How to read property file in java?

public class ReadProps {
    public static void main (String[] args) {
        ReadProps readProps = new ReadProps();
        readProps.readFile("test.properties");
    }

    private void readFile (String fileName) {
        try {
            InputStream is = getClass().getResourceAsStream(fileName);
            Properties props = new Properties();
            props.load(is);
        } catch (IOException ex) {
           ex.printStackTrace();
        }
    }
}