Question

我正在尝试创建一个双字符串。我认为这是分配价值的一种方式。我知道有更好的方法，但我老师建议这样做。但是，当我把它放进去时，每个人都会收到错误说明：

无法找到符号cellPhoneNumbers ']'预计

最终我要做的是创建一个看起来像这样的图表

智利 ******* 瑞典 * 秘鲁 ***************

public class GraphNumbers
{
    String[][] cellPhoneNumbers = new String[5][1];
    cellPhoneNumbers[0][0] = "Chile";
    cellPhoneNumbers[0][1] = "21";
    cellPhoneNumbers[1][0] = "Sweden";
    cellPhoneNumbers[1][1] = "11";
    cellPhoneNumbers[2][0] = "Peru";
    cellPhoneNumbers[2][1] = "33";
    cellPhoneNumbers[3][0] = "Bulgaria";
    cellPhoneNumbers[3][1] = "10";
    cellPhoneNumbers[4][0] = "Guatemala";
    cellPhoneNumbers[4][1] = "18";

}

为什么我收到此消息？

Answer 1

某些代码必须放在方法中，例如：

public class GraphNumbers
{
    //changed the size of the array so you could do what you want
    //you must have had a misscount when you originally made it
    String[][] cellPhoneNumbers = new String[5][2];

    //put in constructor or another appropriately named method
    public GraphNumbers()
    {
        cellPhoneNumbers[0][0] = "Chile";
        cellPhoneNumbers[0][1] = "21";
        cellPhoneNumbers[1][0] = "Sweden";
        cellPhoneNumbers[1][1] = "11";
        cellPhoneNumbers[2][0] = "Peru";
        cellPhoneNumbers[2][1] = "33";
        cellPhoneNumbers[3][0] = "Bulgaria";
        cellPhoneNumbers[3][1] = "10";
        cellPhoneNumbers[4][0] = "Guatemala";
        cellPhoneNumbers[4][1] = "18";
    }
}

Answer 2

根据Java语言语法，您不能在类中放置可执行语句。那些应放在方法/构造函数/代码块中。

所以你需要移动这些陈述：

cellPhoneNumbers[0][0] = "Chile";
cellPhoneNumbers[0][1] = "21";
cellPhoneNumbers[1][0] = "Sweden";
cellPhoneNumbers[1][1] = "11";
cellPhoneNumbers[2][0] = "Peru";
cellPhoneNumbers[2][1] = "33";
cellPhoneNumbers[3][0] = "Bulgaria";
cellPhoneNumbers[3][1] = "10";
cellPhoneNumbers[4][0] = "Guatemala";
cellPhoneNumbers[4][1] = "18";

到适当的地方，也许是在构造函数中。

此外，您的代码会在雄蕊中溢出数组，例如：

cellPhoneNumbers[0][1] = "21";

所以你需要第二个数组的大小为2而不是1.改变这个

String[][] cellPhoneNumbers = new String[5][1];

到

String[][] cellPhoneNumbers = new String[5][2];

错误信息找不到符号？

2 个答案: