Implement FTP functions in java (source code)

Import sun.net. ftp .*;
Import sun.net .*;
Import java. awt .*;
Import java. awt. event .*;
Import java. applet .*;
Import java. io .*;
Public class FtpApplet extends Applet
{
FtpClient aftp;
DataOutputStream outputs;
TelnetInputStream ins;
TelnetOutputStream outs;
TextArea lsArea;
Label LblPrompt;
Button BtnConn;
Button BtnClose;
TextField TxtUID;
TextField TxtPWD;
TextField TxtHost;
Int ch;
Public String a = "no host connected ";
String hostname = "";
Public void init (){
SetBackground (Color. white );
SetLayout (new GridBagLayout ());
GridBagConstraints GBC = new GridBagConstraints ();
LblPrompt = new Label ("no host connected ");
LblPrompt. setAlignment (Label. LEFT );
BtnConn = new Button ("connection ");
BtnClose = new Button ("disconnected ");
BtnClose. enable (false );
TxtUID = new TextField ("", 15 );
TxtPWD = new TextField ("", 15 );
TxtPWD. setEchoCharacter ('*');
TxtHost = new TextField ("", 20 );
Label LblUID = new Label ("User ID :");
Label LblPWD = new Label ("PWD :");
Label LblHost = new Label ("Host :");
LsArea = new TextArea (30, 80 );
LsArea. setEditable (false );
GBC. gridwidth = GridBagConstraints. REMAINDER;
GBC. fill = GridBagConstraints. HORIZONTAL;
(GridBagLayout) getLayout (). setConstraints (LblPrompt, GBC );
Add (LblPrompt );
GBC. gridwidth = 1;
(GridBagLayout) getLayout (). setConstraints (LblHost, GBC );