打印出客户名称，身份证号，余额

Question

I am writing a Java program that I need:

A method to read the customer names and id and store them in an array. (Read a sequence of zero or more lines each containing the name and id of one customer. Instantiate one Customer object per line and store each object in an array of objects. The array need not be more than 10 elements long. The sequence of name and id will end with an empty line).

Main

import java.util.Scanner;

public class CustomerTest {
    public static void main(String[] args) {
        Customer[] customers = new Customer[10];
        Scanner myScanner = new Scanner(System.in);
        int numItem;
        readCustomer(myScanner, customers); //not sure about this calling
        readNameAmount(myScanner, customers); ////not sure about this calling
    }
    public static void readCustomer(Scanner myScanner, Customer[] input) {
        boolean streamEnded = false;
        int numItem = 0;
        while (!streamEnded && myScanner.hasNext()) {
            String name = myScanner.nextLine();
            String id = myScanner.nextLine();
            if (name.length() == 0 && id.length() == 0) {
                streamEnded = true;
            } else {
                input[numItem] = name; //error
                input[numItem] = id; //error
            }
            numItem++;
            Customer customerTest = new Customer(name, id);
        }
    }
    public static void readNameAmount(Scanner myScanner, Customer[] input) {
        while (myScanner.hasNext()) {
            String id = myScanner.nextLine();
            double amount = myScanner.nextDouble();
            int i = 0;
            boolean found = false;
            while (i <numItem && !found) { //error
                if (customers[i].equals(id)) { //error
                    changeBalance(double value);//error
                }
                found = true;
                i++;
            }
        }
    } 
    public static void print(Customer[] input, int numItem) {
        for (int i = 0; i < numItem; i++) {
            System.out.println(customers[i].toString()); //error
        }
    }
}

Answer 1

Can you please check if this works. I dont know whether I understood your question.And I just cleared the error.

public class CustomerTest {
static int numItem = 0;
public static void main(String[] args) {
    Customer[] customers = new Customer[10];
    Scanner myScanner = new Scanner(System.in);

    readCustomer(myScanner, customers); //not sure about this calling
    readNameAmount(myScanner, customers); ////not sure about this calling
}
public static void readCustomer(Scanner myScanner, Customer[] input) {
    boolean streamEnded = false;

    while (!streamEnded && myScanner.hasNext()) {
        String name = myScanner.nextLine();
        String id = myScanner.nextLine();
        if (name.length() == 0 && id.length() == 0) {
            streamEnded = true;
        } 
        else {
            input[numItem].getName();
            input[numItem].getId(); //error
        }
        numItem++;
        Customer customerTest = new Customer(name, id);
    }
}
public static void readNameAmount(Scanner myScanner, Customer[] input) {
    while (myScanner.hasNext()) {

        String id = myScanner.nextLine();
        Customer cust = new Customer();
        double amount = myScanner.nextDouble();
        int i = 0;
        boolean found = false;

        while (i < numItem && !found) { //error

            if (input[i].equals(id)) { //error
                cust.changeBalance(amount);//error
            }
            found = true;
            i++;
        }
    }
} 
public static void print(Customer[] input, int numItem) {

    for (int i = 0; i < numItem; i++) {

        System.out.println(input[i].toString()); //error
    }
}
}

Let me know your thoughts.

Customer.java

public class Customer {

    private String name;
    private String id;
    private double balance;

    public Customer(){

    }
    public Customer(String name, String id) {
        this.name = name;
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public String getId() {
        return id;
    }
    public void changeBalance(double value) {
        balance = balance + value;
    }
    public String toString() {
        return "name " + name + " id " + id + " balance " + balance;
    }
}