Java examples for Swing:JRadioButton
Icon image change within radio button click
/*/*from ww w . j a v a 2 s . co m*/ * LunarPhasesRB.java requires the following files: * images/image0.jpg * images/image1.jpg * images/image2.jpg * images/image3.jpg * images/image4.jpg * images/image5.jpg * images/image6.jpg * images/image7.jpg * It is a modified version of LunarPhases.java that * uses radio buttons instead of a combo box. */ import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.net.URL; public class LunarPhasesRB implements ActionListener { final static int NUM_IMAGES = 8; final static int START_INDEX = 3; ImageIcon[] images = new ImageIcon[NUM_IMAGES]; JPanel mainPanel, selectPanel, displayPanel; JLabel phaseIconLabel = null; public LunarPhasesRB() { //Create the phase selection and display panels. selectPanel = new JPanel(); displayPanel = new JPanel(); //Add various widgets to the sub panels. addWidgets(); //Create the main panel to contain the two sub panels. mainPanel = new JPanel(); mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.PAGE_AXIS)); mainPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5)); //Add the select and display panels to the main panel. mainPanel.add(selectPanel); mainPanel.add(displayPanel); } /* * Get the images and set up the widgets. */ private void addWidgets() { /* * Create a label for displaying the moon phase images and * put a border around it. */ phaseIconLabel = new JLabel(); phaseIconLabel.setHorizontalAlignment(JLabel.CENTER); phaseIconLabel.setVerticalAlignment(JLabel.CENTER); phaseIconLabel.setVerticalTextPosition(JLabel.CENTER); phaseIconLabel.setHorizontalTextPosition(JLabel.CENTER); phaseIconLabel.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createLoweredBevelBorder(), BorderFactory.createEmptyBorder(5, 5, 5, 5))); phaseIconLabel.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createEmptyBorder(0, 0, 10, 0), phaseIconLabel.getBorder())); //Create radio buttons with lunar phase choices. JRadioButton newButton = new JRadioButton("New"); newButton.setActionCommand("0"); newButton.setSelected(true); JRadioButton waxingCrescentButton = new JRadioButton( "Waxing Crescent"); waxingCrescentButton.setActionCommand("1"); JRadioButton firstQuarterButton = new JRadioButton("First Quarter"); firstQuarterButton.setActionCommand("2"); JRadioButton waxingGibbousButton = new JRadioButton( "Waxing Gibbous"); waxingGibbousButton.setActionCommand("3"); JRadioButton fullButton = new JRadioButton("Full"); fullButton.setActionCommand("4"); JRadioButton waningGibbousButton = new JRadioButton( "Waning Gibbous"); waningGibbousButton.setActionCommand("5"); JRadioButton thirdQuarterButton = new JRadioButton("Third Quarter"); thirdQuarterButton.setActionCommand("6"); JRadioButton waningCrescentButton = new JRadioButton( "Waning Crescent"); waningCrescentButton.setActionCommand("7"); // Create a button group and add the radio buttons. ButtonGroup group = new ButtonGroup(); group.add(newButton); group.add(waxingCrescentButton); group.add(firstQuarterButton); group.add(waxingGibbousButton); group.add(fullButton); group.add(waningGibbousButton); group.add(thirdQuarterButton); group.add(waningCrescentButton); // Display the first image. phaseIconLabel.setIcon(new ImageIcon("images/image0.jpg")); phaseIconLabel.setText(""); //Make the radio buttons appear in a center-aligned column. selectPanel.setLayout(new BoxLayout(selectPanel, BoxLayout.PAGE_AXIS)); selectPanel.setAlignmentX(Component.CENTER_ALIGNMENT); //Add a border around the select panel. selectPanel.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createTitledBorder("Select Phase"), BorderFactory.createEmptyBorder(5, 5, 5, 5))); //Add a border around the display panel. displayPanel.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createTitledBorder("Display Phase"), BorderFactory.createEmptyBorder(5, 5, 5, 5))); //Add image and moon phases radio buttons to select panel. displayPanel.add(phaseIconLabel); selectPanel.add(newButton); selectPanel.add(waxingCrescentButton); selectPanel.add(firstQuarterButton); selectPanel.add(waxingGibbousButton); selectPanel.add(fullButton); selectPanel.add(waningGibbousButton); selectPanel.add(thirdQuarterButton); selectPanel.add(waningCrescentButton); //Listen to events from the radio buttons. newButton.addActionListener(this); waxingCrescentButton.addActionListener(this); firstQuarterButton.addActionListener(this); waxingGibbousButton.addActionListener(this); fullButton.addActionListener(this); waningGibbousButton.addActionListener(this); thirdQuarterButton.addActionListener(this); waningCrescentButton.addActionListener(this); } // Load the selected image (lazy image loading). public void actionPerformed(ActionEvent event) { phaseIconLabel.setIcon(new ImageIcon("images/image" + event.getActionCommand() + ".jpg")); } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Create a new instance of LunarPhasesRB. LunarPhasesRB phases = new LunarPhasesRB(); //Create and set up the window. JFrame lunarPhasesFrame = new JFrame("Lunar Phases"); lunarPhasesFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); lunarPhasesFrame.setContentPane(phases.mainPanel); //Display the window. lunarPhasesFrame.pack(); lunarPhasesFrame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } } /* * Copyright (c) 1995, 2008, Oracle and/or its affiliates. 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