java - 无法实例化类型 Chessboard.Type

Question

这个问题已经有答案了:

Gettin enum types may not be instantiated Exception (3 个回答)

已关闭 7 年前。

好吧，我正在开展一个学校项目，我们将 C++ 转换为 Java，并且我已经取得了相当大的进展。该项目是一个国际象棋游戏。代码如下:

package Chess;

import java.util.Enumeration;

public class ChessBoard{
/* This enum represents values for each of the possible "pieces" that can
 * occupy a space on the chess board, including "blank" for a vacant space.
 */


public enum Type
{
  BLANK,
  PAWN,
  BISHOP,
  KNIGHT,
  ROOK,
  QUEEN,
  KING;

    public int getValue()
    {
        return this.ordinal();
    }

    public static Type forValue(int value)
    {
        return values()[value];
    }
}

public class Coord
{
  public short m_X;
  public short m_Y;
}

public class GlobalMembers
{
    /* These const values are used for identifying whether the "piece" occupying
     * a chess board space is black, white, or in the case of a blank spot,
     * "clear."
     */

    public static final short BLACK = 0;

    public static final short WHITE = 1;

    public static final short CLEAR = 2;

    public static final short CHECK_MOVE = 1; // this is a piece move "mode" designating an AI board evaluation

    public static final short REAL_MOVE = 2; // this is a piece move "mode" designating an actual AI move
}


public class ChessPiece
{

  /* The ctor for ChessPiece takes a piece type and color.
   */

  public ChessPiece(Type type, short color)
  {
      this.m_type = type;
      this.m_color = color;
      this.m_moves = 0;
  }
  public void dispose()
  {
  }

  /* This member function returns the chess piece type.
   */

  public final Type getType()
  {
    return m_type;
  }

  /* This member function returns the chess piece color.
   */

  public final short getColor()
  {
    return m_color;
  }

  /* This function is used to record a new movement of a piece. Movement tracking
   * is necessary for evaluating validity of special piece moves like en passant
   * capture and castling.
   */

  public final void incrementMoves()
  {
    ++m_moves;
  }

  /* Reduces the number of times a piece has been moved. Used for adjustment when
   * a function incidentally increments the movement of a piece in a case where
   * a board evaluation is taking place, and is not intended as an actual move.
   */

  public final void decrementMoves()
  {
    --m_moves;
  }

  /* Returns the number of times a piece has been moved.
   */

  public final int getMoves()
  {
    return m_moves;
  }
  private Type m_type = new Type(); // this variable holds the type of piece this object represents

  private short m_color; // this variable holds the color of the piece, white or black
  private int m_moves; // this variable holds the number of moves the piece has made
}

}

问题是当我开始

private Type m_type = new Type();

它指出“无法实例化类型 Chessboard.Type”

现在我已经到处看了，包括here

正如您所看到的，该程序与此程序非常不同，并且每当您在程序中引用 Type 时，都会抛出此错误。有谁知道如何解决这一问题？

Answer 1

停止尝试实例化枚举类型。

例如，您可以将初始化编写为如下所示:

private Type m_type = Type.BLANK;