Error Missing parameter in call definition: String

I'm new with play 2.0. I created a signup form and now I try to create a search form. But I was caught by this `error: " Missing parameter in call definition: String In /home/thangnk/Task/conf/routes at line 17. "` . Here is my code : CONTROLLER --- Search.java ``` package controllers; import java.util.ArrayList; import java.util.List; import models.Task; import play.*; import play.data.Form; import play.db.ebean.Model.Finder; import play.mvc.*; import views.html.*; public class Search extends Controller{ static Form<Task> myform = form(Task.class); public static Result search(){ return ok(search.render()); } public static Result searchByusername(String username){ Form<Task> filledForm = myform.bindFromRequest(); username=filledForm.get().username; return ok(result_search.render(username)); } } ``` MODELS --- Task.java ``` package models; import java.util.*; import javax.persistence.Entity; import javax.persistence.Id; import play.data.validation.Constraints.Email; import play.data.validation.Constraints.MaxLength; import play.data.validation.Constraints.MinLength; import play.data.validation.Constraints.Required; import play.db.ebean.Model; import play.db.ebean.Model.Finder; @Entity public class Task extends Model { @Id public static Long id; // @Required // @MinLength(6) // @MaxLength(12) public String password; @Email public String email; // @MinLength(6) public String username; public Task() { } public Task(Long id, String username, String email, String password) { this.email = email; this.username = username; this.id = id; this.password = password; } public static Finder<Long, Task> find = new Finder(Long.class, Task.class); public static List<Task> all() { return find.all(); } public static void create(Task task) { task.save(); } public static void delete(Long id) { find.ref(id).delete(); } public static List<Task> searchByusername(String name) { return find.where().like("username", "%" + name + "%").findList(); } } ``` ROUTES ``` GET / controllers.Application.index() GET /tasks controllers.Application.tasks() POST /tasks controllers.Application.newTask() POST /tasks/:id/delete controllers.Application.deleteTask(id:Long) # POST /showuser controllers.Application.showUser() # Search GET /search controllers.Search.search() POST /result_search/:String controllers.Search.searchByusername(username:String) -------// This error mark at line "username : String" ---------------------------------- # Map static resources from the /public folder to the /assets URL path GET /assets/*file controllers.Assets.at(path="/public", file) ``` TERMINAL ---- ``` [error] {file:/home/thangnk/Task/}Task/compile:sources: in /home/thangnk/Task/conf/routes - PlayException: Compilation error [Missing parameter in call definition: String] [error] application - ! Internal server error, for request [GET /search] -> sbt.PlayExceptions$RoutesCompilationException: Compilation error [Missing parameter in call definition: String] at sbt.PlayCommands$$anonfun$52.apply(PlayCommands.scala:433) ~[na:na] at sbt.PlayCommands$$anonfun$52.apply(PlayCommands.scala:423) ~[na:na] at sbt.Scoped$$anonfun$hf3$1.apply(Structure.scala:474) ~[na:na] at sbt.Scoped$$anonfun$hf3$1.apply(Structure.scala:474) ~[na:na] at scala.Function1$$anonfun$compose$1.apply(Function1.scala:41) ~[scala-library.jar:0.11.3] at sbt.Scoped$Reduced$$anonfun$combine$1$$anonfun$apply$11.apply(Structure.scala:295) ~[na:na] ``` Hope u guys help me solved it and help me to complete this form.