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How to extract multiple integers from a String in Java?
Let’s say the following is our string with integer and characters −
String str = "(29, 12; 29, ) (45, 67; 78, 80)";
Now, to extract integers, we will be using the following pattern −
\d
We have set it with Pattern class −
Matcher matcher = Pattern.compile("\d+").matcher(str);
Example
import java.util.ArrayList; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Demo { public static void main(String[] args) { String str = "(29, 12; 29, ) (45, 67; 78, 80)"; Matcher matcher = Pattern.compile("\d+").matcher(str); List<Integer>list = new ArrayList<Integer>(); while(matcher.find()) { list.add(Integer.parseInt(matcher.group())); } System.out.println("Integers = "+list); } }
Output
Integers = [29, 12, 29, 45, 67, 78, 80]
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