所以我试图用Java编写国际象棋程序,但是我的getColor()方法遇到了一些问题。我依赖Gridworld的一些代码。我为每件作品创造了一个课程。我希望这个作品像Gridworld中的一个小动物一样工作,因为我有一个方法可以创建一个可以在移动时选择的可能位置的ArrayList。这是我遇到问题的地方。我试图创建一个getColor()方法,但由于某种原因它无法正常工作。我向老师求助,但他和我一样困惑。我试过调试它,但我没有看到它有什么问题。我得到的确切错误是:
“找不到符号 - 方法getColor()”
这是我的所有代码,我正在使用BlueJ进行记录:
import java.util.ArrayList;
import java.awt.Color;
public interface Piece
{
public enum PieceType {pawn, rook, knight, bishop, queen, king}
}
接下来是ChessPiece抽象类。我还没有使用过selectMoveLocation方法:
import java.util.ArrayList;
import java.awt.Color;
import info.gridworld.grid.Location;
import info.gridworld.grid.BoundedGrid;
public abstract class ChessPiece implements Piece
{
Color colorOfPiece;
PieceType typeOfPiece;
public BoundedGrid<Object> board;
public Location location;
public ArrayList moveLocations;
public ChessPiece( Color whiteOrBlack, PieceType selectedType)
{
if (whiteOrBlack == Color.BLACK || whiteOrBlack == Color.WHITE)
{
if ((selectedType == PieceType.pawn || selectedType == PieceType.rook || selectedType == PieceType.knight || selectedType == PieceType.bishop ||selectedType == PieceType.queen || selectedType == PieceType.king))
{
colorOfPiece = whiteOrBlack;
typeOfPiece = selectedType;
location = null;
}
}
}
public Color getColor()
{
return colorOfPiece;
}
public void makeMove(Location newLocation)
{
if (board == null)
throw new IllegalStateException("This actor is not in a board.");
if (board.get(location) != this)
throw new IllegalStateException(
"The board contains a different actor at location "
+ location + ".");
if (!board.isValid(newLocation))
throw new IllegalArgumentException("Location " + newLocation
+ " is not valid.");
if (newLocation.equals(location))
return;
board.remove(location);
location = newLocation;
board.put(location, this);
}
public Location getLocation()
{
return location;
}
public BoundedGrid<Object> getBoard()
{
return board;
}
public Location selectMoveLocation(ArrayList<Location> moveLocations)
{
Location selection;
selection = null;
//mouse stuff
return selection;
}
}
最后,代码给了我编译错误。这只是我的King作品的代码,虽然它为我尝试并实现它的每一件都给了我错误:
import java.awt.Color;
import java.util.ArrayList;
import info.gridworld.grid.Location;
import info.gridworld.grid.BoundedGrid;
//must fix problem with getColor()
public class King extends ChessPiece
{
ArrayList<Location> moveLocations;
// private Color colorOfPiece;
public King( Color whiteOrBlack )
{
super(whiteOrBlack, PieceType.king);
//colorOfPiece = whiteOrBlack;
}
public void getMoveLocations()
{
moveLocations.clear();
for (int i = 0; i < 360; i += 45)
{
if ((getBoard().isValid(getLocation().getAdjacentLocation(i))) && (((getBoard().get(getLocation().getAdjacentLocation(i))) == null) || (((getBoard().get(getLocation().getAdjacentLocation(i)))).getColor() == colorOfPiece)))
{
moveLocations.add(getLocation().getAdjacentLocation(i));
}
}
}
}
答案 0 :(得分:1)
getBoard()。get(..)根据我在网上找到的文档返回模板类型E,在你的情况下,E是类型Object(因为你在ChessPiece中的棋盘数据成员是对象的集合。)对象没有getColor()方法。你需要将((getBoard()。get(getLocation()。getAdjacentLocation(i))))转换为具有getColor方法的类。(或者将你的棋盘改为ChessPieces的集合)