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我有一个包含整数的二维字符串数组。

当我要求用户添加包含字符串和整数的元素时,程序会显示用户添加的内容 - 但它被替换为null.

这是代码:

     case 3:
            count++;

            System.out.println("Enter the type of the car: ");
            car[count][0] = ky.next();

            System.out.println("Enter the model of the car: ");
            String addM = ky.next();    // integer
            car[count][1] = addM;

            System.out.println("Enter the price of the car: ");
            String addP = ky.next();    // integer
            car[count][1] = addP;


            System.out.println("Enter the condition of the car: ");
            String addC = ky.next();
            car[count][3] = addC;

            System.out.println("Enter the odemeter of the car (if it is new put it 0): ");
            String addO = ky.next(); // integer
            car[count][1] = addO1;

            income -= Integer.parseInt(addP);




                break;

这就是程序显示的:

Ford    2012  55000  new      0  
Toyota  2012  60000  new      0  
Honda   2011  25000  Used  6000  
null    null  null   null  null  

最后一行是用户应该添加的数据!

非常感谢您的帮助。

4

1 回答 1

1

DRY := 不要重复自己:

String [] attribute = new String [] {"type", "model", "price", "condition", "odemeter"}; 
for (int i = 0; i < attribute.length; ++i)
{
        System.out.println ("Enter the "+attribute[i] +" of the car: ");
        car[count][i] = ky.nextInt ();
}

如果属性真的是一个int,而ky是keyboard的缩写,是System.in上的一个Scanner,使用ky.nextInt();

于 2012-05-11T00:57:50.040 回答