break;
  55.             case DOWN:
  56.                 direction = Direction.LEFT;
  57.                 break;
  58.             case RIGHT:
  59.                 direction = Direction.DOWN;
  60.                 break;
  61.         }
  62.         System.out.println("Direction: "+direction);
  63.     }
  64.  
  65.     public void stepForward() {
  66.         // шаг в направлении взгляда
  67.         // за один шаг робот изменяет одну свою координату на единицу
  68.         switch (direction) {
  69.             case UP:
  70.                 y++;
  71.                 break;
  72.             case LEFT:
  73.                 x--;
  74.                 break;
  75.             case DOWN:
  76.                 y--;
  77.                 break;
  78.             case RIGHT:
  79.                 x++;
  80.                 break;
  81.         }
  82.         System.out.println("Moving in direction: "+direction);
  83.         System.out.println("(x;y) = (" + x + ";" + y + ")");
  84.     }
  85.  
  86.     public enum Direction {
  87.         UP,
  88.         DOWN,
  89.         LEFT,
  90.         RIGHT
  91.     }
  92.  
  93. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:1: error: class Robot is public, should be declared in a file named Robot.java
public class Robot {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/DJanop
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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