Write the Java source code necessary to build a solution for the problem below:
ID: 3688335 • Letter: W
Question
Write the Java source code necessary to build a solution for the problem below:
In your new job you have been hired to be the user interface designer for the "We build it for you" company. Your job is to build a graphical user interface template so that the sales force can go out and demonstrate the possibilities for interfaces to many different types of customers. To that end you are then to create a GUI panel and draw six different shapes. Fill some of the shapes with your own choice of colors. Use the drawstring method to write "My Advanced GUI" on the panel.
Create three tab panels using JTabbedPane. In the first tab, create two buttons. Display a dialog box when the button is pressed indicating which button is pressed. In the second tab, display five radio buttons. Use a dialog box to indicate which radio button is selected. In the third tab, display four check boxes. Only one radio button should be selected at a time, but multiple checkboxes can be selected.
Use the JSplitPane to split the first GUI panel and the three tabbed panels.
Finally, add a menu bar to the GUI. The menu bar must have at least one item. Create the File menu, and add the exit sub menu to allow users to close the panel using the exit menu.
Explanation / Answer
import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import javax.swing.*;
/** Test JRadioButton, JCheckBox and JComboBox */
@SuppressWarnings("serial")
public class ButtonComboBoxDemo extends JFrame {
// private variables of GUI components
private JLabel lblForTest;
private String imgCrossFilename = "images/cross.gif";
private String lblText = "Cross";
private Icon iconCross;
private JRadioButton rbLeft, rbCenter, rbRight, rbTop, rbMiddle, rbBottom;
private JCheckBox cbText, cbIcon;
private JComboBox<String> comboColor;
/** Constructor to setup the UI components */
public ButtonComboBoxDemo() {
// Create a JLabel with text and icon for manipulation
URL imgURL = getClass().getClassLoader().getResource(imgCrossFilename);
if (imgURL != null) {
iconCross = new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + imgCrossFilename);
}
lblForTest = new JLabel(lblText, iconCross, SwingConstants.CENTER);
lblForTest.setOpaque(true);
lblForTest.setBackground(new Color(204, 238, 241));
lblForTest.setForeground(Color.RED);
lblForTest.setFont(new Font(Font.SANS_SERIF, Font.ITALIC, 18));
// Create radio buttons for setting horizontal alignment of the JLabel
rbLeft = new JRadioButton("Left");
rbLeft.setMnemonic(KeyEvent.VK_L);
rbCenter = new JRadioButton("Center", true); // selected
rbCenter.setMnemonic(KeyEvent.VK_C);
rbRight = new JRadioButton("Right");
rbRight.setMnemonic(KeyEvent.VK_R);
// Put the radio buttons into a ButtonGroup to ensure exclusive selection
ButtonGroup btnGroupH = new ButtonGroup();
btnGroupH.add(rbLeft);
btnGroupH.add(rbRight);
btnGroupH.add(rbCenter);
// Set up a JPanel to hold all radio buttons
JPanel pnlRbtnH = new JPanel(new GridLayout(1, 0)); // single row
pnlRbtnH.add(rbLeft);
pnlRbtnH.add(rbCenter);
pnlRbtnH.add(rbRight);
pnlRbtnH.setBorder(BorderFactory.createTitledBorder("Horizontal Alignment"));
// A ItemListener for all Radio buttons
ItemListener listener = new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
if (e.getStateChange() == ItemEvent.SELECTED) {
if (e.getSource() == rbLeft) {
lblForTest.setHorizontalAlignment(SwingConstants.LEFT);
} else if (e.getSource() == rbCenter) {
lblForTest.setHorizontalAlignment(SwingConstants.CENTER);
} else if (e.getSource() == rbRight) {
lblForTest.setHorizontalAlignment(SwingConstants.RIGHT);
