The files must be named as: YourNameChapter18.java The squence of the windows ab
ID: 3543521 • Letter: T
Question
The files must be named as: YourNameChapter18.java
The squence of the windows above most show when actions 1, 2, 3, and 4 listed below.
Write a complete program named Buttons that implements a window with three buttons
The squence of the windows above most show when actions 1, 2, 3, and 4 listed below. Write a complete program named Buttons that implements a window with three buttons - left, blue, and reset. When the left button is clicked, the window's contents (the three buttons) shifts left. When the blue button is clicked, the window's background color changes to blue. When the reset button is clicked, the window's contents shifts back to the original center alignment and the window's background color changes back to its original color. In implementing the reset functionality, don't try to figure out a color constant that's used for the window's original color value. That's counterproductive because the color might be different on different computers. Instead, retrieve and save the window's original color and then when the color needs to be reset, use that saved original color value. 1. Original display: 2. After Left button is clicked: 3. After Blue button is clicked: 4. After Reset button is clicked: As always: Limit your use of class variables and instance variables - only use them if appropriate. Use appropriate modifiers for your methods. The modifiers we've discussed are private, public, protected, static, and final. Use helping methods if appropriate. Mimic the sample session precisely. In particular, note the window's title, the window's size, and the positions of components.Explanation / Answer
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Buttons extends JFrame
{
//Control Definitions JButton resetButton;
JButton leftButton; JButton colorButton;
JPanel buttonPanel;
// Layout Definiton
eventHandle evt;
FlowLayout flt;
Point point; //to Hold Previous Window Position
Color color; //to Hold Previous Color
public Buttons()
{
super("Buttons Window");
flt = new FlowLayout();//inialize the Flow Layout
buttonPanel = new JPanel(flt);//inialize the buttonPanel With Flow Layout
//initialize buttons
resetButton = new JButton("Reset");
leftButton = new JButton("Left");
colorButton = new JButton("Blue");
evt = new eventHandle(); //initiate the eventhandle class
buttonPanel.add(leftButton); //add leftButton
buttonPanel.add(colorButton);//add colorButton
buttonPanel.add(resetButton);//add colorButton
getContentPane().add(buttonPanel);//buttonPanel
//add actionlistners
leftButton.addActionListener(evt);
colorButton.addActionListener(evt);
resetButton.addActionListener(evt);
setBounds(20, 120, 250, 70);
//following Initate the point with Center of Scren
point=new Point((Toolkit.getDefaultToolkit().getScreenSize().width- getWidth())/2, (Toolkit.getDefaultToolkit().getScreenSize().height-getHeight())/2);
setLocation(point); //locates the window in center
color = buttonPanel.getBackground();//stores the initial color
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
class eventHandle implements ActionListener
{ //Event Handler
public void actionPerformed(ActionEvent e)
{
{ if (e.getSource() == leftButton) ///if its from leftButton
{
setLocation( (point.x +150), point.y);//shift the window 150 pixels left
}
else if (e.getSource() == colorButton)
{
buttonPanel.setBackground(color.BLUE); //sets the backgorund to Blue
}
else
{
setLocation(point); //sets the location to previous location
buttonPanel.setBackground(color); //sets the background to previous color
}
}
}
}
public static void main(String[] args)
{
Buttons btnwindow = new Buttons();
}
}
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