Use enclosing form
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main {
public static void main(String[] argv) throws Exception {
CharSequence inputStr = "Abc";
String patternStr = "abc";
// Compile with case-insensitivity
Pattern pattern = Pattern.compile(patternStr, Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(inputStr);
boolean matchFound = matcher.matches();
matchFound = pattern.matches("((?i)a)bc", "aBc");
matchFound = pattern.matches("(?i:a)bc", "aBc");
matchFound = pattern.matches("a((?i)b)c", "aBc");
matchFound = pattern.matches("a(?i:b)c", "aBc");
}
}
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