I am having trouble adding to the Center of the BorderLayout. Nothing appears on a couple of the screens. This code is still in the works, but it is being designed for a car rental service. We are connecting our code to the JDBC eventually and going to have the database return the corresponding results. The code is ideally supposed to show multiple screens for the user when they use the service. One screen will have them input their information, another to filter through different car options, and then the end result is to display the results returned by the database that is connected. I am adding multiple panels to the center of the BorderLayout but I do not initially set them to be visible. They will become visible when buttons are pressed.
//The following is the beginning of our code. It is not complete yet
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.sql.*;
import java.util.Scanner;
public class Rental extends JFrame implements ActionListener, Customer, Car
{
Container cont = getContentPane();
Font myFont = new Font("tester ", Font.BOLD, 34);
BorderLayout border = new BorderLayout();
FlowLayout flow = new FlowLayout();
GridLayout grid1 = new GridLayout(0,1);
JPanel testPanel = new JPanel(); //Panel where I tried to add to center
/* myDrive logo */
JButton custom;
/*Opening Screen: */
JPanel welcomePnl = new JPanel();
JLabel titleLbl = new JLabel("");
//This is a draft summary//
JLabel info = new JLabel(" Welcome to myDrive!. myDrive is a car rental application designed for you to choose a car based on your preferences.");
JPanel btnPnl = new JPanel();
JPanel btnPnl2 = new JPanel(); //contains Car instead of begin
JCheckBox yesBox = new JCheckBox("Agree to Terms & Conditions");
JCheckBox noBox = new JCheckBox(" Do Not Agree");
/* Rental Panel--Screen 2: Fields for user to enter for rental*/
JPanel rentalPnl = new JPanel();
JTextField nameField = new JTextField("First Name");
JTextField lastName = new JTextField("Last Name");
JButton carBtn = new JButton("Car"); //continues next
/*Car Panel--Screen 3: Car panel for car options*/
JPanel carPnl = new JPanel();
JPanel brandPnl = new JPanel(); //brands
JPanel colorPnl = new JPanel(); //colors
JLabel carLbl = new JLabel("Welcome to the Car selection screen:");
JCheckBox brand1 = new JCheckBox("BMW");
JCheckBox brand2 = new JCheckBox("Mercedez");
JCheckBox brand3 = new JCheckBox("Tesla");
JCheckBox brand4 = new JCheckBox("Ford");
JCheckBox brand5 = new JCheckBox("Chrystler");
JCheckBox color1 = new JCheckBox("Black");
JCheckBox color2 = new JCheckBox("Silver");
JCheckBox color3 = new JCheckBox("Red");
JCheckBox color4 = new JCheckBox("Blue");
JCheckBox drive1 = new JCheckBox("AWD");
JCheckBox drive2 = new JCheckBox("TWD");
JButton beginBtn = new JButton("Begin");
JButton exitBtn = new JButton("Exit");
//Constructor
public Rental()
{
super("MyDrive");
cont.add(testPanel, BorderLayout.CENTER);
testPanel.setBackground(Color.PINK);
cont.setLayout(border); //border layout for the container
//Opening Screen
beginBtn.addActionListener(this);
beginBtn.setToolTipText("Being your rental process");
exitBtn.addActionListener(this);
welcomePnl.setBackground(Color.GRAY);
welcomePnl.add(titleLbl);
welcomePnl.add(info);
info.setVisible(true);
cont.add(info, BorderLayout.CENTER);
cont.add(welcomePnl, BorderLayout.NORTH);
titleLbl.setFont(myFont);
cont.add(btnPnl, BorderLayout.SOUTH);
btnPnl.setLayout(flow);
btnPnl.setBackground(Color.black);
btnPnl.add(beginBtn);
beginBtn.setVisible(false);
btnPnl.add(carBtn);
carBtn.setVisible(false);
btnPnl.add(exitBtn);
nameField.setVisible(false);
lastName.setVisible(false);
carBtn.addActionListener(this);
carBtn.setVisible(false);
rentalPnl.add(carBtn, BorderLayout.SOUTH);
rentalPnl.add(nameField);
rentalPnl.add(lastName);
