Find all numbers in the String [closed]

by

Use replaceAll:

String str = "qwerty1qwerty2";      
str = str.replaceAll("[^0-9]+", " ");
System.out.println(Arrays.asList(str.trim().split(" ")));

Output:

[1, 2]

[EDIT]

If you want to include - a.e minus, add -?:

String str = "qwerty-1qwerty-2 455 f0gfg 4";      
str = str.replaceAll("[^-?0-9]+", " "); 
System.out.println(Arrays.asList(str.trim().split(" ")));

Output:

[-1, -2, 455, 0, 4]

Description

[^-?0-9]+
  • + Between one and unlimited times, as many times as possible, giving back as needed
  • -? One of the characters “-?”
  • 0-9 A character in the range between “0” and “9”

More Related Contents:

  1. How to approach this hackerrank puzzle?
  2. Why does Java’s hashCode() in String use 31 as a multiplier?
  3. Sort on a string that may contain a number
  4. What’s the best way to build a string of delimited items in Java?
  5. How to check if two words are anagrams
  6. Fast algorithm for searching for substrings in a string
  7. How to find all permutations of a given word in a given text?
  8. How do I split strings in J2ME?
  9. StringBuilder vs String concatenation in toString() in Java
  10. How do I convert from int to String?
  11. Obtaining a powerset of a set in Java
  12. How to split a comma-separated string?
  13. length and length() in Java
  14. How to format a Java string with leading zero?
  15. Convert array of strings into a string in Java
  16. Should I use string.isEmpty() or “”.equals(string)?
  17. How to insert a character in a string at a certain position?
  18. Understanding logic in CaseInsensitiveComparator
  19. How to shuffle characters in a string without using Collections.shuffle(…)?
  20. Closing a Scanner throws java.util.NoSuchElementException
  21. Is conversion to String using (“” + ) bad practice?
  22. How to count possible combination for coin problem
  23. Java split is eating my characters
  24. Java. Ignore accents when comparing strings
  25. How can I left-align strings using String.format()?
  26. Case insensitive matching in Java switch-case statement
  27. Is it possible in Java to override ‘toString’ for an Objects array?
  28. Can we access or query the Java String intern (constant) pool?
  29. Extract digits from string – StringUtils Java
  30. Example of O(n!)?

Leave a Comment