import java.awt.*;
import java.awt.event.*;
import java.applet.*;
//import com.sun.java.swing.*;

//import com.sun.java.swing.UIManager;
public class crypto extends Applet{// implements ActionListener{
  boolean isStandalone = false;

  String initialS;
  BorderLayout borderLayout1 = new BorderLayout();
  TextArea textArea1 = new TextArea(4,60);
  Panel panel1 = new Panel();
  TextArea textArea2 = new TextArea(4,60);
  GridLayout gridLayout1 = new GridLayout(3,26);
  Label[] letterLabels;
  Label[] freqLabels;
  TextField[] nextField;

  public String convertedString(String in){
  //perform all substitutions
  //  uses char by char rebuilding
  // of string, used to use String.replace method
    String s = in.toUpperCase();
    StringBuffer out=new StringBuffer("");
    String n;
    char nextChar,thisChar;
    int i,index;
    for (i=0;i<s.length();i++){
       thisChar=s.charAt(i);
       if (thisChar<'A' || thisChar>'Z')
         out.append(thisChar);
       else {
          index=thisChar-'A';
          n=nextField[index].getText().trim().toLowerCase();
          if (n.length()>0){
            nextChar=n.charAt(0);
            out.append(nextChar);}
          else out.append(thisChar);}}
    return out.toString();}

  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet

  public crypto() {
  }
//Initialize the applet

  public void init() {
    try { initialS = this.getParameter("initialstring", "lyl fqg tred nten ntrdr'w oq xeur nqoyxtn? eaa ntr tqbzrf"+ 
"saefrdw beur lqco cynt ntr btybzro sgbzw."); } catch (Exception e) { e.printStackTrace(); }
    try {
    jbInit();
    }
    catch (Exception e) {
    e.printStackTrace();
    }
  }
  //static {
  //  try {
  //    //UIManager.setLookAndFeel(new com.sun.java.swing.plaf.metal.MetalLookAndFeel());
  //    //UIManager.setLookAndFeel(new com.sun.java.swing.plaf.motif.MotifLookAndFeel());
  //    UIManager.setLookAndFeel(new com.sun.java.swing.plaf.windows.WindowsLookAndFeel());
  //  }
  //  catch (Exception e) {}
  //}
//Component initialization

  private void jbInit() throws Exception {
    textArea1.setText(initialS);
    panel1.setLayout(gridLayout1);
    textArea2.setText("");
    textArea2.setEditable(false);
 //   gridLayout1.setRows(3);
 //   gridLayout1.setColumns(26);
    this.setLayout(borderLayout1);
//    this.setSize(700,300);
   int i;
    letterLabels=new Label[26];
    for (i=0;i<26;i++){
      letterLabels[i]=new Label(""+((char)((int)'A'+i)));
      panel1.add(letterLabels[i]);}
    freqLabels=new Label[26];
    for (i=0;i<26;i++){
      freqLabels[i]=new Label("");
      panel1.add(freqLabels[i]);}
    nextField=new TextField[26];
    for (i=0;i<26;i++){
      nextField[i]=new TextField("",1);
      panel1.add(nextField[i]);
 //     nextField[i].addActionListener(this);
      }
//    this.add(textArea1, BorderLayout.NORTH);
//    this.add(panel1, BorderLayout.CENTER);
//    this.add(textArea2, BorderLayout.SOUTH);
    this.add("North",textArea1);
    this.add("Center",panel1);
    this.add("South",textArea2);

  }

  // public void actionPerformed(ActionEvent e){
  public boolean action(Event e,Object o){
    boolean b= super.action(e,o);
 //    if (e.getId()==Event.ACTION_EVENT)
     textArea2.setText(convertedString(textArea1.getText()));
     return b;};

//Get Applet information

  public String getAppletInfo() {
    return "Applet Information";
  }
//Get parameter info

  public String[][] getParameterInfo() {
    String pinfo[][] =
    {
      {"initialstring", "String", ""},
    };
    return pinfo;
  }


//Main method
/*
  public static void main(String[] args) {
    crypto applet = new crypto();
    applet.isStandalone = true;
    Frame frame = new Frame();
    frame.setTitle("Applet Frame");
    frame.add(applet, BorderLayout.CENTER);
    applet.init();
    applet.start();
//    frame.setSize(700,300);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
    frame.setVisible(true);
  }
*/
  }