Question

Why when executed my frame does not contain what i have added to it?

Here is my code

import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JPanel;

@SuppressWarnings("serial")
public class AddressBook1 extends JFrame implements ActionListener {
   /**
   *
   */
  
   JLabel name = new JLabel("Name: ");
   JLabel address = new JLabel("Address: ");
   JLabel phone = new JLabel("Phone: ");
   JLabel email = new JLabel("Email: ");
  
   JTextField nameField = new JTextField();
   JTextField addressField = new JTextField();
   JTextField phoneField = new JTextField();
   JTextField emailField = new JTextField();
  
   JButton addContact = new JButton("Add Contact");
   JButton saveToFile = new JButton("Save to File");
  
   JTextArea contactsTextArea = new JTextArea(20,50);
  
   JPanel panel = new JPanel();

  
   public AddressBook1() {
      
       panel.add(name);
       panel.add(address);
       panel.add(phone);
       panel.add(email);
       panel.add(nameField);
       panel.add(addressField);
       panel.add(phoneField);
       panel.add(emailField);
       panel.add(addContact);
       panel.add(saveToFile);
       panel.add(contactsTextArea);
      
   //   frame.add(panel);
      
  

       // TODO Auto-generated constructor stub
   }
  
   public void readContactsFromFile() {
      
   }
  

  
   @Override
   public void actionPerformed(ActionEvent e) {
       if(e.getActionCommand().equals("Add Contact")) {
          
       }
       else if(e.getActionCommand().equals("Save to File")) {
          
       }
       // TODO Auto-generated method stub
      
   }
  
   public void writeContactsToFile() {
      
   }
  
   public static void main(String[] args) {
      
       JFrame frame = new JFrame();
      
      
       AddressBook1 addBook = new AddressBook1();
      
      
       addBook.setSize(300,400);
       addBook.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       addBook.setVisible(true);
   }

}

Answer 1

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;

@SuppressWarnings("serial")
public class AddressBook1 extends JFrame implements ActionListener {
   /**
   *
   */

   JLabel name = new JLabel("Name: ");
   JLabel address = new JLabel("Address: ");
   JLabel phone = new JLabel("Phone: ");
   JLabel email = new JLabel("Email: ");

   JTextField nameField = new JTextField(10);
   JTextField addressField = new JTextField(10);
   JTextField phoneField = new JTextField(10);
   JTextField emailField = new JTextField(10);

   JButton addContact = new JButton("Add Contact");
   JButton saveToFile = new JButton("Save to File");

   JTextArea contactsTextArea = new JTextArea(20,50);

   JPanel panel = new JPanel();
   JFrame frame;

   public AddressBook1() {

       panel.add(name);
       panel.add(address);
       panel.add(phone);
       panel.add(email);
       panel.add(nameField);
       panel.add(addressField);
       panel.add(phoneField);
       panel.add(emailField);
       panel.add(addContact);
       panel.add(saveToFile);
       panel.add(contactsTextArea);
       frame = new JFrame();

       frame.setSize(300,400);
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       frame.setVisible(true);
       // missed adding panel to the frame
       // as you have created the frame inside the main
       frame.add(panel);

       // TODO Auto-generated constructor stub
   }

   public void readContactsFromFile() {

   }

   @Override
   public void actionPerformed(ActionEvent e) {
       if(e.getActionCommand().equals("Add Contact")) {

       }
       else if(e.getActionCommand().equals("Save to File")) {

       }
       // TODO Auto-generated method stub

   }

   public void writeContactsToFile() {

   }

   public static void main(String[] args) {

       AddressBook1 addBook = new AddressBook1();

   }

}

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