2020.02.26 TreeMap集合

Posted 2021-03-07 aojie

package com.guoyun.bean;


import java.sql.Time;

/**
 * ClassName:
 * Function:  ADD FUNCTION
 * Reason:   ADD REASON
 *
 * @author
 * @Date
 * @since Ver 1.1
 */
public class TimeBean implements Comparable<TimeBean>{
    //年
    public int year;
    //描述信息
    public String desc;


    @Override
    public int compareTo(TimeBean o) {
        //升序
        return year-o.year;
    }
}
*********************************************************************

package com.guoyun.view;

import com.guoyun.bean.TimeBean;

import java.io.Serializable;
import java.util.*;

/**
 * ClassName:
 * Function:  ADD FUNCTION
 * Reason:   ADD REASON
 *
 * @author
 * @Date
 * @since Ver 1.1
 */
public class MainView {
    public static void main(String[] args) {
        TreeMap<Integer,String> map1=new TreeMap<>();
        AbstractMap<Integer,String> map2=new TreeMap<>();
        Map<Integer,String> map3=new TreeMap<>();
        NavigableMap<Integer,String> map4=new TreeMap<>();
        SortedMap<Integer,String> map5=new TreeMap<>();
        Cloneable map6=new TreeMap<>();
        Serializable map7=new TreeMap<>();
        map3.put(1,"一个不知名上单");
        map3.put(2,"一个不知名打野");
        map3.put(3,"一个不知名中单");
        map3.put(4,"一个不知名AD");
        map3.put(5,"一个不知名辅助");
//        System.out.println(map3.get(5));
        Set<Integer> set=map3.keySet();
        //String和包装类实现自动排序
        for (Integer i:set
             ) {
//            System.out.println(i+"	"+map3.get(i));
        }
        Map<TimeBean,String> map8=new TreeMap<>(new MyComparator());
        TimeBean t1=new TimeBean();
        t1.year=1999;
        t1.desc="Birthday";
        TimeBean t2=new TimeBean();
        t2.year=2000;
        t2.desc="After";
        TimeBean t3=new TimeBean();
        t3.year=1998;
        t3.desc="Your";
        map8.put(t1,"aojiedechushengriqi");
        map8.put(t2,"aojietayisuile");
        map8.put(t3,"mourendeshengri");
        Set<Map.Entry<TimeBean,String>> set1=map8.entrySet();
        for (Iterator<Map.Entry<TimeBean, String>> iterator = set1.iterator(); iterator.hasNext(); ) {
            Map.Entry<TimeBean, String> next =  iterator.next();
            System.out.println(next.getKey().year+"	"+next.getValue());
        }

    }
}
****************************************************

package com.guoyun.view;

import com.guoyun.bean.TimeBean;

import java.util.Comparator;

/**
 * ClassName:
 * Function:  ADD FUNCTION
 * Reason:   ADD REASON
 *
 * @author
 * @Date
 * @since Ver 1.1
 */
public class MyComparator implements Comparator<TimeBean> {
    @Override
    public int compare(TimeBean o1, TimeBean o2) {
        return o1.year-o2.year;
    }
}