java - Java根据交付ID在国际交付列表中升序排序

Question

这是在java中的类应用程序中编码。此类关于在本地和海外交付的应用程序。所以，我需要对海外身份证号进行升序排序。

import java.util.ArrayList;
import java.util.*;
public class Delivery App
{
public static void main(String[] args)
{
    ArrayList myDeliveryList = new ArrayList();

    Delivery d;
    d = new Delivery("Hassan Ali", "R4321", 'L', 93.59);
    myDeliveryList.add(d);
    d = new Delivery("Ahmad Kassim", "M1131", 'O', 11.56);
    myDeliveryList.add(d);
    d = new Delivery("Atikah Hussin", "S4321", 'L', 81.24);
    myDeliveryList.add(d);
    d = new Delivery("Umi Rina", "P9087", 'L', 27.98);
    myDeliveryList.add(d);
    d = new Delivery("Lam Ah Soon", "R2342", 'O', 25.67);
    myDeliveryList.add(d);
    d = new Delivery("Zaidi Zain", "N8876", 'O', 51.99);
    myDeliveryList.add(d);
    d = new Delivery("Mohd. Mahmud", "D3321", 'L', 13.32);
    myDeliveryList.add(d);
    d = new Delivery("Gopal Samy", "S1134", 'L', 80.87);
    myDeliveryList.add(d);
    d = new Delivery("Ina Naim", "P3456", 'O', 32.67);
    myDeliveryList.add(d);
    d = new Delivery("Suffian Suhaimi", "P3217", 'L', 79.88);
    myDeliveryList.add(d);

    for(int i=0; i<myDeliveryList.size(); i++)
    {
       d= (Delivery)myDeliveryList.get(i);
       //to display detail about hassan ali only
       if (d.getCN().equalsIgnoreCase("hassan ali"))
       {
          System.out.println(d.toString());
       }
    }


    //to make a new ArrayList for local and oversea
    ArrayList LocalDeliveryList = new ArrayList();
    ArrayList InternationalDeliveryList = new ArrayList();
    for (int i=0; i<myDeliveryList.size(); i++)
    {
      d= (Delivery)myDeliveryList.get(i);
      //to add all destination in their own categorize
      if (d.getD() == 'L')
      {
          LocalDeliveryList.add(d);
      }
      else
      {
          InternationalDeliveryList.add(d);
      }
    }
    System.out.println("\nPackage delivered to local destination : "+LocalDeliveryList.size());
    System.out.println(" Package delivered to international destination: "+InternationalDeliveryList.size());


    double Ltotal=0.00;
    double Ototal=0.00;
    double priceL;
    double priceO;
    //to calculate the total for one package either in local and oversea
    for (int i=0; i<myDeliveryList.size(); i++)
    {
      d= (Delivery)myDeliveryList.get(i);
      if (d.getD() == 'L')
      {
          priceL = 7.00;
          Ltotal = priceL*d.getW();
      }
      else
      {
          priceO = 11.00;
          Ototal = priceO*d.getW();
      }
    }

我尝试使用它对其进行排序，collections.sort()但它无法读取。你们能帮我按身份证号码对国际快递进行分类吗？我只想对国际送货清单中的身份证号进行排序。

标签： javaarraylist

Answer 1

这可能对您有用：

InternationalDeliveryList.sort(Comparator.comparing(Delivery::getId));

getId- 是要排序的字段的 getter 方法

在创建 ArrayList 时还要指定类型。

ArrayList<Delivery> InternationalDeliveryList = new ArrayList();

完整代码：

import java.util.ArrayList;import java.util.Comparator;

public class Delivery {
    private String cN;
    private char d;
    private double w;
    private String number;

    Delivery(String cN,String number,char d,double w){
        this.cN=cN;
        this.number=number;
        this.d=d;
        this.w=w;
    }

    public double getW() {
        return w;
    }

    public void setW(double w) {
        this.w = w;
    }

    public char getD() {
        return d;
    }

    public void setD(char d) {
        this.d = d;
    }

    public String getCN() {
        return cN;
    }

    public void setCN(String cN) {
        this.cN = cN;
    }


    public static void main(String[] args) {
        ArrayList<Delivery> myDeliveryList = new ArrayList();

        Delivery d;
        d = new Delivery("Hassan Ali", "R4321", 'L', 93.59);
        myDeliveryList.add(d);
        d = new Delivery("Ahmad Kassim", "M1131", 'O', 11.56);
        myDeliveryList.add(d);
        d = new Delivery("Atikah Hussin", "S4321", 'L', 81.24);
        myDeliveryList.add(d);
        d = new Delivery("Umi Rina", "P9087", 'L', 27.98);
        myDeliveryList.add(d);
        d = new Delivery("Lam Ah Soon", "R2342", 'O', 25.67);
        myDeliveryList.add(d);
        d = new Delivery("Zaidi Zain", "N8876", 'O', 51.99);
        myDeliveryList.add(d);
        d = new Delivery("Mohd. Mahmud", "D3321", 'L', 13.32);
        myDeliveryList.add(d);
        d = new Delivery("Gopal Samy", "S1134", 'L', 80.87);
        myDeliveryList.add(d);
        d = new Delivery("Ina Naim", "P3456", 'O', 32.67);
        myDeliveryList.add(d);
        d = new Delivery("Suffian Suhaimi", "P3217", 'L', 79.88);
        myDeliveryList.add(d);

        for (int i = 0; i < myDeliveryList.size(); i++) {
            d = (Delivery) myDeliveryList.get(i);
            // to display detail about hassan ali only
            if (d.getCN().equalsIgnoreCase("hassan ali")) {
                System.out.println(d.toString());
            }
        }

        // to make a new ArrayList for local and oversea
        ArrayList LocalDeliveryList = new ArrayList();
        ArrayList<Delivery> InternationalDeliveryList = new ArrayList();
        for (int i = 0; i < myDeliveryList.size(); i++) {
            d = (Delivery) myDeliveryList.get(i);
            // to add all destination in their own categorize
            if (d.getD() == 'L') {
                LocalDeliveryList.add(d);
            } else {
                InternationalDeliveryList.add(d);
            }
        }
        System.out.println("\nPackage delivered to local destination : " + LocalDeliveryList.size());
        System.out.println(" Package delivered to international destination: " + InternationalDeliveryList.size());

        InternationalDeliveryList.sort(Comparator.comparing(Delivery::getW));

        for(Delivery delivery: InternationalDeliveryList) {
            System.out.println(delivery.getW());
        }

        double Ltotal = 0.00;
        double Ototal = 0.00;
        double priceL;
        double priceO;
        // to calculate the total for one package either in local and oversea
        for (int i = 0; i < myDeliveryList.size(); i++) {
            d = (Delivery) myDeliveryList.get(i);
            if (d.getD() == 'L') {
                priceL = 7.00;
                Ltotal = priceL * d.getW();
            } else {
                priceO = 11.00;
                Ototal = priceO * d.getW();
            }
        }
    }
}