equalsbook.java

来自「国外的数据结构与算法分析用书」· Java 代码 · 共 20 行

package patronBook;

/**	A Book that can be compared to another BOOK by comparing their isbn
	numbers. The class only defines equals(). */	
public class EqualsBook extends Book 
{
	/**	Constructor */
	public EqualsBook(String t, String a, String i)
	{
		super(t, a, i);
	}

	/**	Is the current Book equal to `other' using isbn for comparison?
		Analysis: Time = O(1) */
	public boolean equals(Object other)
	{
		return isbn.equals(((Book)other).isbn);
	}
}