问题描述

这段代码为什么输出不了结果？实在是找不到错误

package com.xiaoyuanling;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Method {
public Passenger[] passenger={new Passenger(""1 ""奥迪A4 ""500""4"")new Passenger(""2 ""马自达6 ""400""4"")new Passenger(""4 ""金龙 ""800""20"")};
public PickUp[] pickUp={new PickUp(""3 ""皮卡雪 ""450""4""2"")};
public Trunk[] trunk={new Trunk(""5 ""松花江 ""400""4"")new Trunk(""6 ""依维柯 ""1000""20"")};
public ArrayList car1;
public ArrayList car2;
public ArrayList car3;
public Set set1;
public Set set2;
public Set set3;
public int[] sum1;
public int[] sum2;
public int[] sum3;
int sumPickUp;
int sumTrunk;
int sumPrice;

public Method(){    car1=new ArrayList<>();    car2=new ArrayList<>();    car3=new ArrayList<>();    set1=new HashSet<>();    set2=new HashSet<>();    set3=new HashSet<>();    sum1=new int[3];    sum2=new int[3];    sum3=new int[4];}public void welcome(){    String number1= ""1"";    String number2= ""0"";    Scanner scanner=new Scanner(System.in);    System.out.println(""欢迎来到嘀嘀打车系统!"");    System.out.println(""您是否要租车:""+number1+""是""+number2+""否"");    int number3=scanner.nextInt();    if(number3==Integer.valueOf(number1)){        System.out.println(""您可租车的类型及其价目表:"");        System.out.println(""序号  ""+""汽车名称 ""+""租金   ""+""容量"");        System.out.println(passenger[0].id+"".""+""    ""+passenger[0].name+""  ""+passenger[0].price+""元/天""+""   ""+passenger[0].pickUp+""人"");        System.out.println(passenger[1].id+"".""+""    ""+passenger[1].name+"" ""+passenger[1].price+""元/天""+""  ""+passenger[1].pickUp+""人"");        System.out.println(pickUp[0].id+"".""+""   ""+pickUp[0].name+""  ""+pickUp[0].price+""元/天""+""   ""+pickUp[0].pickUp+""人""+pickUp[0].capacity+""吨"");        System.out.println(passenger[2].id+"".""+""    ""+passenger[2].name+""   ""+passenger[2].price+""元/天""+""    ""+passenger[2].pickUp+""人"");        System.out.println(trunk[0].id+"".""+""    ""+trunk[0].name+""  ""+trunk[0].price+""元/天""+""   ""+trunk[0].capacity+""吨"");        System.out.println(trunk[1].id+"".""+""    ""+trunk[1].name+""  ""+trunk[1].price+""元/天""+""   ""+trunk[1].capacity+""吨"");    }else if(number3==Integer.valueOf(number2)){        System.out.println(""欢迎下次光临再见"");    }}public void rentCar(){    System.out.println(""请输入你要租车的数量:"");    Scanner input=new Scanner(System.in);    int rentnumber=input.nextInt();    for(int i=0;i<rentnumber;i++){        System.out.println(""请输入第""+(i+1)+""辆车的序号"");        String number1=input.next();            if(number1.equals(passenger[0].id)){            car1.add(passenger[0]);            set1.add(passenger[0]);        }else if(number1.equals(passenger[1].id)){            car1.add(passenger[1]);            set1.add(passenger[1]);        }else if(number1.equals(passenger[2].id)){            car1.add(passenger[2]);            set1.add(passenger[2]);        }else if(number1.equals(pickUp[0].id)){            car2.add(pickUp[0]);            set2.add(pickUp[0]);        }else if(number1.equals(trunk[0].id)){            car3.add(trunk[0]);            set3.add(trunk[0]);        }else if(number1.equals(trunk[1].id)){            car3.add(trunk[1]);            set3.add(trunk[1]);        }    }    System.out.println(""请输入租车天数:"");    String number2=input.next();    System.out.println(""您的账单:"");    System.out.println(""***可载人的车有"");    for(Passenger passenger1:set1){            if(passenger1.id.equals(passenger[0].id)){                System.out.print(""奥迪A4"");            }else if(passenger1.id.equals(passenger[1].id)){                System.out.print(""马自达6"");            }else if(passenger1.id.equals(passenger[2].id)){                System.out.print(""金龙"");            }    }    for(PickUp pickUp1:set2){        if(pickUp1.id.equals(pickUp[0].id)){            System.out.print(""皮卡雪"");        }    }    for(Passenger passenger2:car1){        sum1[0] += Integer.parseInt(passenger2.pickUp);    }    for(PickUp pickUp2:car2){        sum1[1] += Integer.parseInt(pickUp2.pickUp);    }    sum1[2]=sum1[0]+sum1[1];    System.out.println(""共载人:"" + sum1[2]);    System.out.println(""***载货的车有:"");    for(PickUp pickUp3:set2){        if(pickUp3.id.equals(pickUp[0].id)){            System.out.print(""皮卡雪"");        }    }    for(Trunk trunk1:set3){        if(trunk1.id.equals(passenger[1].id)){                System.out.print(""松花江"");        }else if(trunk1.id.equals(passenger[2].id)){                System.out.print(""依维柯"");        }    }    for(PickUp pickUp4:car2){        sum2[0] += Integer.parseInt(pickUp4.capacity);    }    for(Trunk trunk3:car3){        sum2[1] += Integer.parseInt(trunk3.capacity);    }    sum2[2]=sum2[0]+sum2[1];    System.out.println(""共载货:""+sum2[2]);       System.out.println(""***租车总价格:"");    for(Passenger passenger3:set1){        sumPrice += ((Integer.parseInt(passenger3.price))*Integer.parseInt(number2));        sum3[0]=sumPrice;    }    for(PickUp pickUp4:set2){        sumPrice += ((Integer.parseInt(pickUp4.price))*Integer.parseInt(number2));        sum3[1]=sumPrice;    }    for(Trunk trunk4:set3){        sumPrice += ((Integer.parseInt(trunk4.price))*Integer.parseInt(number2));        sum3[2]=sumPrice;    }    sum3[3]=sum3[0]+sum3[1]+sum3[2];    System.out.print(sum3[3]);}

}

解决方案

不要滥用equals，整数比较用==号。