java check if string contains only digits using regex

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import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class StringExample {

    private static final Pattern DIGITS_PATTERN = Pattern.compile("\\d+"); // or "[0-9]+"

    public static boolean containsOnlyDigits(String text) {
        Matcher matcher = DIGITS_PATTERN.matcher(text);
        return matcher.matches();
    }

    public static void main(String[] args) {

        System.out.println(containsOnlyDigits("123456"));               // true
        System.out.println(containsOnlyDigits("1234Sample text..." ));  // false
    }
}