Online shopping form in java

//Online shopping form in java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MyForm extends JApplet implements ActionListener
{
    //vars
    String str="", str1="", str2="";
    Object x[];
    JLabel n,a,i,lbl;
    JTextField name;
    JTextArea addr;
    JList lst;
    JButton b1,b2;
    Container c;
    public void init()
    {
        //create JFrame and container
        JFrame jf = new JFrame();
        c = jf.getContentPane();
        //display yellow background color in container
        c.setBackground(Color.yellow);
        //do not set any layout to c
        c.setLayout(null);
        //set the size and title for frame
        jf.setSize(500,400);
        jf.setTitle("My Form");
        //display the frame
        jf.setVisible(true);
        //Display heading in the frame using a label
        Font f = new Font("Dialog",Font.BOLD,26);
        lbl = new JLabel();
        lbl.setFont(f);
        lbl.setForeground(Color.red);
        lbl.setText("Z-ELECTRONICS ONLINE SHOP");
        lbl.setBounds(200,10,500,50);
        c.add(lbl);
        //TextField and a label for entering name
        n = new JLabel("Name: ", JLabel.LEFT);
        name = new JTextField(30);
        n.setBounds(50,100,100,30);
        name.setBounds(200,100,200,30);
        c.add(n);
        c.add(name);
        //TextArea and a label for entering address
        a = new JLabel("Address: ", JLabel.LEFT);
        addr = new JTextArea(5,50);
        a.setBounds(50,150,100,30);
        addr.setBounds(200,150,200,100);
        c.add(a);
        c.add(addr);
//List box for multiple selection
        i = new JLabel("Select items: ", JLabel.LEFT);
String[] data = {"TVs", "Washing machines", "DVD players",
        "Refrigerators"};
        lst = new JList(data);
        i.setBounds(50,270,100,30);
        lst.setBounds(200,270,200,100);
        c.add(i);   
        c.add(lst);
//add Two push buttons: OK and Cancel
        b1 = new JButton("OK");
        b2 = new JButton("Cancel");
        b1.setBounds(200,400,100,30);
        b2.setBounds(350,400,100,30);
        c.add(b1);
        c.add(b2);
        //add listeners to buttons
        b1.addActionListener(this);
        b2.addActionListener(this);
    }
    //this method is executed when the buttons are clicked
    public void actionPerformed(ActionEvent ae)
    {
        //know which button is clicked
        str = ae.getActionCommand();
        //if the button label is OK then
        if(str.equals("OK"))
        {
            //retrieve data from text field, text area and list boxes
            str1= name.getText()+"\n";
            str1+= addr.getText()+"\n";
            x = lst.getSelectedValues();   
            for(int i=0;i<x.length; i++)
str2 +=(String)x[i]+"\n";    
            //display the data in text area
            addr.setText(str1+str2);

            //make the strings empty
            str1="";

   str2="";
        }
        else{

            //if Cancel button is clicked, clear the data in the form
            name.setText("");
            addr.setText("");
            lst.clearSelection();
        }
    }
}

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