java
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
public class TestSort {
public static void main(String[] args) {
CityModel city1 = new CityModel();
city1.setCity_code(1);
CityModel city2 = new CityModel();
city2.setCity_code(2);
CityModel city3 = new CityModel();
city3.setCity_code(3);
CityModel city4 = new CityModel();
city4.setCity_code(4);
CityModel city5 = new CityModel();
city5.setCity_code(5);
ArrayList<CityModel> list = new ArrayList<>();
list.add(city4);
list.add(city1);
list.add(city2);
list.add(city5);
list.add(city3);
Collections.sort(list, new Comparator<CityModel>(){
public int compare(CityModel o1, CityModel o2) {
//按照CityModel的city_code字段进行降序排列
if(o1.getCity_code() < o2.getCity_code()){
return -1;
}
if(o1.getCity_code() == o2.getCity_code()){
return 0;
}
return 1;
}
});
for (CityModel cityModel:list) {
System.out.println(cityModel.getCity_code());
}
}
}
再小的努力,乘以365都很明显!
一个程序员最重要的能力是:写出高质量的代码!!
有道无术,术尚可求也,有术无道,止于术。
无论你是年轻还是年长,所有程序员都需要记住:时刻努力学习新技术,否则就会被时代抛弃!