Import Java.awt.*; Import Javax.swing.*;

question 40

Essay

import java.awt.*;
import javax.swing.*;
import java.awt.Color;
public class Checkerboard extends JFrame
{
private final int ROWS = 8;
private final int COLS = 8;
private final int GAP = 2;
private final int NUM = ROWS * COLS;
private int x;
private JPanel pane = new JPanel
(new GridLayout(ROWS, COLS, GAP, GAP));
private JPanel[] panel = new JPanel[NUM];
private Color color1 = Color.WHITE;
private Color color2 = Color.BLUE;
private Color tempColor;
public Checkerboard()
{
super("Checkerboard");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
add(pane);
for(x = 0; x < NUM; ++x)
{
panel[x] = new JPanel();
pane.add(panel[x]);
if(x % COLS == 0)
{
tempColor = color1;
color1 = color2;
color2 = tempColor;
}
if(x % 2 == 0)
panel[x].setBackground(color1);
else
panel[x].setBackground(color2);
}
}
public static void main(String[] args)
{
Checkerboard frame = new Checkerboard();
final int SIZE = 300;
frame.setSize(SIZE, SIZE);
frame.setVisible(true);
}
}
The above code creates a loop to fill even-positioned squares with one color and odd-positioned squares with another color, resulting in a checkerboard pattern. Describe how JPanels and a GridLayout are used to achieve this effect.

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Definitions:

Standard Labor Rate

A predetermined rate used to allocate labor costs to products or services, based on the expected or average wage rate for labor.

Employment Taxes

Taxes that employers are required to pay on behalf of their employees, such as social security and Medicare taxes.

Variable Overhead Efficiency Variance

A measure of the efficiency with which variable overhead resources are utilized, calculated by comparing the actual usage against the budgeted or standard usage.

Standard Price

A predetermined cost assigned to materials, labor, and overhead used in budgeting and variance analysis.