import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "((?:[a-zA-Z][0-9a-zA-Z]*)(?:\\,\\s*[a-zA-Z][0-9a-zA-Z]*){0,2})\\s+in\\s+([a-zA-Z][0-9a-zA-Z\\.]*)";
final String string = "//초록색으로 표시되는 부분(A)에는 객체의 속성값, 키값, 인덱스값을 각각 표현할 단어를 지정합니다\n"
+ "//빨간색 부분(B)에는 바인딩 할 객체를 지정합니다. '.'을 통해 내부 객체에 접근할수도 있습니다.\n"
+ "//전체적으로 A in B의 형태를 띄게 됩니다.\n\n"
+ "val, key, index in sampleObj.inner\n"
+ "val, key in sampleObj.inner\n"
+ "val in sampleObj";
final Pattern pattern = Pattern.compile(regex);
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