Remove all empty lines

Question

I thought that wasn\'t that hard to do, but I want to remove all empty lines (or lines just containing blanks and tabs in Java) with String.replaceAll.

My regex look

Answer 1

You can remove empty lines from your code using the following code:

String test = plainTextWithEmptyLines.replaceAll("[\\\r\\\n]+","");

Here, plainTextWithEmptyLines denotes the string having the empty lines. [\\\r\\\n] is the regex pattern which is used to identify empty line breaks.