Detailed explanation of trim() method in java: The role of
trim() It is to remove the extra spaces at both ends of the string. Note that it is the spaces at both ends, and it will be removed no matter how many spaces there are at both ends. Of course, the spaces in the middle of
will not be removed, such as:
String s = " a s f g ";
String s1 = s.trim();
Then s1 is "a s f g", visible , which is the same as what was said above.
trim() can not only remove spaces, but also remove some other redundant symbols. These symbols are:
\t \n \v \ f \r \x0085 \x00a0 ? \u2028 \u2029
is translated as: horizontal tab character, line feed character, vertical tab character, page feed character, carriage return, and the following few Except for the question mark, everything else is written in the form of escape characters.
Extended information:
trim()The function removes blank characters or other predefined characters on both sides of a string.
Function removes spaces or other characters at the beginning and end of a string. When the function is successfully executed, it returns a string with the leading and trailing spaces of string removed. When an error occurs, it returns an empty string (""). If the value of any parameter is NULL, the Trim() function returns NULL.
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