阅读下面程序 public class ConcatTest{ public
题型:单项选择题
问题:
阅读下面程序 public class ConcatTest{ public static void main(String[] args) { String strl = "abc"; String str2 = "ABC"; String str3 = str1.concat(str2); System.out.println(str3);} } 程序的运行结果是:
A.abe
B.ABC
C.abcABC
D.ABCabc