Sure! Here are some examples of using the @WebInitParam annotation in Java:

1. Basic Usage:

The @WebInitParam annotation is used to specify initialization parameters for a servlet, filter or listener. Here's an example:

@WebServlet(name = "MyServlet", urlPatterns = {"/myservlet"}, initParams = {
        @WebInitParam(name = "param1", value = "value1"),
        @WebInitParam(name = "param2", value = "value2")
})
public class MyServlet extends HttpServlet {
    // servlet implementation
}

In this example, the @WebInitParam annotation is used to specify two initialization parameters, param1 with value value1, and param2 with value value2, for the servlet named MyServlet.

2. Using Default Values:

You can also specify default values for initialization parameters using the defaultValue attribute. Here's an example:

@WebServlet(name = "MyServlet", urlPatterns = {"/myservlet"}, initParams = {
        @WebInitParam(name = "param1", value = "value1", defaultValue = "default1"),
        @WebInitParam(name = "param2", value = "value2")
})
public class MyServlet extends HttpServlet {
    // servlet implementation
}

In this example, the @WebInitParam annotation specifies a default value of default1 for the param1 initialization parameter.

3. Overriding Default Values:

You can override default values for initialization parameters in the deployment descriptor (web.xml) by leaving the value attribute empty. Here's an example:

@WebServlet(name = "MyServlet", urlPatterns = {"/myservlet"}, initParams = {
        @WebInitParam(name = "param1", value = "", defaultValue = "default1"),
        @WebInitParam(name = "param2", value = "value2")
})
public class MyServlet extends HttpServlet {
    // servlet implementation
}

In this example, the @WebInitParam annotation specifies a default value of default1 for the param1 initialization parameter, but it can be overridden in the deployment descriptor.

These are just a few examples of the many ways that you can use the @WebInitParam annotation in Java. The annotation is a powerful tool for specifying initialization parameters for your servlets, filters and listeners.