extract numbers from string java

Question

I am trying to extract the numbers from the following string:

(1234-5869)|990-9797

I want all the numbers present in that string like

If you say "I'm trying", you must have some code that does not work for you. Please add it to the question and explain what is wrong with it. — Wiktor Stribiżew, May 15 '18 at 09:21
`Integer[] result = Arrays.stream("1234-5869)|990-9797".split("\\D")).filter(s->!s.isEmpty()).map(Integer::valueOf).toArray(Integer[]::new);` — Youcef LAIDANI, May 15 '18 at 09:59

score 0 · Answer 1 · answered May 18 '18 at 11:50

in your case you don't need any regex. You need to split your string. look at this topic : How to split a string in Java

or if you want to make it without split you can replace all spetial caractere by a a blank space and then use a stringTokenizer like this :

String str = "(1234-5869)|990-9797";
str = str.replaceAll("\\D", " ")); // " 1234 5869  990 9797"

StringTokenizer st = new StringTokenizer(str);
while (st.hasMoreTokens()) {
     System.out.println(st.nextToken());
}

your answer will appear with the presentation you want

score -1 · Answer 2 · edited May 15 '18 at 13:16

result==> String

String string="(1234-5869)|990-9797";
String onlyNumber= string.replaceAll("[^0-9]", "");
System.out.println("result==>"onlyNumber);

result ==> array

String string="(1234-5869)|990-9797";
String normalizedString= string.replaceAll("[^0-9]", ",");
System.out.println(normalizedString);
StringTokenizer st = new StringTokenizer(normalizedString, ",");
List<String> tabNumber= new ArrayList<String>();
while (st.hasMoreElements()) {
    tabNumber.add((String) st.nextElement());
}

score -1 · Answer 3 · answered May 15 '18 at 10:06

Use replaceAll.

String str = "(1234-5869)|990-9797";

System.out.println(str.replaceAll("\\D", " ")); // " 1234 5869  990 9797"

To get them into an array:

String[] arr = str.split("\\D");

System.out.println(Arrays.toString(arr)); // [, 1234, 5869, , 990, 9797]

You can then make them into a string with a loop and a StringBuilder or something similar, and trim off any empty values.

extract numbers from string java

3 Answers3