How can I find whitespace in a String?

by

For checking if a string contains whitespace use a Matcher and call its find method.

Pattern pattern = Pattern.compile("\\s");
Matcher matcher = pattern.matcher(s);
boolean found = matcher.find();

If you want to check if it only consists of whitespace then you can use String.matches:

boolean isWhitespace = s.matches("^\\s*$");

More Related Contents:

  1. Java: splitting a comma-separated string but ignoring commas in quotes
  2. How do I convert from int to String?
  3. String’s Maximum length in Java – calling length() method
  4. How to convert comma-separated String to List?
  5. Java how to replace 2 or more spaces with single space in string and delete leading and trailing spaces
  6. Concatenating null strings in Java [duplicate]
  7. String Constant Pool
  8. How to split a comma-separated string?
  9. Java, Calculate the number of days between two dates [duplicate]
  10. Convert array of strings into a string in Java
  11. Should I use string.isEmpty() or “”.equals(string)?
  12. Convert seconds value to hours minutes seconds?
  13. Understanding logic in CaseInsensitiveComparator
  14. Convert String to int array in java
  15. How to shuffle characters in a string without using Collections.shuffle(…)?
  16. Copying to the clipboard in Java [duplicate]
  17. Performance penalty of String.intern()
  18. Can I get an enum based on the value of its field?
  19. How do I convert a byte array with null terminating character to a String in Java?
  20. Android coding with switch (String)
  21. What is the difference between String and StringBuffer in Java?
  22. How to remove large if-else-if chain [duplicate]
  23. Java – checking if parseInt throws exception
  24. Find all numbers in the String [closed]
  25. How to parse this string in Java?
  26. Is it possible in Java to override ‘toString’ for an Objects array?
  27. Sorting ArrayList of Objects by Object attribute
  28. Java: how to initialize String[]?
  29. Parse Date from String in this format : dd/MM/yyyy [to dd/MM/yyyy]
  30. How many Java objects are generated by this – new String(“abcd”)

Leave a Comment