Java Frame Change Button Colors Based on Even Odd Logic

Java Frame Change Button Colors Based on Even Odd Logic:

This code is continuation of this Java AWT BorderLayout Adding Label to Panel with Color.

Next up handling button press events and adding Sound to button clicks.


Sample:

GridLayout changing button colors
GridLayout changing button colors

 

Code:

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

/**
 * Created by asif on 8/13/2015.
 */
public class SimpleAwtGui {

    private static final int button_count = 10;

    // Declare a Frame type variable
    Frame frame;
    MenuBar menuBar;
    Menu fileMenu, optionsMenu, helpMenu;
    Panel panelUpperSection, panelLowerSection;
    Label labelButtonPressHeading, labelButtonPressed;

    // Create an array of Button type Objects
    Button [] button = new Button[button_count];

    public SimpleAwtGui() {
        // Create Frame Object and pass in the Frame Name / title
        frame = new Frame("AWT GUI EXAMPLE");

        // Create a panel object for organizing content
        panelUpperSection = new Panel();
        panelLowerSection = new Panel();

        // create Label
        labelButtonPressHeading = new Label();
        labelButtonPressed = new Label();

        // Use for loop to instantiate every button object
        for(int i = 0; i < button_count; ++i){
            button[i] = new Button( "" + i );

            // if i is odd then change the button color
            if(i % 2 == 1){
                button[i].setBackground(Color.BLACK);
                button[i].setForeground(Color.WHITE);
            }
        }

        // Create MenuBar Object
        menuBar = new MenuBar();

        // Create Menu objects to add to the MenuBar
        fileMenu = new Menu("File");
        optionsMenu = new Menu("Options");
        helpMenu = new Menu("Help");
    }

    public static void main(String[] args) {

        // Create an instance of SimpleAwtGui
        SimpleAwtGui window = new SimpleAwtGui();

        // call the showFrame() function to display the window
        window.showFrame();

    }

    // Not necessary but good practice all codes inside this can be written inside main
    public void showFrame() {
        // set the size of the window
        frame.setSize(400, 400);

        // set the layout for the window
        frame.setLayout(new GridLayout(2, 1));

        // Add panel to the frame
        frame.add(panelUpperSection);
        frame.add(panelLowerSection);

        // Set Layout for the panels
        panelUpperSection.setLayout(new BorderLayout());
        panelLowerSection.setLayout(new GridLayout());

        // Add Label to Panel
        panelUpperSection.add(labelButtonPressHeading, BorderLayout.NORTH);
        panelUpperSection.add(labelButtonPressed, BorderLayout.CENTER);

        labelButtonPressHeading.setBackground(Color.BLACK);
        labelButtonPressHeading.setText("Buttons clicked will be shown Below:");
        labelButtonPressHeading.setForeground(Color.WHITE);

        labelButtonPressed.setBackground(Color.darkGray);

        // Add all of the buttons to the layout
        for(int i = 0; i < button_count; ++i) {
            panelLowerSection.add(button[i]);
        }

        // Register window listener event to the frame without implementing WindowListener
        frame.addWindowListener(
                new WindowAdapter() {
                    public void windowClosing(WindowEvent e) {
                        System.exit(0);
                    }
                }
        );

        // Add Menu to the MenuBar
        menuBar.add(fileMenu);
        menuBar.add(optionsMenu);
        menuBar.add(helpMenu);

        /**
         * Add MenuItem to Menu
         */

        // Add items to File Menu
        fileMenu.add(new MenuItem("New"));
        fileMenu.add(new MenuItem("Open"));
        fileMenu.add(new MenuItem("Help"));

        // Add items to File Menu
        optionsMenu.add(new MenuItem("Options"));

        // Add items to File Menu
        helpMenu.add(new MenuItem("Help"));
        helpMenu.add(new MenuItem("About"));

        // Add MenuBar to the Frame
        frame.setMenuBar(menuBar);

        // set the frame visible otherwise nothing will be shown
        frame.setVisible(true);
    }
}
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