Whitespace Matching Regex - Java

In Java, you can use the following regular expression to match any amount of whitespace:

"\\s+"

This regular expression uses the \s character class, which matches any whitespace character (such as a space, tab, or newline). The + quantifier indicates that one or more whitespace characters should be matched.

Here is an example of how to use this regular expression to split a string on whitespace:

String input = "Hello    World";
String[] words = input.split("\\s+");

This will split the string on any amount of consecutive whitespace, resulting in the following array:

["Hello", "World"]

You can also use this regular expression to search for whitespace in a string or to replace whitespace with another string.

For example, to replace all whitespace in a string with a single space, you can use the following code:

String input = "Hello    World";
String output = input.replaceAll("\\s+", " ");

This will replace all consecutive whitespace with a single space, resulting in the following string:

"Hello World"

You can use a similar regular expression to match any amount of whitespace in other programming languages that support regular expressions, such as Python and JavaScript.