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POCreating panels with radio buttons that change text using arrays
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copied!<p>I am currently stumped on how to use arrays to complete an assignment. I've looked through the forums and used google with little luck. I would really appreciate any advice that someone can spare. Thank you very much!:</p> <ol> <li><p>Create the arrays for my 2 sets of radio buttons as well as for the font sizes and for fonts</p></li> <li><p>Remove all references to individual JRadioButtons (style1, style2, ....size1, size2, etc.). Instead, array values must be used. Once you are done modifying all of your code I should only have to change the program in one place to change all aspects of the size. For instance, changing a value in your font array should change the font size option AND the label that displays that font size.</p></li> <li><p>The sizes of your JRadioButton arrays should be directly related to the length of your int and String arrays. So if I have six different sizes to choose from, you should have six JRadioButtons in your array.</p></li> <li><p>Test your code by adding two additional font styles to your styles array.</p></li> <li><p>Test your code by adding two additional sizes to your size array.</p></li> <li><p>You may have to modify your actionPerformed method to match that from the JRadioButtons example in Chapter 5 where you check for a specific event.</p></li> </ol> <p>So in my two arrays that I didn't already initialize, I made them size 7 to allow me to add two more sizes and two more fonts. I am stumped on how to call the index of the array in the actionListener. What would be a good tutorial for working with radio buttons and arrays?</p> <p>Here is my current code:</p> <pre><code>import javax.swing.*; import java.awt.*; import java.awt.event.*; public class StyleArrays extends JPanel implements ActionListener { //declare the labels, panels, variables and radio buttons private JLabel saying; private JRadioButton style1, style2, style3, style4; private JRadioButton size1, size2, size3, size4; private JPanel top, right, left; JRadioButton[] size = new JRadioButton[7]; JRadioButton[] font = new JRadioButton[7]; String[] fonts = {"Arial", "Thonburi", "Rockwell", "Century Gothic"}; int[] sizes = {18, 22, 26, 30}; //declare the variables used later in the code the set the font and style //private String myFont = "Arial"; //private int size = 18; //Constructor //----------------------------------------------------------------- public StyleArrays() { //set the layout of the Layouts panel that will contain all of the other panels setLayout (new BorderLayout()); setBackground (Color.red); //create the new panels that will go inside the Layouts panel top= new JPanel(); right= new JPanel(); left= new JPanel(); saying = new JLabel ("Say it with style!"); // saying.setFont (new Font (myFont, Font.PLAIN, size)); //set the layout and color of the top panel, and add the saying add(top, BorderLayout.NORTH); top.setBackground (Color.yellow); top.add(saying); //create size radio buttons size1 = new JRadioButton ("18", true); size1.setBackground (Color.red); size2 = new JRadioButton ("22"); size2.setBackground (Color.red); size3 = new JRadioButton ("26"); size3.setBackground (Color.red); size4 = new JRadioButton ("30"); size4.setBackground (Color.red); //add listeners for each size buttons size1.addActionListener (this); size2.addActionListener (this); size3.addActionListener (this); size4.addActionListener (this); //add these buttons to this button group ButtonGroup group1 = new ButtonGroup(); group1.add (size1); group1.add (size2); group1.add (size3); group1.add (size4); //set the layout and color of the left panel add(left, BorderLayout.WEST); //add the left panel to the border layout left.setLayout (new BoxLayout (left, BoxLayout.Y_AXIS)); //set the layout of left to box layout left.setBackground (Color.red); //set the color to red //display the buttons on the panel left.add (size1); left.add (size2); left.add (size3); left.add (size4); //This section deals with the panel that contains the STYLE information add(right, BorderLayout.EAST); //add the right panel to the border layout right.setLayout (new GridLayout (2, 2)); //set the layout of right panel to grid layout right.setBackground (Color.red); // set the background color of the panel to red //create style radio buttons style1 = new JRadioButton ("Arial", true); style1.setBackground (Color.red); style2 = new JRadioButton ("Thonburi"); style2.setBackground (Color.red); style3 = new JRadioButton ("Rockwell"); style3.setBackground (Color.red); style4 = new JRadioButton ("Century Gothic"); style4.setBackground (Color.red); //add listeners for each style button style1.addActionListener (this); style2.addActionListener (this); style3.addActionListener (this); style4.addActionListener (this); //add these buttons to this button group ButtonGroup group2 = new ButtonGroup(); group2.add (style1); group2.add (style2); group2.add (style3); group2.add (style4); //display the buttons on the panel right.add (style1); right.add (style2); right.add (style3); right.add (style4); } //***************************************************************** // Represents the listener for both check boxes. //***************************************************************** //***************************************************************** // Represents the listener for the radio buttons. //***************************************************************** public void actionPerformed (ActionEvent event) { Object source = event.getSource(); if (source == size1) //if the event is that the size1 button is selected size = 18; //assign 18 to the variable if (source == size2) size = 22; if (source == size3) size = 26; if (source == size4) size = 30; if (source == style1) myFont = "Arial"; if (source == style2) myFont = "Thonburi"; if (source == style3) myFont = "Rockwell"; if (source == style4) myFont = "Century Gothic"; saying.setFont (new Font (myFont, Font.PLAIN, size)); //display the saying with the current value of 'myFont' and 'style' } public static void main (String[] args) { JFrame frame = new JFrame ("Style Arrays"); frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); StyleArrays panel = new StyleArrays(); frame.getContentPane().add (panel); frame.pack(); frame.setVisible(true); } } </code></pre>

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