import java.awt.Color;
import javax.swing.JApplet;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.JLabel;
import javax.swing.JTextField;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class assem extends JApplet implements ActionListener {
    private static JTextField Input = new JTextField();
    private static JTextField Output = new JTextField();
    ButtonGroup radioGroup = new ButtonGroup();

    public void init(){
        Container display = getContentPane();
        display.setBackground(Color.PINK);
        display.setLayout(new FlowLayout());
        JLabel instruct = new JLabel("Enter a number\n then click on 2, 8, 16\n to convert the number to its binary, octal and hexadecimal value respectively");
        display.add(instruct);
        JRadioButton bin = new JRadioButton("binary");
        radioGroup.add(bin);
        bin.addActionListener(this);
        display.add(bin);
        JRadioButton oct = new JRadioButton("octal");
        radioGroup.add(oct);
        oct.addActionListener(this);
        display.add(oct);
        JRadioButton hex = new JRadioButton("hexadecimal");
        radioGroup.add(hex);
        hex.addActionListener(this);
        display.add(hex);



        Input.setText("enter number here.");
        Output.setText("Result");
        display.add(Input);
        display.add(Output);
    }

    public void actionPerformed(ActionEvent e){
        String action = e.getActionCommand();
        if (action.equals("binary")){
            String runz = "";
            String Str_numb = Input.getText();
            int numb = Integer.parseInt(Str_numb);
            while (numb > 0){
            int y = numb%2;
            runz = runz + y + "";
            numb = numb/2;
            }
            String ans = new StringBuffer(runz).reverse().toString();
            Output.setText(ans);
        }
        else if(action.equals("octal")){
            String runz = "";
            String Str_numb = Input.getText();
            int numb = Integer.parseInt(Str_numb);
            while (numb > 0){
            int y = numb%8;
            runz = runz + y + "";
            numb = numb/8;
            }
            String ans = new StringBuffer(runz).reverse().toString();
            Output.setText(ans);
        }
        else if (action.equals("hexadecimal")){
            String runz = "";
            char add;
            String Str_numb = Input.getText();
            int numb = Integer.parseInt(Str_numb);
            while(numb > 0){
                int y = numb%16;
                if (y < 10){
                runz = runz + y +"";
                numb = numb/16;}
                if (y == 10){
                    add = 'A';
                    runz = runz+add;
                    numb= numb/16;}
                 else if (y == 11){
                        add = 'B';
                        runz = runz+add;
                        numb = numb/16;}
                else if (y == 12){
                        add = 'C';
                        runz = runz+add;
                        numb = numb/16;}
                else if (y == 13){
                        add = 'D';
                        runz = runz+add;
                        numb = numb/16;}
                else if (y == 14){
                        add = 'E';
                        runz = runz+add;
                        numb = numb/16;}
                else if (y == 15){
                        add = 'F';
                        runz = runz+add;
                        numb = numb/16;}}
            String ans = new StringBuffer(runz).reverse().toString();
            Output.setText(ans);


        }
    }

}