The following line would confuse the compiler because it would interpret the second quote as the end of the string System.out.println ("I said "Hello" to you."); An escape sequence is a series of characters that represents a special character An escape sequence begins with a backslash cha...
Escape Sequences (Java Enterprise in a Nutshell)David FlanaganJim Farley
第二个原因是,有些字符在ASCII字符集中没有定义,因此需要使用转义字符串来表示。 转义字符串的组成:转义字符串(Escape Sequence),即字符实体(Character Entity)分成三部分:第一部分是一个&符号,英文叫ampersand;第二部分是实体(Entity)名字或者是#加上实体(Entity)编号;第三部分是一个分号。 比如,要显示小于号(<...
How can I print a double quote inside a string using escape sequences? To print a double quote inside a string, you use the escape sequence for a double quote, which is usually a backslash followed by the double quote character itself. For example, "He said, \"Hello World!\"" would ...
// This will insert a single quote String str4 = "New\'Line"; System.out.println(str4); // This will insert a double quote String str5 = "New\''Line"; System.out.println(str5); } } Output: Frequently Asked Questions Q #1) How do you write an escape sequence in Java?
若出现:Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ )这样的问题,一般是转义字符的问题,下面是收集的网上解释: 根据Java Language Specification 的要求,Java 源代码的字符串中的反斜线被解释为Unicode 转义或其他字符转义。因此必须在字符串字面值中使用两个反斜线,表示正则表达式受...
若出现:Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ )这样的问题,一般是转义字符的问题,下面是收集的网上解释: 根据Java Language Specification 的要求,Java 源代码的字符串中的反斜线被解释为Unicode 转义或其他字符转义。因此必须在字符串字面值中使用两个反斜线,表示正则表达式受...
字符串中的"\"要使用"\\"来转译，一个\带表的是转译字符的开始
把你的里面的\全部替换为\\即可 String reg = "(^[0-9]{3,4}\\-[0-9]{3,8}$)|(^[0-9]{3,8}$)|(^\\([0-9]{3,4}\\)[0-9]{3,8}$)|(^0{0,1}13[0-9]{9}$)";String s = "13942000603";System.out.println(s.matches(reg));这样匹配不是更快么？
The single quote escape sequence (') is used to insert a single quote character.#include int main() { printf("This is a single quote: \'Hello\'"); return 0; } Output:This is a single quote: 'Hello' Double Quote ("):A double quotation character is inserted using the double quote ...