import java.util.Comparator;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeMap;
public class TreeMapTest
{
public static void main(String[] args)
{
Person p1 = new Person(100);
Person p2 = new Person(70);
Person p3 = new Person(90);
Person p4 = new Person(60);
TreeMap<Integer, Person> treeMap = new TreeMap<Integer, Person>(new MyComparator());
treeMap.put(Integer.valueOf(p1.getScore()), p1);
treeMap.put(Integer.valueOf(p2.getScore()), p2);
treeMap.put(Integer.valueOf(p3.getScore()), p3);
treeMap.put(Integer.valueOf(p4.getScore()), p4);
Set<Integer> key = treeMap.keySet();
for(Iterator<Integer> iterator = key.iterator(); iterator.hasNext();) {
Integer keyInteger = (Integer)iterator.next();
Person person = (Person)treeMap.get(keyInteger);
System.out.println(keyInteger + ":" + person.toString());
}
}
}
class Person {
private int score;
public Person(int score) {
this.score = score;
}
public int getScore()
{
return score;
}
public void setScore(int score)
{
this.score = score;
}
}
//根据键自定义比较器
class MyComparator implements Comparator<Integer> {
@Override
public int compare(Integer o1, Integer o2)
{
return o2.intValue() - o1.intValue();
}
}
import java.util.Iterator;
import java.util.Set;
import java.util.TreeMap;
public class TreeMapTest
{
public static void main(String[] args)
{
Person p1 = new Person(100);
Person p2 = new Person(70);
Person p3 = new Person(90);
Person p4 = new Person(60);
TreeMap<Integer, Person> treeMap = new TreeMap<Integer, Person>(new MyComparator());
treeMap.put(Integer.valueOf(p1.getScore()), p1);
treeMap.put(Integer.valueOf(p2.getScore()), p2);
treeMap.put(Integer.valueOf(p3.getScore()), p3);
treeMap.put(Integer.valueOf(p4.getScore()), p4);
Set<Integer> key = treeMap.keySet();
for(Iterator<Integer> iterator = key.iterator(); iterator.hasNext();) {
Integer keyInteger = (Integer)iterator.next();
Person person = (Person)treeMap.get(keyInteger);
System.out.println(keyInteger + ":" + person.toString());
}
}
}
class Person {
private int score;
public Person(int score) {
this.score = score;
}
public int getScore()
{
return score;
}
public void setScore(int score)
{
this.score = score;
}
}
//根据键自定义比较器
class MyComparator implements Comparator<Integer> {
@Override
public int compare(Integer o1, Integer o2)
{
return o2.intValue() - o1.intValue();
}
}