下面的哪些程序段可能导致错误 () Ⅰ: String s = "Gone with the wind";String t = "good ";String k = s + t; Ⅱ: String s = "Gone with the wind";String t;t = s[3] + "one"; Ⅲ: String s = "Gone with the wind";String stand
单选题
下面的哪些程序段可能导致错误 () Ⅰ: String s = "Gone with the wind";String t = "good ";String k = s + t; Ⅱ: String s = "Gone with the wind";String t;t = s[3] + "one"; Ⅲ: String s = "Gone with the wind";String stand