Java tutorial
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("[a-c]+", "aBc"); matchFound = pattern.matches("(?i)[a-c]+", "aBc"); } }