Question

我的目标是建立一个程序，要求所有相关信息来创建发票。如果用户希望添加另一个产品/服务，程序将循环并且阵列将递增，以便输出将提供所有产品的描述和价格。运行此代码时，当我尝试添加产品说明时出现此错误：

线程中的异常＆＃34; main＆＃34; java.lang.ArrayIndexOutOfBoundsException：1

我希望我能清楚地解释我的问题。

import cs1.Keyboard;

public class Invoice_Obj{

    // This object creates an invoice

    public void invoice(){

        char answer;
        int descnum = 1;
        int pricenum = 1;

        System.out.print("Enter invoice #\t\t: ");
        String invoicenum = Keyboard.readString(); //user inputs the invoice number

        System.out.print("Enter Date\t\t: ");
        String date = Keyboard.readString(); //user inputs the date of the invoice

        System.out.print("Who is this invoice to? : ");
        String recipient = Keyboard.readString(); //user inputs the recipient of the invoice

        do{

        System.out.print("\nDescription of service or product : ");
        String[] description = new String[descnum];
        description[descnum++] = Keyboard.readString();

        System.out.print("\nTotal price of service or product : ");
        String[] price = new String[pricenum];
        price[pricenum++] = Keyboard.readString();

        System.out.print("Add another service/product? (Y/N) : ");
        answer = Keyboard.readChar();


        }while(answer=='Y' || answer=='y');

    }

}

Answer 1

您正在初始化String[] description = new String[descnum];

根据您的代码，您已初始化descnum = 1，因此它将创建一个大小为1的数组，并且您尝试访问description[descnum++] = Keyboard.readString();，即超出初始化数组的范围

尝试将description[descnum++] = Keyboard.readString();更改为description[0] = Keyboard.readString();

或增加数组的大小

如何在循环中使用数组并具有多个输出

1 个答案: