[java-list] Erro em action

[Nijava]

Pessoal, sabem o porque do erro abaixo?   Tf1.java [19:1] No method found matching action(Event,int)                 return super.action(ev, key);                              ^     import java.awt.*; public class Tf1 extends java.applet.Applet {  TextField tf1;  Button bt1;  public boolean action (Event ev, Object ob)  {  ...   }  public boolean keyDown (Event ev, int key)  {   if (ev.target == tf1) // somente para teste      System.out.println("Key em textfield: "+ key);          return super.action(ev, key);             }  public void init()  {   add (new Label ("Senha: "));   tf1 = new TextField (8);   add  (tf1);   bt1 = new Button ("Continue");   add (bt1);   tf1.setEchoCharacter('*');  } }