问题
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.
来源：https://stackoverflow.com/questions/31026144/remove-whitespaces-only-from-the-right-side-of-a-string