colorbox.java

来自「国外的数据结构与算法分析用书」· Java 代码 · 共 37 行

/**	A descendant of BasicBox which includes a color attribute.  The toString
	method is changed to display the new color, and a second constructor is added. */
public class ColorBox extends BasicBox
{
	/**	The color of the box. */
	String color;

	/**	Constructor using the default color. */
	public ColorBox(int l, int w, int h)
	{
		super(l, w, h);
		color = "black";
	}

	/**	Constructor for assigning a color. */
	public ColorBox(int l, int w, int h, String c)
	{
		super(l, w, h);
		color = c;
	}
	
	/**	String representation of this box formed by obtaining the BasicBox string
		representation and appending a string representation of the color. */
	public String toString()
	{
		String temp = super.toString();
		temp += "   Color = " + color + "\n";
		return temp;
	}
	
	/**	Does this box have equal variable values as box other? */
	public boolean equals(ColorBox other)
	{
		return super.equals(other) & color.equals(other.color);
	}
}