/*
Developer: James Goudy
The provided Java program defines a simple GUI application using
the Swing framework. The application displays several user interface
components such as a JTextField, JComboBox, JList, JTextArea, and
JButton within a main JFrame. Each component is positioned manually
using absolute positioning, as the layout manager is set to null.
The application demonstrates how to build a concatenated string from
various form elements, then display that result in a multi-line text area.
*/
package j2_textfield_combo_list_buildstring;
//import java.awt.List;
import java.awt.Color;
import java.awt.Font;
import java.util.List;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.ListSelectionModel;
/**
*
* @author jgoudy
*/
public class J2_Textfield_Combo_List_BuildString {
// creating our application frame and controls
static JFrame myFrame = new JFrame();
static JTextField myTextField = new JTextField();
static JComboBox myCombo = new JComboBox();
static JList myList = new JList();
static JButton myButton = new JButton();
static JTextArea myTextArea = new JTextArea();
static JMenuBar myMenuBar = new JMenuBar();
static JLabel myLabel = new JLabel();
static int xpos = 50;
static int ypos = 50;
static int spacing = 20;
public static void main(String[] args)
{
setupApp();
}
private static void setupApp()
{
// helper functions to build the
// Build the menubar first
// then add it to the frame
setupMenuBar();
setupFrame();
setupJLabel();
setupTextField();
setupCombo();
setupList();
setupTextArea();
setupButton();
}
private static void setupMenuBar(){
// Create a new "File" menu
JMenu myMenuFile = new JMenu("File");
// Create a new menu item (initially without text)
JMenuItem myMenuQuit = new JMenuItem();
// Set the text label for the Quit menu item
myMenuQuit.setText("Quit");
// demonstrate colors
myMenuQuit.setBackground(Color.yellow);
myMenuQuit.setForeground(Color.blue);
// adding the keyboard shortcut
// Set Ctrl+Q as shortcut
myMenuQuit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q,
KeyEvent.CTRL_DOWN_MASK ));
// Exit the program when selected
myMenuQuit.addActionListener(e -> System.exit(0));
// Add the Quit item to the File menu
myMenuFile.add(myMenuQuit);
// Make the menu bar visible and add the File menu to it
myMenuBar.setVisible(true);
myMenuBar.add(myMenuFile);
// Attach the menu bar to the main application frame
myFrame.setJMenuBar(myMenuBar);
}
private static void setupFrame()
{
// frame size 575 x 460
myFrame.setSize(575, 460);
// set location
myFrame.setLocationRelativeTo(null);
// set visibility
myFrame.setVisible(true);
// set close action
myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// layout manager
myFrame.setLayout(null);
// set title
myFrame.setTitle("Building Strings");
}
private static void setupJLabel(){
// set text
myLabel.setText("Building Strings");
// set fontsize
// Sets the label's font to bold with size 24,
// retaining the original font name.
// Retrieves the current font name and
// creates a new Font object with updated style and size.
myLabel.setFont(new Font(myLabel.getFont().getName(),Font.BOLD,24));
// set size
myLabel.setSize(200, myLabel.getFont().getSize()+ 4);
// set visibility
myLabel.setVisible(true);
// Set position
myLabel.setLocation(50, 10);
// add to frame
myFrame.add(myLabel);
}
private static void setupTextField()
{
// size 200 x 25
myTextField.setSize(200, 25);
// set location
myTextField.setLocation(xpos, ypos);
// set visibility
myTextField.setVisible(true);
// add to frame
myFrame.add(myTextField);
ypos = ypos + 25 + spacing;
}
private static void setupCombo()
{
// combo items
String[] myItems = {"Lions", "Tigers", "Bears"};
// size 200 x 25
myCombo.setSize(200, 25);
// set location
myCombo.setLocation(xpos, ypos);
// set visibility
myCombo.setVisible(true);
// add data
for (String value : myItems) {
myCombo.addItem(value);
}
// ALTERNATIVE WAY TO ADD DATA
// for(int i = 0; i < myItems.length; i++)
// {
// myCombo.addItem(myItems[i]);
// }
// add to frame
myFrame.add(myCombo);
ypos = ypos + 25 + spacing;
}
private static void setupList()
{
// combo items
String[] myItems = {"Planes", "Trains", "Automobiles", "Bikes"};
// size 200 x 210
myList.setSize(200, 210);
// set location
myList.setLocation(xpos, ypos);
// set visibility
myList.setVisible(true);
// multi select
myList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
// add data
DefaultListModel myListModel = new DefaultListModel();
// add data
for (String value : myItems) {
myListModel.addElement(value);
}
myList.setListData(myItems);
// add to frame
myFrame.add(myList);
}
private static void setupTextArea()
{
// size 200 x 260
myTextArea.setSize(200, 260);
// set location
myTextArea.setLocation(300, 90);
// set visibility
myTextArea.setVisible(true);
// Add to Frame
myFrame.add(myTextArea);
}
private static void setupButton()
{
// frame size 200 x 25
myButton.setSize(200, 25);
// set location
myButton.setLocation(300, 50);
// set visibility
myButton.setVisible(true);
// set text
myButton.setText("Create List");
// this is the button press
myButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e)
{
String myString = "";
// Build the string
myString = "TextField: " + myTextField.getText() + "\n";
myString = myString + "Combo: "
+ myCombo.getSelectedItem() + "\n";
List mySelectedItems = myList.getSelectedValuesList();
myString = myString + "ListBox: \n";
for (Object value : mySelectedItems) {
myString = myString + value + "\n";
}
myTextArea.setText(myString);
}
});
// ALTERNATIVE Way To Add Action Listener
// ActionListener myActionListener = new ActionListener() {
// @Override
// public void actionPerformed(ActionEvent e)
// {
// System.out.println("Hello World");
// }
// };
//
//
// myButton.addActionListener(myActionListener);
// add to frame
myFrame.add(myButton);
}
}
