import java.awt.*;
import java.net.*;

public class SAT extends java.applet.Applet {

    Choice tChoice = new Choice();
    TextField tRegisterField = new TextField("0", 10);
    final static String cSubtractOneString = "-1";
    final static String cSetToZeroString = "=0";
    final static String cAddOneString = "+1";
    Button tSubtractOneButton = new Button(cSubtractOneString);
    Button tSetToZeroButton = new Button(cSetToZeroString);
    Button tAddOneButton = new Button(cAddOneString);
    TextField tTimeField = new TextField(35);
    final static String cTimeString = "Get Time";
    Button tTimeButton = new Button(cTimeString);

    public void init() {
        setLayout(new FlowLayout());
        setFont(new Font("Helvetica", Font.BOLD, 24));
        generateAuthorPanel();
        generateRegisterPanel();
        generateTimePanel();
        generateInetPanel();

    }

    void generateAuthorPanel() {
        Label tAuthorLabel = new Label("Version 18:02:34: BJC says: \"I made this!\"");
        tAuthorLabel.setBackground(Color.green);
        add(tAuthorLabel);
    }

    void generateRegisterPanel() {
        Panel tRegisterPanel = new Panel();
        tRegisterField.setEditable(false);
        tRegisterField.setBackground(Color.yellow);
        tRegisterPanel.add(tRegisterField);
        tRegisterPanel.add(tSubtractOneButton);
        tRegisterPanel.add(tSetToZeroButton);
        tRegisterPanel.add(tAddOneButton);
        tChoice.addItem("Reset register");
        tChoice.addItem("Add one");
        tChoice.addItem("Subtract one");
        tRegisterPanel.add(tChoice);
        add(tRegisterPanel);
    }

    void generateTimePanel() {
        Panel tTimePanel = new Panel();
        tTimeField.setEditable(false);
        tTimeField.setBackground(Color.cyan);
        tTimePanel.add(tTimeField);
        tTimePanel.add(tTimeButton);
        add(tTimePanel);
    }

    void generateInetPanel() {
        Panel tInetPanel = new Panel();
	try {
            Label tToString = new Label(InetAddress.getLocalHost().toString());
            tInetPanel.add(tToString);
            Label tGetHostName = new Label(InetAddress.getLocalHost().getHostName());
            tInetPanel.add(tGetHostName);
        } catch (UnknownHostException tUnknownHostException) {
	}
	add(tInetPanel);
    }

    public boolean action(Event evt, Object arg) {
        if (evt.target instanceof Choice) {
            int tChoiceNumber = tChoice.getSelectedIndex();
            int tCurrentValue = (Integer.valueOf(tRegisterField.getText())).intValue();
            switch ( tChoiceNumber) {
               case 0:
                  tRegisterField.setText("0");
                  return true;
               case 1:
                  tRegisterField.setText(String.valueOf(tCurrentValue + 1));
                  return true;
               case 2:
                  tRegisterField.setText(String.valueOf(tCurrentValue - 1));
                  return true;
            } ;
        }
        if (evt.target instanceof Button) {
            String tString = (String)arg;
            if ( tString == cSetToZeroString ) {
               tRegisterField.setText("0");
               return true;
            } 
            int tCurrentValue = (Integer.valueOf(tRegisterField.getText())).intValue();
            if ( tString == cAddOneString ) {
               tRegisterField.setText(String.valueOf(tCurrentValue + 1));
               return true;
            }
            if ( tString == cSubtractOneString ) {
               tRegisterField.setText(String.valueOf(tCurrentValue - 1));
               return true;
            } 
            if ( tString == cTimeString ) {
               java.util.Date tTime = new java.util.Date();
               tTimeField.setText(tTime.toString());
               return true;
            } 
           return true;
        }
        return false;
    }

    public static void main(String[ ] args) {
        Frame f = new Frame("SAT Program started from main");
        SAT ex1 = new SAT();
        ex1.init();
        f.add("Center", ex1);
        f.pack();
        f.resize(650,300);
        f.show();
    }
}