How to get client ip address in java servlet

HTTPServletRequest Object has a method called servletRequest.getRemoteAddr(). This method can be used to get the ip address of the client.

    String ipAddress = request.getRemoteAddr();  
    System.out.print(ipAddress);

Life cycle of the servlet

A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers. ( more reference ).