这个java程序为什么不能输出结果？

Question

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<Passenger> car1;

public ArrayList<PickUp> car2;

public ArrayList<Trunk> car3;

public Set<Passenger> set1;

public Set<PickUp> set2;

public Set<Trunk> 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]);

}

}

Answer 1

亲，代码没贴全呀。~~

Answer 2

自己多研究研究、自己用断点调调、找找问题、改改问题、这样的学习更加有效果！找问题也是另一种学习！！

Answer 3

真的希望有人能回答。不是让我自己研究，这段代码我已经看了很长时间就是不明白。