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最新推荐文章于 2025-08-04 22:00:33 发布

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最新推荐文章于 2025-08-04 22:00:33 发布

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分类专栏：中级实训文章标签： java

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这篇博客详细解析了游戏中的跳跃者（Jumper）角色的行为逻辑。当跳跃者面前两格有花时，它会跳跃；若为岩石，则改变方向。如果两格前方超出地图边界，同样会改变方向。遇到边缘，跳跃者会按顺时针旋转90度。如果有其他非花或岩石的演员在前方，两者都会改变方向。此外，文章还探讨了在所有相邻位置都被岩石占据时，跳跃者的可能行为。

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Inception: clarify the details of the problem:

a. What will a jumper do if the location in front of it is empty, but the location two cells in front contains a flower or a rock?

Answer:
If the location two cells in front contains a flower then the jumper will jump.
If the location two cells in front contains a rock then the jumper won’t jump but chang its direction.

source code:

// @file: Part3/Jumper.java
// @line: 55~65 108~124
 public void act()
    {
       if(canJump())
       {
    	   jump();
       }
       else
       {
    	   turn();
       }
    }

  public boolean canJump()
    {
    	Grid<Actor> gr = getGrid();
    	if(gr == null)
    	{
    		return false;
    	}
    	Location loc = getLocation();
    	Location next = loc.getAdjacentLocation(getDirection()).getAdjacentLocation(getDirection());
    	if(!gr.isValid(next))
    	{
    		return false;
    	}
    	Actor actor = gr.get(next);
    	return (actor == null) || (actor instanceof Flower);
    	
    }

b. What will a jumper do if the location two cells in front of the jumper is out of the grid?

Answer: The jumper won’t jump but chang its direction.

source code:

// @file: Part3/Jumper.java
// @line:57~64 117~120
 if(canJump())
       {
    	   jump();
       }
       else
       {
    	   turn();
       }

 if(!gr.isValid(next))
    	{
    		return false;
    	}

c. What will a jumper do if it is facing an edge of the grid?

Answer: The jumper won’t jump but chang its direction, like rotate 90 degrees clockwise

source code:

// @file: Part3/Jumper.java
// @line: 70~73
public void turn() 
    {
    	setDirection(getDirection() + Location.RIGHT);
    }

d. What will a jumper do if another actor (not a flower or a rock) is in the cell that is two cells in front of the jumper?

Answer: The jumper(both of them) won’t jump but chang its direction.

Source code:

// @file: Part3/Jumper.java
// @line: 122
return (targetDes == null) || (targetDes instanceof Flower);

e. What will a jumper do if it encounters another jumper in its path?

Answer: The jumper(both of them) won’t jump but chang its direction.

Source code:

// @file: Part3/Jumper.java
// @line: 122
return (targetDes == null) || (targetDes instanceof Flower)

f. Are there any other tests the jumper needs to make?

Answer: When all the alternative next location are occupied by rocks what will the Jumper do.