java - Java改变形状的颜色

我正在尝试用Java制作一个矩形，完成了。我也可以用单色填充它，完成。但是我实际上想更改形状本身的纯色。我知道使用Graphics可以使用g.setColor（）;。但是我已经以特殊方式设置了组件，如下所示：

public class Design extends JComponent {
private static final long serialVersionUID = 1L;

private List<Shape> shapesDraw = new ArrayList<Shape>();
private List<Shape> shapesFill = new ArrayList<Shape>();

GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
int screenWidth = gd.getDisplayMode().getWidth();
int screenHeight = gd.getDisplayMode().getHeight();

public void paint(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    for(Shape s : shapesDraw){
        g2d.draw(s);
    }
    for(Shape s : shapesFill){
        g2d.fill(s);
    }
}

public void drawRect(int xPos, int yPos, int width, int height) {
    shapesDraw.add(new Rectangle(xPos, yPos, width, height));
    repaint();
}

public void fillRect(int xPos, int yPos, int width, int height) {
    shapesFill.add(new Rectangle(xPos, yPos, width, height));
    repaint();
}

public void drawTriangle(int leftX, int topX, int rightX, int leftY, int topY, int rightY) {
    shapesDraw.add(new Polygon(
            new int[]{leftX, topX, rightX},
            new int[]{leftY, topY, rightY},
            3));
    repaint();
}

public void fillTriangle(int leftX, int topX, int rightX, int leftY, int topY, int rightY) {
    shapesFill.add(new Polygon(
            new int[]{leftX, topX, rightX},
            new int[]{leftY, topY, rightY},
            3));
    repaint();
}

public Dimension getPreferredSize() {
    return new Dimension(screenWidth, screenHeight);
}

public int getWidth() {
    return screenWidth;
}
public int getHeight() {
    return screenHeight;
}

}

如您所见，它不仅使用绘图和填充，还使用列表进行绘制。有什么方法可以更改list 内的颜色吗？我最好希望每种绘制/填充形状内部的颜色都是可更改的。

谢谢您的帮助。

从答案更新：

我的类来自您的ShapeWrapper示例：

public class Design extends JComponent {
private static final long serialVersionUID = 1L;

private List<ShapeWrapper> shapesDraw = new ArrayList<ShapeWrapper>();
private List<ShapeWrapper> shapesFill = new ArrayList<ShapeWrapper>();

GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
int screenWidth = gd.getDisplayMode().getWidth();
int screenHeight = gd.getDisplayMode().getHeight();

public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    for(ShapeWrapper s : shapesDraw){
        g2d.setColor(s.color);
        g2d.draw(s.shape);
    }
    for(ShapeWrapper s : shapesFill){
        g2d.setColor(s.color);
        g2d.fill(s.shape);
    }
}

public void drawRect(int xPos, int yPos, int width, int height) {
    shapesDraw.add(new Rectangle(xPos, yPos, width, height));
    repaint();
}

public void fillRect(int xPos, int yPos, int width, int height) {
    shapesFill.add(new Rectangle(xPos, yPos, width, height));
    repaint();
}

public void drawTriangle(int leftX, int topX, int rightX, int leftY, int topY, int rightY) {
    shapesDraw.add(new Polygon(
            new int[]{leftX, topX, rightX},
            new int[]{leftY, topY, rightY},
            3));
    repaint();
}

public void fillTriangle(int leftX, int topX, int rightX, int leftY, int topY, int rightY) {
    shapesFill.add(new Polygon(
            new int[]{leftX, topX, rightX},
            new int[]{leftY, topY, rightY},
            3));
    repaint();
}


public Dimension getPreferredSize() {
    return new Dimension(getWidth(), getHeight());
}

public int getWidth() {
    return screenWidth;
}
public int getHeight() {
    return screenHeight;
}

}

class ShapeWrapper {

    Color color;
    Shape shape;

    public ShapeWrapper(Color color , Shape shape){
        this.color = color;
        this.shape = shape;
    }
}

现在，我正在Eclipse中进行编码，除了一件事情外，其他一切都正常！
每当它说shapesDraw / shapesFill.add（）时，它说：

类型List中的方法add（ShapeWrapper）不适用于参数（Rectangle）

很近！请回答。

最佳答案

您可以使用类似：

private class ShapeWrapper {

    private Color color;
    private Shape shape;

    public ShapeWrapper(Color color , Shape shape){
        this.color = color;
        this.shape = shape;
    }
}

而不是普通的Shape用于存储Shape + Color。

然后像下面这样绘制它们：

public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    for(ShapeWrapper s: shapesDraw){
        g2d.setColor(s.color);
        g2d.draw(s.shape);
    }
    for(ShapeWrappers s : shapesFill){
        g2d.setColor(s.color);
        g2d.fill(s.shape);
    }
}

编辑：根据您的例外，您尝试将另一个类（ShapeWrapper）的对象添加到类型列表（Shape），修复方法类似于next：

public void drawRect(int xPos, int yPos, int width, int height) {
    ShapeWrapper wr = new ShapeWrapper(Color.RED,new Rectangle(xPos, yPos, width, height));
    shapesDraw.add(wr);
    repaint();
}