Answered: When i press save for AddReservation i…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

When i press save for AddReservation i do not see the data on the gui i want a table visible when the gui is loaded and when the data is inputted i want to see the output

import java.awt.*;

import javax.swing.*;

import javax.swing.table.DefaultTableModel;

import java.awt.event.ActionListener;

import java.util.Random;

import java.awt.BorderLayout;

import java.awt.event.ActionEvent;

public class EntryScreen extends JFrame {

// Declare all necessary components as instance variables

private JTextField txtName;

private JTextField txttableNumber;

private JTextField txtcapacity;

private JTable table;

private JTextField txtID;

private JTextField txtDate;

private JTextField txtTime;

private JButton SaveCommand;

private JButton commandCloser;

private JButton ClearAll;

private JCheckBox checkBox;

private Driver reservationlist1;

private JPanel pnlCommand;

private JPanel pnlDisplay;

private EntryScreen ReservationEntry1;

// Constructor that takes a Driver object as input

public EntryScreen(Driver reservationlist1) {

this.reservationlist1 = reservationlist1;

// Initialize the necessary components

txttableNumber = new JTextField(20);

setTitle("Make a Reservation");

pnlCommand = new JPanel();

pnlDisplay = new JPanel();

// create the table model with column names

String[] columnNames = {"ID", "Name", "Date", "Time", "Capacity"};

DefaultTableModel model = new DefaultTableModel(columnNames, 0);

// create the table and set the model

table = new JTable(model);

// add the table to a scroll pane and add it to the GUI

JScrollPane scrollPane = new JScrollPane(table);

add(scrollPane, BorderLayout.CENTER);

// add labels and text fields to the display panel

pnlDisplay.add(new JLabel("Name:"));

txtName = new JTextField(20);

pnlDisplay.add(txtName);

pnlDisplay.add(new JLabel("Date:"));

txtDate = new JTextField(5);

pnlDisplay.add(txtDate);

pnlDisplay.add(new JLabel("Time:"));

txtTime = new JTextField(5);

pnlDisplay.add(txtTime);

pnlDisplay.add(new JLabel("Capacity:"));

txtcapacity = new JTextField(20);

pnlDisplay.add(txtcapacity);

// add the save and close buttons to the command panel

pnlCommand.setLayout(new GridLayout(1, 2));

SaveCommand = new JButton("Save");

commandCloser = new JButton("Close");

pnlCommand.add(SaveCommand);

pnlCommand.add(commandCloser);

// add the display and command panels to the GUI

add(pnlDisplay, BorderLayout.CENTER);

add(pnlCommand, BorderLayout.SOUTH);

// finalize the GUI and make it visible

pack();

setVisible(true);

// add action listeners to the buttons

commandCloser.addActionListener(new commandCloser());

SaveCommand.addActionListener(new SaveCommand());

// set this object to be the current instance of EntryScreen

ReservationEntry1 = this;

}

// ActionListener class for the close button

private class commandCloser implements ActionListener {

public void actionPerformed(ActionEvent d) {

ReservationEntry1.setVisible(false);

System.out.println("Close button clicked");

}

// ActionListener class for the save button

private class SaveCommand implements ActionListener {

public void actionPerformed(ActionEvent e) {

// generate a random ID

Random random = new Random();

int id = random.nextInt(10000) + 1;

// extract information from the text fields

String name = txtName.getText();

String[] Name = name.split(", ");

String tableNumberst = txttableNumber.getText();

int tableNumber = 0;

if (!tableNumberst.isEmpty()) {

try {

tableNumber = Integer.parseInt(tableNumberst);

} catch

(NumberFormatException ex) {

}

String Capacity = txtcapacity.getText();

int capacity = 0;

if (!Capacity.isEmpty()) {

try {

capacity = Integer.parseInt(Capacity);

} catch (NumberFormatException ex) {

System.out.println(" Error");

}

String date = txtDate.getText();

String time = txtTime.getText();

DefaultTableModel model = (DefaultTableModel) table

.getModel();

model.addRow(new Object[]{id, name, date, time, capacity});

table.repaint();

Reservation reservation = new Reservation(id, name, tableNumber, capacity, date, time);

reservationlist1.addReservation(reservation);

ReservationEntry1.setVisible(false);

// display ID in a dialog box

JOptionPane.showMessageDialog(null, "Reservation ID: " + id);

}

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