Java 在类之间传递带有getter和setter的userInput

我的getter返回null。我试图收集用户输入并将其发送到另一个类，通过使用getter和setter来显示。在ClientInput类中，我收集用户输入，并使用setter将客户机类中用户输入的值分配给实例变量。然后，我希望从ClientCalculations类中访问实例变量的值。当我尝试创建一个新实例时，它会给我一个空值。如何从另一个类中获取使用userinput设置的值？希望我能理解我是java新手

public class Client{
    //Instance variables for client information
    private String ClientName;
    private String ClientLawnWidth;
    private String ClientLawnLength;
    private String ClientPaymentMethod;
    private String ClientQuestion;

    /*
    *Getter and setter for Client name
    *
    *
    */

    public void setName(String ClientName) {
        this.ClientName = ClientName;
    }
    public String getName() {
        return ClientName;
    }

    /*
    *Getter and setter for Client name
    *
    *
    */

    public void setClientLawnWidth(String ClientLawnWidth) {
        this.ClientLawnWidth = ClientLawnWidth;
    }
    public String getClientLawnWidth() {

        return ClientLawnWidth;
    }
    /*
    *Getter and setter for Client name
    *
    *
    */

    public void setClientLawnLength(String ClientLawnLength) {
        this.ClientLawnLength = ClientLawnLength;
    }

    public String getClientLawnLength() {
        return ClientLawnLength;

    }

    /*
    *Getter and setter for Client Payment Method
    *
    *
    */

    public void setClientPaymentMethod(String ClientPaymentMethod) {
        this.ClientPaymentMethod = ClientPaymentMethod;
    }

    public String getClientPaymentMethod() {
        return ClientPaymentMethod;
    }       

    /*
    *Getter and setter for Client Question
    *
    *
    */

    public void setClientQuestion(String ClientQuestion) {
        this.ClientQuestion = ClientQuestion;
    }

    public String getClientQuestion() {
        return ClientQuestion;
    }       

    public String display() {
        return "Client Name: " + getName()
                + "\n Client Lawn Width: " + getClientLawnWidth()
                + "\n Client Payment Method: " + getClientPaymentMethod();
    }
}

public class ClientInput {
    private  ArrayList<Client>    Clients;
    private  InputHelper  input;

    public void run() {
    clientDataEntry();
    displayClients();
    }

    public void clientDataEntry() { 
    String ClientName = ""; 
    String ClientLawnWidth = "";    
    String ClientLawnLength = "";   
    String ClientPaymentMethod = "";    
    String ClientQuestion = ""; 
    String  more          = "";
    Client     newClient        = null;
    Clients = new ArrayList();

    while (true) {
            input = new InputHelper();
            ClientName = input.getUserInput(
                    "Enter the name of The Client");
            ClientLawnWidth = input.getUserInput(
                    "Enter the width of clients lawn in yards");
            ClientLawnLength = input.getUserInput(
                    "Enter the length of clients lawn in yards");
            ClientPaymentMethod = input.getUserInput(
                    "Enter your payment method, 1,2,or 22 payments");
            newClient = new Client();
            newClient.setName(ClientName);
            newClient.setClientLawnWidth(ClientLawnWidth);
            newClient.setClientLawnLength(ClientLawnLength);
            newClient.setClientPaymentMethod(ClientPaymentMethod);
            Clients.add(newClient);
            more = input.getUserInput(
                    "Would you like to enter another?");
            if (!more.equals("y")) {
                break;
            }
        }
    }
        public void displayClients() {
        Client  client  = null;
        for (int i = 0; i < Clients.size(); i++) {
            client = (Client) Clients.get(i);
            System.out.println(client.display());
            System.out.println();
        }
    }
 }

public class ClientCalculations {
    private String name; 
    private int servicChargeFee;
    public void display() {
    Client client = new Client();
    System.out.print(client.getName());
    }
}

公共类客户端{
//客户端信息的实例变量
私有字符串ClientName；
私有字符串ClientLawnWidth；
私有字符串ClientLawnLength；
私有字符串ClientPaymentMethod；
私有字符串客户端问题；
/*
*客户端名称的Getter和setter
*
*
*/
public void setName（字符串ClientName）{
this.ClientName=ClientName；
}
公共字符串getName（）{
返回ClientName；
}
/*
*客户端名称的Getter和setter
*
*
*/
public void setClientLawnWidth（字符串ClientLawnWidth）{
this.ClientLawnWidth=ClientLawnWidth；
}
公共字符串getClientLawnWidth（）{
返回ClientLawnWidth；
}
/*
*客户端名称的Getter和setter
*
*
*/
public void setClientLawnLength（字符串ClientLawnLength）{
this.ClientLawnLength=ClientLawnLength；
}
公共字符串getClientLawnLength（）{
returnclientlawnlength；
}
/*
*客户支付方法的Getter和setter
*
*
*/
public void setClientPaymentMethod（字符串ClientPaymentMethod）{
this.ClientPaymentMethod=ClientPaymentMethod；
}
公共字符串getClientPaymentMethod（）{
returnclientpaymentmethod；
}       
/*
*客户问题的Getter和setter
*
*
*/
public void setClientQuestion（字符串ClientQuestion）{
this.ClientQuestion=ClientQuestion；
}
公共字符串getClientQuestion（）{
返回客户问题；
}       
公共字符串显示（）{
返回“客户端名称：”+getName（）
+“\n客户端草坪宽度：”+getClientLawnWidth（）
+“\n客户端付款方式：”+getClientPaymentMethod（）；
}
}
公共类客户端输入{
私人ArrayList客户；
私有InputHelper输入；
公开募捐{
clientDataEntry（）；
显示客户端（）；
}
public void clientDataEntry（）{
字符串ClientName=“”；
字符串ClientLawnWidth=“”；
字符串ClientLawnLength=“”；
字符串ClientPaymentMethod=“”；
字符串ClientQuestion=“”；
字符串more=“”；
Client newClient=null；
Clients=newarraylist（）；
while（true）{
输入=新的InputHelper（）；
ClientName=input.getUserInput(
“输入客户名称”）；
ClientLawnWidth=input.getUserInput(
“输入客户草坪的宽度（以码为单位”）；
ClientLawnLength=input.getUserInput(
“输入客户草坪的长度（以码为单位”）；
ClientPaymentMethod=input.getUserInput(
“输入您的付款方式，1、2或22次付款”）；
newClient=newClient（）；
newClient.setName（ClientName）；
setClientLawnWidth（ClientLawnWidth）；
newClient.setClientLawnLength（ClientLawnLength）；
setClientPaymentMethod（ClientPaymentMethod）；
Clients.add（newClient）；
more=input.getUserInput(
“您想再输入一个吗？”）；
如果（！more.equals（“y”））{
打破
}
}
}
公共客户机（）{
Client=null；
对于（int i=0；i

在哪里初始化即时变量？ 在getter开始工作之后，您可以在构造函数的帮助下初始化实例变量。 例如：

 class Client {
        private String name;

        // constructor 
        Client(String name) {
            this.name = name;
        }

        // getter
        public String getName() {
            return this.name;
        }
        // setter
        public void setName(String name) {
            this.name = name;   
        }
}

public class Main {
        public static void main(String[] args) {
            // instance of client class
            Client client = new Client("Client Name");
            System.out.println(client.getName());               
        }
}

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错误发生在哪里？你在用如此复杂的方式做简单的事情。。。