}
}
}
};
rbLeft.addItemListener(listener);
rbCenter.addItemListener(listener);
rbRight.addItemListener(listener);
// Create radio buttons for setting vertical alignment of the JLabel
rbTop = new JRadioButton("Top");
rbTop.setMnemonic(KeyEvent.VK_T);
rbMiddle = new JRadioButton("Middle", true); // selected
rbMiddle.setMnemonic(KeyEvent.VK_M);
rbBottom = new JRadioButton("Bottom");
rbBottom.setMnemonic(KeyEvent.VK_B);
// Put the radio buttons into a ButtonGroup to ensure exclusive selection
ButtonGroup btnGroupV = new ButtonGroup();
btnGroupV.add(rbTop);
btnGroupV.add(rbMiddle);
btnGroupV.add(rbBottom);
// Set up a JPanel to hold all radio buttons
JPanel pnlRbtnV = new JPanel(new GridLayout(1, 0)); // single row
pnlRbtnV.add(rbTop);
pnlRbtnV.add(rbMiddle);
pnlRbtnV.add(rbBottom);
pnlRbtnV.setBorder(BorderFactory.createTitledBorder("Vertical Alignment"));
// Radio buttons also fire ActionEvent
rbTop.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
lblForTest.setVerticalAlignment(SwingConstants.TOP);
}
});
rbMiddle.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
lblForTest.setVerticalAlignment(SwingConstants.CENTER);
}
});
rbBottom.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
lblForTest.setVerticalAlignment(SwingConstants.BOTTOM);
}
});
// Create checkboxes for selecting text, icon, or both, or none
cbText = new JCheckBox("Text", true); // selected
cbText.setMnemonic(KeyEvent.VK_T);
cbIcon = new JCheckBox("Icon", true); // selected
cbIcon.setMnemonic(KeyEvent.VK_I);
cbIcon.setSelected(true);
// Set up a JPanel to hold all checkboxes
JPanel pnlCbox = new JPanel(new GridLayout(0, 1)); // single column
pnlCbox.add(cbText);
pnlCbox.add(cbIcon);
// Checkboxes fire ItemEvent. Use an anonymous inner class as ItemListener
cbText.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
// Need to handle both SELECTED and DESELECTED
if (e.getStateChange() == ItemEvent.SELECTED) {
lblForTest.setText(lblText);
} else {
lblForTest.setText("");
}
}
});
cbIcon.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
// Need to handle both SELECTED and DESELECTED
if (e.getStateChange() == ItemEvent.SELECTED) {
lblForTest.setIcon(iconCross);
} else {
lblForTest.setIcon(null);
}
}
});
// Create combobox (drop-down menu) for the foreground color of the JLabel
String[] strColors = {"Red", "Blue", "Green",
"Cyan", "Magenta", "Yellow", "Black"};
final Color[] colors = {Color.RED, Color.BLUE, Color.GREEN,
Color.CYAN, Color.MAGENTA, Color.YELLOW, Color.BLACK};
comboColor = new JComboBox<String>(strColors);
comboColor.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
if (e.getStateChange() == ItemEvent.SELECTED) {
lblForTest.setForeground(colors[comboColor.getSelectedIndex()]);
}
}
});
// Set up a JPanel for the combobox
JPanel pnlCombo = new JPanel(new FlowLayout());
pnlCombo.add(comboColor);
// Set up the content-pane with BorderLayout and adds the panels
Container cp = this.getContentPane();
cp.setLayout(new BorderLayout());
cp.add(lblForTest, BorderLayout.CENTER);
cp.add(pnlRbtnH, BorderLayout.NORTH);
cp.add(pnlRbtnV, BorderLayout.SOUTH);
cp.add(pnlCbox, BorderLayout.WEST);
cp.add(pnlCombo, BorderLayout.EAST);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("Button and ComboBox Demo");
setSize(400, 300); // or pack() the components
setLocationRelativeTo(null);
setVisible(true);
}
/** The entry main() method */
public static void main(String[] args) {
// Run GUI codes in the Event-Dispatching thread for thread safety
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new ButtonComboBoxDemo(); // Let the constructor do the job
}
});
}
}
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