J ButtonHtmlDemo.java（发布8版）

J ButtonHtmlDemo.java (发布 8)
package swingnodesample;
 
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.ImageIcon;
 
/* 
 * ButtonHtmlDemo.java使用以下文件:
 *   images/right.gif
 *   images/middle.gif
 *   images/left.gif
 */
public class ButtonHtml extends JPanel
                            implements ActionListener {
    protected JButton b1, b2, b3;
 
    public ButtonHtml() {
        ImageIcon leftButtonIcon = createImageIcon("images/right.gif");
        ImageIcon middleButtonIcon = createImageIcon("images/middle.gif");
        ImageIcon rightButtonIcon = createImageIcon("images/left.gif");
        
        b1 = new JButton("<html><center><b><u>禁用</u></b><br>"
                         + "<font color=#ffffdd>中间按钮</font>", 
                         leftButtonIcon);
        Font font = b1.getFont().deriveFont(Font.PLAIN);
        b1.setFont(font);
        b1.setVerticalTextPosition(AbstractButton.CENTER);
        b1.setHorizontalTextPosition(AbstractButton.LEADING); //aka LEFT, for left-to-right locales
        b1.setMnemonic(KeyEvent.VK_D);
        b1.setActionCommand("disable");
 
        b2 = new JButton("中间按钮", middleButtonIcon);
        b2.setFont(font);
        b2.setForeground(new Color(0xffffdd));
        b2.setVerticalTextPosition(AbstractButton.BOTTOM);
        b2.setHorizontalTextPosition(AbstractButton.CENTER);
        b2.setMnemonic(KeyEvent.VK_M);
 
        b3 = new JButton("<html><center><b><u>启用</u></b><br>"
                         + "<font color=#ffffdd>中间按钮</font>", 
                         rightButtonIcon);
        b3.setFont(font);
        //Use the default text position of CENTER, TRAILING (RIGHT).
        b3.setMnemonic(KeyEvent.VK_E);
        b3.setActionCommand("enable");
        b3.setEnabled(false);
 
        //Listen for actions on buttons 1 and 3.
        b1.addActionListener(this);
        b3.addActionListener(this);
 
        b1.setToolTipText("点击此按钮禁用中间按钮。");
        b2.setToolTipText("点击此中间按钮时不会有任何反应。");
        b3.setToolTipText("点击此按钮启用中间按钮。");
 
        //Add Components to this container, using the default FlowLayout.
        add(b1);
        add(b2);
        add(b3);
    }
 
    @Override
    public void actionPerformed(ActionEvent e) {
        if ("disable".equals(e.getActionCommand())) {
            b2.setEnabled(false);
            b1.setEnabled(false);
            b3.setEnabled(true);
        } else {
            b2.setEnabled(true);
            b1.setEnabled(true);
            b3.setEnabled(false);
        }
    }
 
    /** 返回一个ImageIcon，如果路径无效则返回null。
     * @param path
     * @return  */
    protected static ImageIcon createImageIcon(String path) {
        java.net.URL imgURL = ButtonHtml.class.getResource(path);
        if (imgURL != null) {
            return new ImageIcon(imgURL);
        } else {
            System.err.println("找不到文件: " + path);
            return null;
        }
    }
 
}
目录

JavaFX: 互操作性
