simplename.java

Java程序设计(美) David D. Riley著 机械工业出版社 书籍配套 代码

// (Figure 9.29)

public class SimpleName implements Comparable {
	private String firstName;
	private String lastName;

	/**	post:	firstName == first  and  lastName == last */
	public SimpleName(String first, String last) {
		firstName = first;
		lastName = last;
	}

	/**	post:	comparison done alphabetically last name before first */
	public int compareTo(Object s) {
		if ( !(s instanceof SimpleName) )
			System.out.println("Cannot compareTo SimpleName to other type");
		if ( lastName.compareTo(((SimpleName)s).getLast()) < 0 )
			return -1;
		else if ( lastName.compareTo(((SimpleName)s).getLast()) > 0 )
			return 1;
		else
			return firstName.compareTo(((SimpleName)s).getFirst());
	}

	public String getFirst() {
		return firstName;
	}

	public String getLast() {
		return lastName;
	}
}