There is a string, it contains numbers, say, a password - 450. How to get this number? The string may contain Russian text.

  • That is, the line is not only one number, but something else? - angry

4 answers 4

If you know the structure of the string, you can use regular expressions .

  • /(\d+)/ =) - Sh4dow

 import java.util.regex.*; Pattern pat=Pattern.compile("[-]?[0-9]+(.[0-9]+)?"); Matcher matcher=pat.matcher("45.5saf -fg123 -18+"); while (matcher.find()) { System.out.println(matcher.group()); };
So you can get all the numbers from the string.
The result of this example is 45.5; 123; -18.

  • @ReinRaus, yes, your code is better. - angry
  • one
    Regular expression is not correct) for example 44..1 - timka_s
  • Thanks, corrected. - ReinRaus

This code will find all the numbers in the string:

  Pattern pattern = Pattern.compile("\\d+"); String word = "test123test444test"; // мой пример строки Matcher matcher = pattern.matcher(word); int start = 0; while (matcher.find(start)) { String value = word.substring(matcher.start(), matcher.end()); int result = Integer.parseInt(value); System.out.println(result); start = matcher.end(); } 
     String s1 ="пароль - 450"; String s2 = s1.split("\\\D+"); //s2 - символьный массив всех числовых вхождений.

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