java - 错误信息找不到符号？

Question

我正在尝试创建一个双字符串。我认为这是分配值的一种方法。我知道有更好的方法，但我的老师建议这样做。但是，当我将其放入时，我会收到每个错误，其中指出:

找不到符号 cellPhoneNumbers预计为“]”

最终我想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";

}

为什么我会收到此消息？

Answer 1

某些代码必须放置在方法中，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    //you must have had a misscount when you originally made it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";
    }
}