Use JavaScript Variable in Java [duplicate]

I want to use this below variable reqID into my java code, and I want to submit this prompt with this value. And that value i want to use in update.

function approveReset(){
    var reqID = prompt("Enter Request ID : ", "Request ID");
    <%
        try{
            -- Here i want to call my variable reqID--
            PreparedStatement ps_approve_req = conn.prepareStatement("<Some update statement>");
        } 
        catch (Exception e) {
            System.out.println(e);
            System.out.println("Some issue happened hence rolling back.");
            conn.rollback();
        }
    %>
}