Contoh Program sederhana berikut ini mencoba menampilkan inputan RadioButton
dengan menggunakan Java. Class yang digunakan adalah JRadioButton.
Di dalam program juga dicontohkan penanganan event dengan ItemListener.
Berikut ini programnya:
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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public class RadioButtonTest
extends JFrame {
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private JTextField
text;
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private Font
plainFont, boldFont, italicFont;
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private JRadioButton
plainButton, boldButton, italicButton;
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private ButtonGroup
radioGroup;
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public RadioButtonTest()
{
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super ("Mencoba
Radio button");
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Container
container = getContentPane();
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container.setLayout(new FlowLayout());
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text
= new JTextField ("Lab. Bahasa Pemrograman 3", 20);
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text.setHorizontalAlignment(SwingConstants.CENTER);
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container.add(text);
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plainButton
= new JRadioButton ("Plain", true);
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container.add(plainButton);
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boldButton
= new JRadioButton ("Bold", false);
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container.add(boldButton);
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italicButton
= new JRadioButton ("Italic", false);
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container.add(italicButton);
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radioGroup
= new ButtonGroup();
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radioGroup.add(plainButton);
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radioGroup.add(boldButton);
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radioGroup.add(italicButton);
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plainFont
= new Font ("Verdana",Font.PLAIN, 14);
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boldFont
= new Font ("Verdana",Font.BOLD, 14);
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italicFont
= new Font ("Verdana",Font.ITALIC, 14);
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text.setFont(plainFont);
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plainButton.addItemListener(new RadioButtonHandler
(plainFont));
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boldButton.addItemListener(new RadioButtonHandler
(boldFont));
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italicButton.addItemListener(new RadioButtonHandler
(italicFont));
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setSize
(300,100);
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setLocationRelativeTo(null);
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setVisible(true);
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}
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public static void main
(String args[]) {
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RadioButtonTest
test = new RadioButtonTest();
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test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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}
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//inner
class
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private class RadioButtonHandler
implements ItemListener {
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private Font
font;
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public RadioButtonHandler
(Font f) {
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font
= f;
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}
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public void itemStateChanged
(ItemEvent e) {
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text.setFont(font);
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}
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}
//end of inner class
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} //end of outer
class
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Thanks for reading & sharing KEPOIN IT
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