Code to register a new patient in a clinic

import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.event.*;

class  SearchFromFile{
    public static void main(String[] args)  {

        JFrame f=new JFrame();
        f.setLayout(null);
        final JLabel label=new JLabel("Enter Name to search: ");
        final JTextField text=new JTextField(20);
        final JButton b=new JButton("Search");
        final JLabel lab1=new JLabel("Name: ");
        final JTextField text1=new JTextField(20);
        final JLabel lab2=new JLabel("Address: ");
        final JTextField text2=new JTextField(20);
        final JLabel lab3=new JLabel("Contact No: ");
        final JTextField text3=new JTextField(20);
        final JLabel lab4=new JLabel("Email: ");
        final JTextField text4=new JTextField(20);
        final JButton button=new JButton("Edit");
        final JButton addbutton=new JButton("Add");
        final ArrayList list=new ArrayList();

        label.setBounds(20,20,150,20);
        text.setBounds(170,20,100,20);

        lab1.setBounds(20,70,100,20);
        text1.setBounds(120,70,100,20);

        lab2.setBounds(20,100,100,20);
        text2.setBounds(120,100,100,20);

        lab3.setBounds(20,130,100,20);
        text3.setBounds(120,130,100,20);

        lab4.setBounds(20,160,100,20);
        text4.setBounds(120,160,100,20);

        b.setBounds(170,50,80,20);
        addbutton.setBounds(20,190,100,20);
        button.setBounds(120, 190,80,20);


        lab1.setVisible(false);
        text1.setVisible(false);

        lab2.setVisible(false);
        text2.setVisible(false);

        lab3.setVisible(false);
        text3.setVisible(false);

        lab4.setVisible(false);
        text4.setVisible(false);

        button.setVisible(false);
        addbutton.setVisible(false);

        b.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent ae) {
          String value = text.getText();
          File f = new File("c:/data.txt");
          try {
             BufferedReader freader = new BufferedReader(new FileReader( f));
             String s;
             while ((s = freader.readLine()) != null) {
                String[] st = s.split(" ");
                String name = st[0];
                String address = st[1];
                String contact = st[2];
                String email = st[3];
                list.add(name);
                if(name.equals(value)) {
                        int answer = JOptionPane.showConfirmDialog(null, "Do you want to update the record?");
                        if(answer == JOptionPane.YES_OPTION) {
                        lab1.setVisible(true);
                        text1.setVisible(true);
                        lab2.setVisible(true);
                        text2.setVisible(true);
                        lab3.setVisible(true);
                        text3.setVisible(true);
                        lab4.setVisible(true);
                        text4.setVisible(true);
                        button.setVisible(true);
                        label.setVisible(false);
                        text.setVisible(false);
                        b.setVisible(false);
                        addbutton.setVisible(false);
                        text1.setText(name);
                        text2.setText(address);
                        text3.setText(contact);
                        text4.setText(email);
                        }
                    }                                
                }

continue....

if(!list.contains(value)) {
                        int answer = JOptionPane.showConfirmDialog(null, "Record Not Found! Do you want to add the record?");
                        if(answer == JOptionPane.YES_OPTION) {
                        lab1.setVisible(true);
                        text1.setVisible(true);
                        lab2.setVisible(true);
                        text2.setVisible(true);
                        lab3.setVisible(true);
                        text3.setVisible(true);
                        lab4.setVisible(true);
                        text4.setVisible(true);
                        addbutton.setVisible(true);
                        label.setVisible(false);
                        text.setVisible(false);
                        b.setVisible(false);
                        button.setVisible(false);
                        addbutton.addActionListener(new ActionListener() {
                              public void actionPerformed(ActionEvent ae) {
                               String t1 = text1.getText();
                               String t2 = text2.getText();
                               String t3 = text3.getText();
                               String t4 = text4.getText();
                               File f3 = new File("c:/data.txt");
                               try {
                                    BufferedWriter output = new BufferedWriter(new FileWriter(f3,true));
                                    output.newLine();
                                    output.write(t1 + " " + t2 + " " + t3 + " " + t4);
                                    output.close();
                                    JOptionPane.showMessageDialog(null,"Record is added successfully!");
                                }
                                catch(Exception e){}
                              }
                        });
                    }
                }
                  freader.close();
                }
                catch (Exception e) { }
                        }
                });
                button.addActionListener(new ActionListener() {
                  public void actionPerformed(ActionEvent ae) {
                  String value = text.getText();
                  String t1 = text1.getText();
                  String t2 = text2.getText();
                  String t3 = text3.getText();
                  String t4 = text4.getText();
                  File f3 = new File("c:/new.txt");
                  File f4 = new File("c:/data.txt");
                  try {
                       BufferedWriter output = new BufferedWriter(new FileWriter(f3));
                       BufferedReader freader = new BufferedReader(new FileReader(f4));
                       String s;
                       while ((s = freader.readLine()) != null) {
                          String[] f = s.split(" ");
                          String n = f[0];
                          String add = f[1];
                          String con= f[2];
                          String emailid = f[3];
                        if (!n.equals(value)) {
                           output.write(s);
                           output.newLine();
                        }
                        }
                       freader.close();
                        output.write(t1 + " " + t2 + " " + t3 + " " + t4);
                        output.close();
                        JOptionPane.showMessageDialog(null,"Record is updated successfully!");
                         }
                         catch (Exception e) {}
                         f4.delete();
                         f3.renameTo(f4);
                        }
                });

                f.add(label);
                f.add(text);
                f.add(lab1);
                f.add(text1);
                f.add(lab2);
                f.add(text2);
                f.add(lab3);
                f.add(text3);
                f.add(lab4);
                f.add(text4);
                f.add(b);
                f.add(button);
                f.add(addbutton);
                f.setSize(400,300);
                f.setVisible(true);
    }
}