import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "(?<! [a-z]| [a-z]{2})(?<!\\b[a-z]|\\b[a-z]{2})\\.(?! |\\d|\\.)";
final String string = "C.J. This is my example text. After this sentence there is no space after dot.What should? I want PHP to add whitespace in that case, but not after sentence where I already have white space or like now 3times dot...Another thing is that it can be written how great is to win 1.000.000 on lottery but I really don't want it to be 1. 000. 000 after edititng... Also C.J. must stay C.J. and not C. J.... wow that is hard :)";
final Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html