2. Write a Java application to display the following GUI. At this point you are

Question

2. Write a Java application to display the following GUI. At this point you are only implementing the display.It should look like this:

This program has the following requirements:

1. The textfield should accommodate 3 characters.

2. The V1 and V2 labels should be next to the corresponding textfields.

Hint: Put each label and its adjacent text field into a panel, then put both panels into another panel!

3. The buttons should have 10 pixels horizontal spacing and 5 pixels vertical spacing.

4. For the layout of the JFrame, use FlowLayout( FlowLayout.CENTER, 10, 5).

5. Your application should be implemented in a single class. The main method of the class does nothing more than create an object of the class. The constructor of the class creates and displays the GUI. The constructor may call other methods of the class if needed.

6. Do not use inheritance for this program. Use a JFrame member variable as the main window object for this program.

PLEASE PROVIDE A "SCREEN SHOT" FOR PROGRAM!!!!!!

Explanation / Answer

import javax.swing.*; import java.awt.Color; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; public class ButtonDemo_Extended implements ActionListener{ // Definition of global values and items that are part of the GUI. int redScoreAmount = 0; int blueScoreAmount = 0; JPanel titlePanel, scorePanel, buttonPanel; JLabel redLabel, blueLabel, redScore, blueScore; JButton redButton, blueButton, resetButton; public JPanel createContentPane (){ // We create a bottom JPanel to place everything on. JPanel totalGUI = new JPanel(); totalGUI.setLayout(null); // Creation of a Panel to contain the title labels titlePanel = new JPanel(); titlePanel.setLayout(null); titlePanel.setLocation(10, 0); titlePanel.setSize(250, 30); totalGUI.add(titlePanel); redLabel = new JLabel("Red Team"); redLabel.setLocation(0, 0); redLabel.setSize(120, 30); redLabel.setHorizontalAlignment(0); redLabel.setForeground(Color.red); titlePanel.add(redLabel); blueLabel = new JLabel("Blue Team"); blueLabel.setLocation(130, 0); blueLabel.setSize(120, 30); blueLabel.setHorizontalAlignment(0); blueLabel.setForeground(Color.blue); titlePanel.add(blueLabel); // Creation of a Panel to contain the score labels. scorePanel = new JPanel(); scorePanel.setLayout(null); scorePanel.setLocation(10, 40); scorePanel.setSize(260, 30); totalGUI.add(scorePanel); redScore = new JLabel(""+redScoreAmount); redScore.setLocation(0, 0); redScore.setSize(120, 30); redScore.setHorizontalAlignment(0); scorePanel.add(redScore); blueScore = new JLabel(""+blueScoreAmount); blueScore.setLocation(130, 0); blueScore.setSize(120, 30); blueScore.setHorizontalAlignment(0); scorePanel.add(blueScore); // Creation of a Panel to contain all the JButtons. buttonPanel = new JPanel(); buttonPanel.setLayout(null); buttonPanel.setLocation(10, 80); buttonPanel.setSize(260, 70); totalGUI.add(buttonPanel); // We create a button and manipulate it using the syntax we have // used before. Now each button has an ActionListener which posts // its action out when the button is pressed. redButton = new JButton("Red Score!"); redButton.setLocation(0, 0); redButton.setSize(120, 30); redButton.addActionListener(this); buttonPanel.add(redButton); blueButton = new JButton("Blue Score!"); blueButton.setLocation(130, 0); blueButton.setSize(120, 30); blueButton.addActionListener(this); buttonPanel.add(blueButton); resetButton = new JButton("Reset Score"); resetButton.setLocation(0, 40); resetButton.setSize(250, 30); resetButton.addActionListener(this); buttonPanel.add(resetButton); totalGUI.setOpaque(true); return totalGUI; } // This is the new ActionPerformed Method. // It catches any events with an ActionListener attached. // Using an if statement, we can determine which button was pressed // and change the appropriate values in our GUI. public void actionPerformed(ActionEvent e) { if(e.getSource() == redButton) { redScoreAmount = redScoreAmount + 1; redScore.setText(""+redScoreAmount); } else if(e.getSource() == blueButton) { blueScoreAmount = blueScoreAmount + 1; blueScore.setText(""+blueScoreAmount); } else if(e.getSource() == resetButton) { redScoreAmount = 0; blueScoreAmount = 0; redScore.setText(""+redScoreAmount); blueScore.setText(""+blueScoreAmount); } } private static void createAndShowGUI() { JFrame.setDefaultLookAndFeelDecorated(true); JFrame frame = new JFrame("[=] JButton Scores! [=]"); //Create and set up the content pane. ButtonDemo_Extended demo = new ButtonDemo_Extended(); frame.setContentPane(demo.createContentPane()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(280, 190); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }

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