Several ways to remove all spaces in a string in Java _java

Remove spaces in Java

1. String.Trim ()

Trim () is to remove the trailing space

2.str.replace ("", ""); Remove all spaces, including end to end, middle

Copy Code code as follows:

String str = "Hell o";
String str2 = Str.replaceall ("", "");
System.out.println (STR2);

3. or ReplaceAll ("+", ""); Remove all spaces

4.str =. ReplaceAll ("\\s*", "");
can replace most whitespace characters, not limited to spaces
\s can match spaces, tabs, page breaks, and any of the white space characters.