Exam 15: Advanced Gui Topics

Clicking an item in a list box results in a(n) ____.

Use the ____ layout manager when you need to add components that are displayed one at a time.

What is an adapter class?

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      {        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 JPanel s and a GridLayout are used to achieve this effect.

As you add new Components to a ____ , they are positioned in sequence from left to right  across each row.