集合-TreeMap详解和TreeSet详解以及两者的区别
public class Person1 implements Comparable<Person1>
{
private int age;
private String name;
public Person1(String name, int age)
{
this.name = name;
this.age = age;
}
@Override
public int compareTo(Person1 o)
{
return this.age-o.age;
}
@Override
public String toString()
{
return name+":"+age;
}
}
public class TreeMapDemo{
public static void main(String [] args){
Map<Person1,Integer> map = new TreeMap<>();
Person1 person1 = new Person1("zzh",18);
Person1 person2 = new Person1("jj",17);
Person1 person3 = new Person1("qq",19);
map.put(person1, 1);
map.put(person2, 2);
map.put(person3, 3);
for(Entry<Person1, Integer> entry:map.entrySet()){
System.out.println(entry.getKey()+":"+entry.getValue());
}
}
}
//测试结果：
//jj:17:2
//zzh:18:1
//qq:19:3