我有一个类级别的2d字符串数组，我想初始化它。以下是我的代码
public static String[][] SBox ={
"63","7c"," 77" ,"7b", "f2", "6b", "6f" ,"c5" ,"30" ,"01", "67", "2b", "fe", "d7", "ab", "76",
"ca", "82", "c9", "7d", "fa", "59", "47", "f0" ,"ad" ,"d4" ,"a2", "af", "9c" ,"a4" ,"72" ,"c0" };
但它一直返回错误：“String无法转换为String []”