Remove special characters in the string in java?

Question

How to remove special characters in the string except \"- _\". Now I use:

replaceAll(\"[^\\\\w\\\\s]\", \"\")

it remove all special charact

Answer 1

barely 6 years have passed and we have a lambda solution

String str = "owl@134_- abc";
str.codePoints().mapToObj( Character::toChars ).filter(
    a -> (a.length == 1 && (Character.isLetterOrDigit( a[0] ) || a[0] == '-' || a[0] == '_')) )
  .collect( StringBuilder::new, StringBuilder::append, StringBuilder::append ).toString(); // owl134_-abc