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POJava- Adding Radio Buttons using AWT?
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copied!<p>This program has 2 radio buttons. 1: for a circle and 2: for outputting a square.</p> <p>This program is basically designed to either output a cirlce or square based off a radio button group.</p> <p>My issue is that I don't know how to implement an action listener onto the buttons in-order to output the shape. There are errors within initializing the radio buttons when I invoked the method fm. Apparently I think I need a main method.</p> <p><em>Bear in mind this is java AWT.</em></p> <p><strong>Please comment if you want me to add more details or clarify.</strong></p> <pre><code> import java.awt.*; import java.awt.event.*; import java.applet.*; import java.applet.Applet; public class RadioButton extends Applet implements ActionListener { int choice; Frame fm = new Frame ("RadioButton Group"); Label la = new Label ("What shape do you want to draw?:"); fm.setLayout (new GridLayout (0, 1)); CheckboxGroup cg1 = new CheckboxGroup (); fm.add (la); fm.add (new Checkbox ("CIRCLE", cg1, true)); fm.add (new Checkbox ("SQUARE", cg1, true)); fm.setSize (250, 200); fm.setVisible (true); fm.addWindowListener (new WindowAdapter () { public void paint (Graphics g) // How can you 'update the drawing' or repaint it? { switch (choice) // Maybe for colors if all else fails you can add a switch 'within' a switch. Inefficient-yes but helps. { case 1: if (choice == 1) g.fillOval (30, 40, 20, 20); case 2: if (choice == 2) g.fillRect (20, 40, 20, 20); break; } } public void actionPerformed (ActionEvent evt) { if (evt.getSource () == "CIRCLE") choice = 1; else choice = 2; } public void windowClosing (WindowEvent we) { System.exit (0); } } ); } } </code></pre>

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