title: GWT - Manage a boolean method in the RPC configuration
body: <p>I have make my own method in the RPC schema by using the GWT framework. Now, i need to add another method.</p>
  
  <p>So, i wrote this code for each part of RPC :</p>
  
  <pre><code>package org.sinfonet.client;
  
  import com.google.gwt.user.client.rpc.RemoteService;
  import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
  
  @RemoteServiceRelativePath("gwtservice")
  public interface GWTService extends RemoteService {
      public String checkLogin(String nickname, String password);
      public boolean anotherFunction(String nickname);
  }
  
  #########################################################
  
  package org.sinfonet.client;
  
  import com.google.gwt.user.client.rpc.AsyncCallback;
  
  public interface GWTServiceAsync {
      public void checkLogin(String nickname, String password, AsyncCallback&lt;String&gt; callback);
      public void anotherFunction(String nickname, AsyncCallback&lt;java.lang.Boolean&gt; asyncCallback);
  }    
  
  #########################################################
  
  package org.sinfonet.server;
  
  import com.google.gwt.user.server.rpc.RemoteServiceServlet;
  import java.util.ArrayList;
  
  import org.sinfonet.client.GWTService;
  import org.sinfonet.mgmt.Configuration;
  import org.sinfonet.mgmt.Database;
  
  public class GWTServiceImpl extends RemoteServiceServlet implements GWTService {
      public String checkLogin(String nickname, String password) {
          Database mydb=Configuration.getDatabase();
          mydb.connetti();
  
          // faccio md5 ed escape
          String log_check_user=nickname;
          String log_check_pass=password;
  
          // controllo che l'utente esista
          ArrayList&lt;String[]&gt; db_result=null;
          db_result=mydb.selectQuery("SELECT nickname FROM users WHERE nickname='"+log_check_user+"' AND password='"+log_check_pass+"'");
          if(db_result.size()!=0) {
              return "YES";
          }
  
          // sconnessione al database
          mydb.disconnetti();
  
          return "NO";
      }
  
      public boolean anotherFunction(String nickname) {
          // somethings others
          return true;
      }
  }
  
  #########################################################
  
  final AsyncCallback&lt;java.lang.Boolean&gt; callCheckLogin = new AsyncCallback&lt;java.lang.Boolean&gt;() {
      public void onSuccess(boolean result) {
          if(result) {
              designLogout(menu_login_label1.getText());
          } else {
              menu_err.setText("Username e password non validi");
          }
      }
  };
  
  // Listen for the button clicks
  menu_login_button.addClickHandler(new ClickHandler(){
      public void onClick(ClickEvent event) {
          // Make remote call. Control flow will continue immediately and later
          // 'callback' will be invoked when the RPC completes.
          getService().anotherFunction(menu_login_input1.getText(), callCheckLogin);
      }
  });
  </code></pre>
  
  <p>as you can see, i added the anotherFunction() method (boolean), but Netbeans says to me that i need to implements all abracts method about allCheckLogin, but i wont do it :) How can I fix this problem?</p>