类型不匹配：无法从Son转换为Super

Question

我正在用Java开发Stratego游戏，但其中一个游戏部件出现了问题，这引发了错误：

  

“类型不匹配：无法从常规转换为片断”

我还有其他所有部件，例如炸弹侦察员，马歇尔等。都已定义并且可以正常工作，但是，该gGeneral给了我该错误，我似乎无法理解为什么，因为当我编写代码时，我确实复制从其他棋子粘贴而来的副本，并仅更改其值（用于战斗目的的棋子的整数值）及其图标。

这是其中之一的示例代码：

package Strategu.Pecas;

import javax.swing.ImageIcon;

import Strategu.Piece;

public class Major extends Piece {
public ImageIcon imageRed = new ImageIcon(
        "D:\\faculdade\\Modelação e Programação\\code\\MOP\\src\\Strategu\\Gallery\\red\\Major.png");
public ImageIcon imageBlue = new ImageIcon(
        "D:\\faculdade\\Modelação e Programação\\code\\MOP\\src\\Strategu\\Gallery\\blue\\Major.png");
ImageIcon image = null;
int value;
public String nome;
public int cx;
public int cy;

public Major(int alliance) {
    super(alliance, Cx, Cy);
    this.value = 7;
    if (alliance == 0)
        image = imageRed;
    if (alliance == 1)
        image = imageBlue;
    this.nome = "Major";

}

@Override
public String getNome() {
    // TODO Auto-generated method stub
    return nome;
}

@Override
public boolean canMoveTo(int x, int y) {// movimento basico de todas as unidades expto o scout
    if ((x == Piece.Cx + 1 & y == Piece.Cy) | (x == Piece.Cx & y == Piece.Cy + 1)
            | (x == Piece.Cx - 1 & y == Piece.Cy) | (x == Piece.Cx & y == Piece.Cy - 1)) {
        return true;
    } else {
        System.out.println("movimento invalido");
    }
    return false;
}

@Override
public ImageIcon getIcon() {
    // TODO Auto-generated method stub
    return image;
}

@Override
public int getValue() {
    // TODO Auto-generated method stub
    return value;
}
}

这是通用文章，我不知道为什么我会因类型不匹配错误而给我带来很多麻烦

package Strategu.Pecas;

import javax.swing.ImageIcon;

import Strategu.Piece;

public class General extends Piece {
public ImageIcon imageRed = new ImageIcon(
        "D:\\faculdade\\Modelação e Programação\\code\\MOP\\src\\Strategu\\Gallery\\red\\General.png");
public ImageIcon imageBlue = new ImageIcon(
        "D:\\faculdade\\Modelação e Programação\\code\\MOP\\src\\Strategu\\Gallery\\blue\\General.png");
ImageIcon image = null;
int value;
public String nome;
public int cx;
public int cy;

public General(int alliance) {
    super(alliance, Cx, Cy);
    this.value = 9;
    if (alliance == 0)
        image = imageRed;
    if (alliance == 1)
        image = imageBlue;
    this.nome = "General";

}

@Override
public String getNome() {
    // TODO Auto-generated method stub
    return nome;
}

@Override
public boolean canMoveTo(int x, int y) {// movimento basico de todas as unidades expto o scout
    if ((x == Piece.Cx + 1 & y == Piece.Cy) | (x == Piece.Cx & y == Piece.Cy + 1)
            | (x == Piece.Cx - 1 & y == Piece.Cy) | (x == Piece.Cx & y == Piece.Cy - 1)) {
        return true;
    } else {
        System.out.println("movimento invalido");
    }
    return false;
}

@Override
public ImageIcon getIcon() {
    // TODO Auto-generated method stub
    return image;
}

@Override
public int getValue() {
    // TODO Auto-generated method stub
    return value;
}
}

我也将作品的抽象类放在这里：

package Strategu;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;

import Strategu.Place.Spot;
import Strategu.board;

public abstract class Piece {

protected final int alliance; // 0 é vermelho 1 é azul

public static int Cx;
public static int Cy;

protected Piece(int alliance, int x, int y) {
    this.alliance = alliance;
    this.Cx = x;
    this.Cy = y;

}

public void setPieceAtPlace(Place p) {
    Piece peça = this;
    int x = p.coordinateX;
    int y = p.coordinateY;
    if (p instanceof Spot) {
        board.tab[x][y] = new Place.Spot(x, y, peça);
        System.out.println("piece adicionada");

    }

}

public void setCxCy(int n, int y) {
    this.Cx = n;
    this.Cy = y;
}

public void sendToGrave(Piece p) {
    if (p.alliance == 1) {
        Graveyard.sendToGrave(p);
    } else {
        Graveyard.sendToGrave(p);
    }
}

public abstract String getNome();

public abstract boolean canMoveTo(int x, int y);

// public abstract Piece moveTo();
public abstract ImageIcon getIcon();

public abstract int getValue();

public String toString() {
    String Ali;

    if (this.alliance == 0) {
        Ali = "RED";
    } else {
        Ali = "BLUE";
    }

    return Ali + " " + getNome() + " " + "value:" + getValue() + " x:" + Piece.Cx + "  y:" + Piece.Cy;

}

}