/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
String s
= "@test, @{@test2, dasdas. @test3?} @test4? @test5!"; Matcher matcher = Pattern.compile("@(\\w+)").matcher(s);
List<String> res = new ArrayList<String>();
while (matcher.find()){
res.add(matcher.group(1));
}
}
}
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