package tushu;
import java.util.Comparator;
import java.util.TreeMap;
public class TreeMapTest {
public static void main(String[] args) {
TreeMap<String,Book> map=
new TreeMap<String,Book>(
new MyComparator());
map.put("B45678",
new Book(
"B45678",
"钢铁是怎样连城的",
"保尔",
56));
map.put("B678",
new Book(
"B678",
"世界时平的",
"保尔",
56));
map.put("D89",
new Book(
"D89",
"java编程思想",
"kobe",
56));
map.put("A15678",
new Book(
"A15678",
"高等数学",
"joms",
56));
System.out.println(map);
}
}
class Book {
String bookno;
String bookName;
String author;
int price;
public String getBookno() {
return bookno;
}
public void setBookno(String bookno) {
this.bookno =
bookno;
}
public String getBookName() {
return bookName;
}
public void setBookName(String bookName) {
this.bookName =
bookName;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author =
author;
}
public int getPrice() {
return price;
}
public void setPrice(
int price) {
this.price =
price;
}
@Override
public String toString() {
return "Book [bookno=" + bookno +
", bookName=" +
bookName
+
", author=" + author +
", price=" + price +
"]";
}
public Book(String bookno, String bookName, String author,
int price) {
super();
this.bookno =
bookno;
this.bookName =
bookName;
this.author =
author;
this.price =
price;
}
}
class MyComparator implements Comparator<String>
{
@Override
public int compare(String o1, String o2) {
if(o1.length()==
o2.length()){
return o1.compareTo(o2);
}
return o1.length()-
o2.length();
}
}
转载于:https://www.cnblogs.com/zyy1130/p/6834579.html
