length则指明了bytes[]数组的长度,类型为u2。同样是在《Java虚拟机规范》中可以找到对u2的定义: u2表示两个字节的无符号数,1个字节有8位,2个字节就有16位。因此,u2可表示的最大值为2^16 - 1= 65535。 到这里,已经得出了第二个限制,也就是Class文件中常量池的格式规定了,其字符串常量的长度不能超过
String(byte[]bytes,int offset,int length)通过使用平台的默认字符集解码指定的 byte 子数组,构造一个新的 String。String(byte[]bytes,int offset,int length,Charset charset)通过使用指定的 charset 解码指定的 byte 子数组,构造一个新的 String。String(byte[]bytes,int offset,int length,String charsetName)...
(1)求字符串长度length() 调用length()方法的语法格式如下: 字符串.length() length()方法返回字符串的长度。 示例一:注册新用户,要求密码长度不能小于6位。 代码展示: import java.util.Scanner; public class Register { public static void main(String[] args) { Scanner sc = new Scanner(System.in); ...
/** * Returns the length of this string. * The length is equal to the number ofUnicode * code unitsin the string. * * @return the length of the sequence of characters represented by this * object. */public int length() { return value.length;} 1. 这里文档并没有说明最大长度是多少,...
length item of the CONSTANTUtf8info structure (§4.4.7). Note that the limit is on the number of bytes in the encoding and not on the number of encoded characters. UTF-8 encodes some characters using two or three bytes. Thus, strings incorporating multibyte characters are further constrained...
= woman + ZWJ + woman + ZWJ + girl + ZWJ + boy family ==> "" jshell> family.length(...
This function is used to return the length of a string.Similar function: lengthb. The lengthb function is used to return the length of string str in bytes and return a va
length item of the CONSTANTUtf8info structure (§4.4.7). Note that the limit is on the number of bytes in the encoding and not on the number of encoded characters. UTF-8 encodes some characters using two or three bytes. Thus, strings incorporating multibyte characters are further constrained...
(bytes, 0, bytes.Length); int nChars = decoder8.GetCharCount(bytes, 0, nBytes); char[] chars = new char[nChars]; nChars = decoder8.GetChars(bytes, 0, nBytes, chars, 0); output += new String(chars, 0, nChars); } return output; } } // The example displays the following ...
The length of the new String is a function of the charset, and hence may not be equal to the length of the byte array. The behavior of this constructor when the given bytes are not valid in the given charset is unspecified. The CharsetDecoder class should be used when more control ...