Or, slightly more verbose, but less regexy: text = text.replaceAll('\r', '').Modern Linux desktops have come a long way in regards to letting you manipulate files on your system. If you want to make sure you remove any line separators, you can do it like this: text = text.replaceAll('\r| If you want to remove only line terminators that are valid on the current OS, you could do this: text = text.replaceAll(System.getProperty('parator'), '') Not exactly what the original question asked for, but likely to do exactly what is needed in many cases: import 3.StringUtils įinal String cleansedString = StringUtils.normalizeSpace(rawString) This function normalizes down all whitespace, including line breaks, to single spaces. The sequence represents a single (Windows) line terminator, so we need to be careful not to replace it with two spaces. Since Java 8 you can also do this: // #5Īnd if you want to replace multiple line terminator with one space: // #6ġ - Note there is a subtle difference between #3 and #4. Which replaces each line terminator with a space 1. So you might actually want to do this: // #4 However, if the input file is text, this will concatenate words e.g. Removes all Windows, UNIX or Mac line terminators. This does not cope with the case where you are trying to process (for example) a UNIX file on Windows, or vice versa. Removes all line terminators for the current platform. Text = text.replace(System.getProperty('parator'), '') This does not cope with Windows or Mac line terminations. Simply removes all the newline characters. Which one is most correct depends on what exactly you are trying to do. But your code then throws away that String.

(It can't - Java strings are immutable!) What replace actually does is to create and return a new String object with the characters changed as required. If you don't assign the result to text, then that new String is lost and garbage collected.Īs for getting the newline String for any environment - that is available by calling System.getProperty('parator').Īs noted in other answers, your code is not working primarily because String.replace(.) does not change the target String. This is necessary because Strings are immutable - calling replace doesn't change the original String, it returns a new one that's been changed. You need to set text to the results of text.replace(): String text = readFileAsString('textfile.txt')

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