How do I insert a word if the string has more than one space in Java?

Question

I have the following code,

String s = "    Hello I'm a       multi spaced String"

In string s, there are multiple (indeterminate) spaces; but, I need to print it as %temp%Hello I'm a%temp%multi spaced String

How can I do this?

Answer 1

Use regex \s{2,} and replaceAll() method like this:

s.replaceAll("\\s{2,}","%temp%");

Output

%temp%Hello I'm a%temp%multi spaced String

Code

public class HelloWorld
{
  public static void main(String[] args)
  {
    String s = "    Hello I'm a       multi spaced String";
    s = s.replaceAll("\\s{2,}","%temp%");
    System.out.println(s);
  }
}

Answer 2

You can use a regular expression like \s\s+ which matches a white space followed by one or more additional whitespaces. Something like,

String s = "    Hello I'm a       multi spaced String";
s = s.replaceAll("\\s\\s+", "%temp%");
System.out.println(s);

Outputs (as requested)

%temp%Hello I'm a%temp%multi spaced String