import java.applet.Applet;
    import java.applet.AppletContext;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.io.*;
    import java.net.MalformedURLException;
    import java.net.URL;
    import java.util.EventObject;

    public class PasswdLevel4 extends applet
    implements actionlistener
    {

    public PasswdLevel4()
    {
    inuser = new string[22];
    totno = 0;
    countConn = null;
    countData = null;
    inURL = null;
    txtlogin = new textfield();
    label1 = new label();
    label2 = new label();
    label3 = new label();
    txtpass = new textfield();
    lblstatus = new label();
    ButOk = new button();
    ButReset = new button();
    lbltitle = new label();
    }

    void ButOk_ActionPerformed(actionevent actionevent)
    {
    boolean flag = false;
    for(int i = 1; i <= totno / 2; i++)
    if(txtlogin.getText().trim().toUpperCase().intern() == inuser[2 * (i - 1) + 2].trim().toUpperCase().intern() && txtpass.getText().trim().toUpperCase().intern() == inuser[2 * (i - 1) + 3].trim().toUpperCase().intern())
    {
    lblstatus.setText("Login Success, Loading..");
    flag = true;
    string s = inuser[1].trim().intern();
    string s1 = getParameter("targetframe");
    if(s1 == null)
    s1 = "_self";
    try
    {
    finalurl = new url(getCodeBase(), s);
    }
    catch(malformedurlexception _ex)
    {
    lblstatus.setText("Bad URL");
    }
    getAppletContext().showDocument(finalurl, s1);
    }

    if(!flag)
    lblstatus.setText("Invaild Login or Password");
    }

    void ButReset_ActionPerformed(actionevent actionevent)
    {
    txtlogin.setText("");
    txtpass.setText("");
    }

    public void actionPerformed(actionevent actionevent)
    {
    object obj = actionevent.getSource();
    if(obj == ButOk)
    {
    ButOk_ActionPerformed(actionevent);
    return;
    }
    if(obj == ButReset)
    ButReset_ActionPerformed(actionevent);
    }

    public void destroy()
    {
    ButOk.setEnabled(false);
    ButReset.setEnabled(false);
    txtlogin.setVisible(false);
    txtpass.setVisible(false);
    }

    public void inFile()
    {
    new stringbuffer();
    try
    {
    countConn = inURL.openStream();
    countData = new bufferedreader(new inputstreamreader(countConn));
    string s;
    while((s = countData.readLine()) != null)
    if(totno < 21)
    {
    totno = totno + 1;
    inuser[totno] = s;
    s = "";
    } else
    {
    lblstatus.setText("Cannot Exceed 10 users, Applet fail start!");
    destroy();
    }
    }
    catch(ioexception ioexception)
    {
    getAppletContext().showStatus("IO Error:" + ioexception.getMessage());
    }
    try
    {
    countConn.close();
    countData.close();
    return;
    }
    catch(ioexception ioexception1)
    {
    getAppletContext().showStatus("IO Error:" + ioexception1.getMessage());
    }
    }

    public void init()
    {
    setLayout(null);
    setSize(361, 191);
    add(txtlogin);
    txtlogin.setBounds(156, 72, 132, 24);
    label1.setText("Please Enter Login Name & Password");
    label1.setAlignment(1);
    add(label1);
    label1.setFont(new font("Dialog", 1, 12));
    label1.setBounds(41, 36, 280, 24);
    label2.setText("Login");
    add(label2);
    label2.setFont(new font("Dialog", 1, 12));
    label2.setBounds(75, 72, 36, 24);
    label3.setText("Password");
    add(label3);
    add(txtpass);
    txtpass.setEchoChar('*');
    txtpass.setBounds(156, 108, 132, 24);
    lblstatus.setAlignment(1);
    label3.setFont(new font("Dialog", 1, 12));
    label3.setBounds(75, 108, 57, 21);
    add(lblstatus);
    lblstatus.setFont(new font("Dialog", 1, 12));
    lblstatus.setBounds(14, 132, 344, 24);
    ButOk.setLabel("OK");
    add(ButOk);
    ButOk.setFont(new font("Dialog", 1, 12));
    ButOk.setBounds(105, 156, 59, 23);
    ButReset.setLabel("Reset");
    add(ButReset);
    ButReset.setFont(new font("Dialog", 1, 12));
    ButReset.setBounds(204, 156, 59, 23);
    lbltitle.setAlignment(1);
    add(lbltitle);
    lbltitle.setFont(new font("Dialog", 1, 12));
    lbltitle.setBounds(12, 14, 336, 24);
    string s = getParameter("title");
    lbltitle.setText(s);
    ButOk.addActionListener(this);
    ButReset.addActionListener(this);
    infile = new string("level4");
    try
    {
    inURL = new url(getCodeBase(), infile);
    }
    catch(malformedurlexception _ex)
    {
    getAppletContext().showStatus("Bad Counter URL:" + inURL);
    }
    inFile();
    }

    private url finalurl;
    string infile;
    string inuser[];
    int totno;
    inputstream countConn;
    bufferedreader countData;
    url inURL;
    textfield txtlogin;
    label label1;
    label label2;
    label label3;
    textfield txtpass;
    label lblstatus;
    button ButOk;
    button ButReset;
    label lbltitle;
    }