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Example: Program to Remove All Whitespaces
fun main(args: Array<String>) {
var sentence = "T his is b ett er."
println("Original sentence: $sentence")
sentence = sentence.replace("\\s".toRegex(), "")
println("After replacement: $sentence")
}运行程序后，输出将是
Original sentence: T his is b ett er. After replacement: Thisisbetter.
In the above program, we use String's replace() method to remove and replace the whitespaces in the string sentence.
We've used regular expression \\s that finds all white space characters (tabs, spaces, new line character, etc.) in the string. Then, we replace it with "" (empty string literal).
Here's the equivalent Java code: Java program to remove all whitespaces