Task #1 Creating a GUI 1. Import the required Java libraries. 2. Create a class

Question

Task #1 Creating a GUI
1. Import the required Java libraries.
2. Create a class called ColorFactory that inherits from JFrame.
3. Create named constants for a width of 500 and height of 300 for the frame.
4. Write a default constructor that does the following
a. Set the title of the window to Color Factory.
b. Set the size of the window using the constants.
c. Specify what happens when the close button is clicked.
d. Get the content pane of the JFrame and set the layout manager to border layout.
e. Call the method to build the top panel (to be written as directed below).
f. Add the panel to the north part of the content pane.
g. Call the method to build the bottom panel (to be written as directed below).
h. Add this panel to the south part of the content pane.
i. Create a label that contains the message

Explanation / Answer

import javax.swing.*; import java.awt.*; import java.awt.event.*; public class ColorFactory extends JFrame { private JLabel messageLabel; private JButton redButton; private JButton orangeButton; private JButton yellowButton; private JRadioButton greenButton; private JRadioButton blueButton; private JRadioButton cyanButton; private ButtonGroup radioButtonGroup; private JPanel panel; private JPanel panel1; private JPanel panel2; private final int WINDOW_WIDTH = 500; private final int WINDOW_HEIGHT = 300; public ColorFactory() { setTitle("Color Factory"); setSize(WINDOW_WIDTH, WINDOW_HEIGHT); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLayout(new BorderLayout(0, 10)); messageLabel = new JLabel("Top buttons change the panel color and bottom radio buttons change the text color."); redButton = new JButton("Red"); orangeButton = new JButton("Orange"); yellowButton = new JButton("Yellow"); greenButton = new JRadioButton("Green"); blueButton = new JRadioButton("Blue"); cyanButton = new JRadioButton("Cyan"); radioButtonGroup = new ButtonGroup(); radioButtonGroup.add(greenButton); radioButtonGroup.add(blueButton); radioButtonGroup.add(cyanButton); redButton.addActionListener(new ButtonListener()); orangeButton.addActionListener(new ButtonListener()); yellowButton.addActionListener(new ButtonListener()); greenButton.addActionListener(new RadioButtonListener()); blueButton.addActionListener(new RadioButtonListener()); cyanButton.addActionListener(new RadioButtonListener()); panel = new JPanel(); panel1 = new JPanel(); panel2 = new JPanel(); panel2.add(messageLabel); panel.add(redButton); panel.add(orangeButton); panel.add(yellowButton); panel1.add(greenButton); panel1.add(blueButton); panel1.add(cyanButton); redButton.setBackground(Color.RED); orangeButton.setBackground(Color.ORANGE); yellowButton.setBackground(Color.YELLOW); greenButton.setForeground(Color.GREEN); blueButton.setForeground(Color.BLUE); cyanButton.setForeground(Color.CYAN); panel.setBackground(Color.WHITE); panel1.setBackground(Color.WHITE); add(panel, BorderLayout.NORTH); add(panel1, BorderLayout.SOUTH); add(panel2, BorderLayout.CENTER); setVisible(true); } private class ButtonListener implements ActionListener { public void actionPerformed(ActionEvent e) { String actionCommand = e.getActionCommand(); if (actionCommand.equals("Red")) { panel2.setBackground(Color.RED); } else if (actionCommand.equals("Orange")) { panel2.setBackground(Color.ORANGE); } else if (actionCommand.equals("Yellow")) { panel2.setBackground(Color.YELLOW); } } } private class RadioButtonListener implements ActionListener { public void actionPerformed(ActionEvent e) { String actionCommand = e.getActionCommand(); if (actionCommand.equals("Green")) { messageLabel.setForeground(Color.GREEN); } else if (actionCommand.equals("Blue")) { messageLabel.setForeground(Color.BLUE); } else if (actionCommand.equals("Cyan")) { messageLabel.setForeground(Color.CYAN); } } } public static void main(String[] args) { ColorFactory cw = new ColorFactory(); } }

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