(3)编写"ColoredCircle”类，表示圆周颜色的Color类对象borderColor和圆心颜色对象centerColor 至少定义如下几个ColoredCircle构造方法： ColoredCirle()：将半径赋为0，将圆心赋为(0,0)点，将两个颜色赋为Color(0,0,0)对象 ColoredCirle(Point center,int radius)：半径为radius，圆心为center，颜色为(0,0,0) ColoredCirle(Color centerColor,Color borderColor)：半径为0，圆心为(0,0)点，颜色分别为centerColor和borderColor ColoredCirle(Point center, int radius, Color centerColor, Color borderColor)：圆心为center，半径为radius，圆心颜色为centerColor，边框颜色为borderColor 设置颜色方法： void setCenterColor(Color c) void setBorderColor(Color c) 获取颜色方法： Color getCenterColor() Color getBorderColor()

以下是实现要求的代码：

public class ColoredCircle {
    private Point center;
    private int radius;
    private Color centerColor;
    private Color borderColor;

    public ColoredCircle() {
        this.center = new Point(0, 0);
        this.radius = 0;
        this.centerColor = new Color(0, 0, 0);
        this.borderColor = new Color(0, 0, 0);
    }

    public ColoredCircle(Point center, int radius) {
        this.center = center;
        this.radius = radius;
        this.centerColor = new Color(0, 0, 0);
        this.borderColor = new Color(0, 0, 0);
    }

    public ColoredCircle(Color centerColor, Color borderColor) {
        this.center = new Point(0, 0);
        this.radius = 0;
        this.centerColor = centerColor;
        this.borderColor = borderColor;
    }

    public ColoredCircle(Point center, int radius, Color centerColor, Color borderColor) {
        this.center = center;
        this.radius = radius;
        this.centerColor = centerColor;
        this.borderColor = borderColor;
    }

    public void setCenterColor(Color c) {
        this.centerColor = c;
    }

    public void setBorderColor(Color c) {
        this.borderColor = c;
    }

    public Color getCenterColor() {
        return this.centerColor;
    }

    public Color getBorderColor() {
        return this.borderColor;
    }
}

这个ColoredCircle类表示带颜色的圆，包含圆心坐标、半径、圆心颜色和边框颜色。我们定义了四个构造方法，分别对应不同的初始化方式。设置颜色的方法非常简单，只需要设置对应的颜色对象即可。获取颜色的方法也很简单，只需要返回对应的颜色对象即可。