装箱拆箱排序comparactor

package com.conatructor;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class Box {
    
    public static void main(String[] args)
    {    //装箱
        List<Apple> al = new ArrayList<Apple>();
        al.add(new Apple("app1",19.3,25.4));
        al.add(new Apple("app2",20.7,25.8));
        al.add(new Apple("app3",22.5,25.6));
        
        Collections.sort(al, new Comparator<Apple>() {
            @Override
        public int compare(Apple o1, Apple o2) {
                double c =o1.getheight()-o2.getheight();
                if(c>0)
                    return 1;//正序
                else if(c<0)
                    return -1;//倒序
                else 
                    return 0;
            }
        });
        try {
            ObjectOutputStream oo = new ObjectOutputStream(new FileOutputStream("D:/1.txt"));
            oo.writeObject(al);
            oo.flush();
            oo.close();    
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }    
        //拆箱
//        List<Apple> read= null;
//        try {
//            ObjectInputStream oi = new ObjectInputStream(new FileInputStream("D:/1.txt"));
//             try {
//                read =(List<Apple>) oi.readObject();
//            } catch (ClassNotFoundException e) {
//                // TODO Auto-generated catch block
//                e.printStackTrace();
//            }
//        } catch (FileNotFoundException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        } catch (IOException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        }
        for(Apple x:al)
        {
            System.out.println(x);
        }
    }
    }