basicbox.java

来自「国外的数据结构与算法分析用书」· Java 代码 · 共 39 行

/**	A simple box class with variables for the length, width, and height,  
	and methods to return its volume, a string representation of the box,
	and test for equality. */
public class BasicBox
{
	/**	Instance variables for the class. */
	int length, width, height;

	/**	Constructor for a box. */
	public BasicBox(int l, int w, int h)
	{
		length = l;
		width = w;
		height = h;
	}

	/**	Method for returning the volume of the box. */
	public int volume()
	{
		return length * width * height;
	}
	
	/**	A string representation of the box formed by appending a string
		representation of each attribute. */
	public String toString()
	{
		String temp = "   Length = " + length + "\n"
				+ "   Width  = " + width + "\n"
				+ "   Height = " + height + "\n";
		return temp;
	}

	/**	Does this box have equal variable values as box other? */
	public boolean equals(BasicBox other)
	{
		return length == other.length & width == other.width & height == other.height;
	}
}