Remove whitespaces only from the right side of a S

问题:

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• What is a good alternative of LTRIM and RTRIM in Java? 5 answers

I have a String printerName; which is 256 characters long. I need to remove whitespaces from right side of the String so that I get only a valid printer name.

This solution:

st.replaceAll("\\s+","")

doesn't work, because a valid printerName can have a whitespaces. And I don't know how many characters I have to delete, becouse there can be many printers. What's the best solution for this?

回答1:

If you only want to remove the spaces on the right (but not on the left) you can use:

st.replaceAll("\\s+$", "");

The $ anchor meaning the end of the string.

If you don't mind removing spaces at the beginning of the string as well, then:

st.trim()

will do the trick.