java字符串的長度怎求呢String?
public class Test { public static void main(String[] args) { String str = "abcd"; String[] arrStr = {"a","b","c","d"}; System.out.println(str.length()); System.out.println(..
java字符串的長度怎求呢String?
public class Test { public static void main(String[] args) { String str = "abcd"; String[] arrStr = {"a","b","c","d"}; System.out.println(str.length()); System.out.println(..