"Java" About removing spaces

The first thing to declare is that the trim () method, although everyone knows, but this thing is caught in the error of removing all the blanks, trim () can only remove the characters before and after the string, for the middle character cannot be processed.

If you want to remove all spaces, still use the ReplaceAll method, such as the following statement:

Space.replaceall ("\\s", "" ");

Using regular expressions, \\s first Find all the blanks, and then replace them directly,

It is also possible to write directly as follows, but it seems that in some places there is a very magical situation where there is no power:

Space.replaceall ("," "");

If you want to clear the extra space into a space, use the following method:

Space.replaceall ("\\s+", "" ");

The following + indicates that if a space is encountered, then everything after the match, that is, matches 1~x spaces,

Of course:

Space.replaceall ("+", "");

However, some cases still do not give force, in the regular expression of writing spaces, or written \\s, Standard point good.

At the same time note if Java EE programming, pay attention to pass over is not & nbsp;

In summary, such as the following procedures:

public class Clearspace {public static void main (string[] args) {String space= "s   SS S"; System.out.println (Space.trim ()); System.out.println (Space.replaceall ("+", "")); System.out.println (Space.replaceall ("\\s+", "")); System.out.println (Space.replaceall ("\\s", ""));}}

The operating result is:

Pay attention to the string after processing, re-assigned to the original string Oh!

"Java" About removing spaces