io Programmo 21/IOPROG_21.ISO/SOFT/PASS.ZIP/password.java

Java Source | 1997-09-18 | 4.7 KB | 159 lines

/*


password.java


Made by John Eriksson 1997





[e-mail]





This code is free to use and modify!!!








EXAMPLE HTML CODE:


------------------





<center>


<applet code="password.class"  width=500 height=32>


<param name=root value="http://www.myhomepage.com/secretfiles/">


<param name=wrong value="http://www.myhomepage.com/secretfiles/wrong_pwd.html">


<param name=color value="ffffff">


<param name=textfield value="40">


<param name=button value="Open">


<param name=font_size value="12">


<param name=font_face value="Courier">


<param name=title value="Enter password:">


</applet>


<center>





*/





import java.applet.*;

import java.awt.*;

import java.lang.*;

import java.net.*;

import java.io.*;

import java.util.*;



/*====================================================================================

THE MAIN CLASS FOR THIS APPLET

====================================================================================*/

public class password extends java.applet.Applet

{

private Button b_open;

private TextField t_password;

private Label l_title;





private String root;


private int col;


private String title;


private String buttontxt;


private int bgcolor;


private int fsize;


private String fface;


private String errorURL;




/************************************************************************/

/* Init the display */

/************************************************************************/

public void init()

{

int loop;




   String att = getParameter("root");


   root = (att == null) ? this.getDocumentBase().toString() : att;


   att = getParameter("textfield");


   col = (att == null) ? 20 : (Integer.valueOf(att).intValue());


   att = getParameter("font_size");


   fsize = (att == null) ? 11 : (Integer.valueOf(att).intValue());


   att = getParameter("font_face");


   fface = (att == null) ? "Arial" : att;


   att = getParameter("color");


   bgcolor = (att == null) ? Color.white.getRGB() : (Integer.parseInt(att, 16));


   att = getParameter("title");


   title = (att == null) ? "" : att;


   att = getParameter("button");


   buttontxt = (att == null) ? "OPEN" : att;


   att = getParameter("wrong");


   errorURL = (att == null) ? "" : att;




   setFont(new Font(fface, Font.PLAIN, fsize));


   setBackground(new Color(bgcolor));




   b_open = new Button(buttontxt);


   t_password = new TextField(col);


   l_title = new Label(title);





   t_password.setBackground(Color.white);


   t_password.setEchoCharacter('*');





   setLayout(new FlowLayout(FlowLayout.CENTER,3,3));





   if(title.length()>0)


      add(l_title);





   add(t_password);

   add(b_open);





   show();

}

/************************************************************************/


/* Surf to error URL */


/************************************************************************/


void surfto_error()


{


   if(errorURL.length()>0) {


      try {


         getAppletContext().showDocument(new URL(errorURL),"_self");


      }


      catch (MalformedURLException e) {}


   }


   else


      showStatus("Invalid password!");


}





/************************************************************************/


/* Surf to an URL */


/************************************************************************/


void surfto()


{


   if(t_password.getText().length()>0) {


      try{


         URL surftoURL = new URL(root+t_password.getText()+".html");


         InputStream in = surftoURL.openStream();


         int input = in.read();


         in.close();


         getAppletContext().showDocument(surftoURL,"_self");


      }


      catch (MalformedURLException e) { surfto_error(); }


      catch (SecurityException e) { surfto_error(); }


      catch (IOException e) { surfto_error(); }





      t_password.setText("");


   }


}



/************************************************************************/

/* Handle all events */

/************************************************************************/

public boolean handleEvent(Event evt)

{




   if(evt.id == Event.KEY_PRESS && evt.target == t_password && evt.key==10){


      surfto();


      return(true);


   }


   return super.handleEvent(evt);

}



/************************************************************************/

/* Handle all actions */

/************************************************************************/

public boolean action(Event evt, Object arg)

{

   if (evt.target == b_open) {

      surfto();


      return true;

   }


   return(super.action(evt,arg));

}

}