Split using (.) except to numbers-CodePudding

I need to separate a sentence using (.) However, I came across numbers. How can I define a split(.) excluding points that are between numbers?

Example:

"I paid 1.000 dollars. Very expensive. But I think today it should be cheaper."

I got this:

I paid 1.
000 dollars.
Very expensive.
But I think today it should be cheaper.

But I need this:

I paid 1.000 dollars.
Very expensive.
But I think today it should be cheaper.

CodePudding user response：

Using the regex from this answer, you can do the following:

    public static String[] split(String str) {
        return str.split("[\\.\\!] (?!\\d)\\s*|\\n \\s*");
    }

The result:

I paid 1.000 dollars
Very expensive
But I think today it should be cheaper

regex101.com

CodePudding user response：

Just use negativa lookarounds:

String textToParse = "I paid 1.000 dollars. Very expensive. But I think today it should be cheaper.";
String[] chunks = textToParse.split("(?<!\\d)\\.(?!\\d)");
for(int i = 0; i < chunks.length; i  ){
    System.out.println(chunks[i].trim());
}

Explanation:

i used negativa lookahead, which asserts that what follows is not matching pattern specified, so (?!\d) assuers that we will match, if text is NOT followed by any digit \d.

I also used negativa loookbehind, but it's totally equivalent to above, but just look what preceeds the text, not what follows. So in a same manner, we just assure what is before is not a digit.