import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "(?<!:)(\\/\\/).+$|\\/\\*[\\s\\S]+\\*\\/";
final String string = "// comments at the beginning of the file are removed\n\n"
+ "/*\n"
+ "Block comments are removed - easy peasy\n"
+ "*/\n\n"
+ "https://urls.are.preserved.for.you// and comments after them are removed\n"
+ "asdfasdf// the comment can bump right up to text\n"
+ "asdfasdf;// ...or a semicolon.\n\n"
+ "{\n"
+ " foo:// you will need a parser to remove this comment b/c it smells like a URL\n"
+ " \"bar\",// ...but not this one\n"
+ " boo: // ...or this one\n"
+ " \"who\"\n"
+ "}";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
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