rentalPnl.setLayout(flow);
cont.add(rentalPnl);
// for logo//
Icon b = new ImageIcon(getClass().getResource("myDrive.png"));
custom= new JButton(b);
welcomePnl.add(custom);
welcomePnl.add(yesBox);
welcomePnl.add(noBox);
yesBox.addActionListener(this);
noBox.addActionListener(this);
//carPnl.add(carLbl, BorderLayout.NORTH);
brandPnl.setLayout(grid1);
brandPnl.setVisible(false);
brandPnl.setBackground(Color.GRAY);
brandPnl.add(brand1);
brandPnl.add(brand2);
brandPnl.add(brand3);
brandPnl.add(brand4);
brandPnl.add(brand5);
colorPnl.setLayout(grid1);
colorPnl.setVisible(false);
colorPnl.setBackground(Color.GRAY);
colorPnl.add(color1);
colorPnl.add(color2);
colorPnl.add(color3);
colorPnl.add(color4);
carPnl.add(drive1);
carPnl.add(drive2);
carPnl.setVisible(false);
cont.add(brandPnl, border.EAST);
cont.add(colorPnl, border.WEST);
cont.add(carPnl);
carLbl.setVisible(false);
}
@Override
public void actionPerformed(ActionEvent e)
{
Object source = e.getSource();
if (source == yesBox)
{
beginBtn.setVisible(true);
}
if(source == noBox)
{
System.exit(0);
}
if(source == beginBtn)
{
welcomePnl.setVisible(false);
btnPnl.setVisible(true);
btnPnl.remove(beginBtn);
btnPnl.add(carBtn);
carBtn.setVisible(true);
rentalPnl.setVisible(true);
nameField.setVisible(true);
String fName = nameField.getText();
lastName.setVisible(true);
String lName = lastName.getText();
}
if(nameField != null & lastName != null && source == carBtn)
{
carBtn.setEnabled(true);
rentalPnl.setVisible(false);
carLbl.setVisible(true);
brandPnl.setVisible(true);
colorPnl.setVisible(true);
cont.add(carLbl, border.NORTH);
}
if(source == exitBtn)
System.exit(0);
}
//Main Method
//Sets the size of the myDrive screen- size is not resizable (cannot be changed while using program)
public static void main(String[] args)
{
Rental r1 = new Rental(); //new rental
r1.setSize(600,600);
r1.setVisible(true);
r1.setDefaultCloseOperation(EXIT_ON_CLOSE);
r1.setResizable(false);
try {
// to get a connection to the SQL database//
String dbUrl = "jcbc:mysql://localhost:3306/demo";
String user = "student";
String password= "student";
Connection myConn = DriverManager.getConnection(dbUrl, user, password);
//a statement object, to execute the SQL query
Statement myStmt = myConn.createStatement();
//insert a new employee//
System.out.println("Inserting a new employee to database\n");
//using the statement object to insert data, the executeUpdate statemnt is a method to handle any update to the database, can be used for insert, update, and deletes//
//demo code below//
/*int rowsAffected = myStmt.executeUpdate(
//"insert into employees " + "(last_name, first_name, email, department, salary)" + "values" + "('Wright, 'Eric', '[email protected]', 'HR', 33000.00)"
//);
"insert into employees " + "(last_name, first_name, email, department, salary)" + "values" + "(" + name2 + "," + name1 + "," + onlinemail + ")"
);
*/
//this will return a result set//
ResultSet myRs = myStmt.executeQuery("select * from employees order by last_name");
// Process the result set, reads data from each row
// getter method to print out the last and first name from the result set//
while (myRs.next())
{
System.out.println(myRs.getString("last_name") + ", " + myRs.getString(("first_name")));
}
}
catch (Exception exc) {
exc.printStackTrace();
}
/*
finally {
if (myRs != null)
{
myRs.close();
}
}
*/
}
public String getBrand()
{
return null;
}
@Override
public String getColor()
{
return null;
}
@Override
public int getYear()
{
return 0;
}
@Override
public int getMiles()
{
return 0;
}
@Override
public String getDriveType()
{
return null;
}
}
Try to set the layout before adding components using the layout:
cont.setLayout(border); //border layout for the container
cont.add(testPanel, BorderLayout.CENTER);