How to escape in java

Java method of escaping: Add "\" before the character that needs to be escaped to escape, so that the character has different semantics than when the character appears alone; for example: "\0 " represents a null character, "\t" represents a horizontal tab, "\n" represents a line feed, "\r" represents a carriage return, "\b" represents a backspace, and so on.

1. Common escape characters

The English corresponding to the transfer character is escape character, escape string (Escape Sequence).

Add a slash "\" in front of the letters to represent common ASCII characters that cannot be displayed, called escape characters. Such as \0, \t, \n, etc., are called escape characters, because the following characters are not their original ASCII character meanings.

All escape characters and their corresponding meanings:

Note: Distinguish between slash: "/" and backslash: "\" , not interchangeable here.

2. / slash and \backslash

① / slash, slash or also called forward slash (forward slash), originally a punctuation mark . It originated in ancient Rome and was used as a comma in the Middle Ages (at that time, the double slash // was used as a hyphen, and later evolved into the equal sign =).

(a) The slash in English is the most commonly used substitution character "or" to indicate selection, such as: Yes/No; and to avoid name conflicts, such as "" in the U.S. census table Assyrian/Chaldean/Syriac" is to avoid conflicts or ambiguities caused by different names of Syriana. It actually also means or.

(b) Arithmetic; It is called over in English, for example: 123/456, which is a fraction.

(c) Money representation. $50/- represents the upper limit of $50, and there is no more after it to prevent anyone from adding modifications.

(d) Representation of date.

② \ backslash, backslash, is mainly used in computers, and is also a reference to normal/slash. Operating systems (xNix), computer languages ​​(C/C, Perl), coding (part of Unicode), etc. all use it.

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