How do I remove trailing whitespace using a regular expression?

Question

I want to remove trailing white spaces and tabs from my code without removing empty lines.

I tried:

\\s+$

and:

([^\\n]         


        

Answer 1

In Java:

String str = "    hello world  ";

// prints "hello world" 
System.out.println(str.replaceAll("^(\\s+)|(\\s+)$", ""));