Splitting a space separated string

Question

String numbers = \"5 1 5 1\";

So, is it:

String [] splitNumbers = numbers.split();

or:

String [] spli         


        

Answer 1

You must escape the regex with an additional \ since \ denotes the escape character:

public static void main(String[] args) {
    String numbers = "5 1 5 1";
    String[] tokens = numbers.split("\\s+");
    for(String token:tokens){
        System.out.println(token);
    }
}

So the additional \ escapes the next \ which is then treated as the literal \.

When using \\s+ the String will be split on multiple whitespace characters (space, tab, etc).