JAVA做的写字板 可以实现windows里面的写字板相似的功能

package view.frame; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.GraphicsEnvironment; import java.awt.Insets; import java.awt.Rectangle; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.io.Serializable; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JComponent; import javax.swing.JDialog; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextField; import javax.swing.KeyStroke; import javax.swing.ListSelectionModel; import javax.swing.SwingConstants; import javax.swing.border.TitledBorder; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; /** * <p>Title: OpenSwing</p> * <p>Description: JFontDialog</p> * 履历:<BR> * 2006/01/20 根据网友ranchgirl的建议修改了几个BUG<BR> * <p>Copyright: Copyright (c) 2004</p> * <p>Company: </p> * @author <a href="mailto:sunkingxie@hotmail.com">SunKing</a> * @version 1.0 */ public class JFontDialog extends JDialog implements ActionListener, ListSelectionListener, Serializable { private JPanel pCenter = new JPanel(); private JTextField txtName = new JTextField(); private JTextField txtStyle = new JTextField(); private JTextField txtSize = new JTextField(); private JScrollPane spName = new JScrollPane(); private JScrollPane spStyle = new JScrollPane(); private JScrollPane spSize = new JScrollPane(); private JPanel pPreview = new JPanel(); private TitledBorder titledBorder1; private JLabel lbName = new JLabel(); private JLabel lbStyle = new JLabel(); private JLabel lbSize = new JLabel(); private MainFrame frame; /** * 取得所有字体名 */ String fontNames[] = GraphicsEnvironment.getLocalGraphicsEnvironment(). getAvailableFontFamilyNames(); private JList listName = new JList(fontNames); String fontStyles[] = {"标准","粗体","斜体","粗斜体"}; private JList listStyle = new JList(fontStyles); String fontSizes[] = { "8", "9", "10", "11", "12", "14", "16", "18", "20", "22", "24", "26", "28", "36", "48", "72"}; private JList listSize = new JList(fontSizes); private JLabel lbPreview = new JLabel(); private JButton bttOK = new JButton(); private JButton bttCancel = new JButton() { public Insets getInsets() { return new Insets(0, 0, 0, 0); } }; boolean hasCancel = true; public static Font showDialog(MainFrame frame,String title, boolean modal, Font initFont) { JFontDialog dialog; dialog = new JFontDialog(frame,title, modal); if (initFont != null) { dialog.setFont(initFont); } Dimension d = Toolkit.getDefaultToolkit().getScreenSize(); dialog.setLocation( (d.width - dialog.getSize().width) / 2, (d.height - dialog.getSize().height) / 2); dialog.setVisible(true); return dialog.getFont(); } /** * 取得根窗口 * @param c Component * @return Window */ public JFontDialog(MainFrame frame,String title, boolean modal){ this.frame = frame; this.setTitle(title); this.setModalityType(this.DEFAULT_MODALITY_TYPE); jbInit(); } private void jbInit() { this.setSize(480, 310); titledBorder1 = new TitledBorder("预览"); pCenter.setLayout(null); txtName.setBackground(Color.white); txtName.setEditable(false); txtName.setBounds(new Rectangle(15, 22, 152, 21)); txtStyle.setBackground(Color.white); txtStyle.setEditable(false); txtStyle.setBounds(new Rectangle(174, 22, 123, 21)); txtSize.setBackground(Color.white); txtSize.setEditable(false); txtSize.setBounds(new Rectangle(304, 22, 63, 21)); spName.setBounds(new Rectangle(15, 47, 152, 220)); spStyle.setBounds(new Rectangle(174, 47, 123, 113)); spSize.setBounds(new Rectangle(304, 47, 63, 113)); pPreview.setBorder(titledBorder1); pPreview.setBounds(new Rectangle(174, 170, 193, 98)); pPreview.setLayout(null); lbName.setText("名称"); lbName.setBounds(new Rectangle(15, 4, 151, 17)); lbStyle.setText("样式"); lbStyle.setBounds(new Rectangle(174, 4, 123, 17)); lbSize.setText("大小"); lbSize.setBounds(new Rectangle(304, 4, 62, 17)); lbPreview.setBorder(BorderFactory.createLoweredBevelBorder()); lbPreview.setHorizontalAlignment(SwingConstants.CENTER); lbPreview.setText("AaBbCc"); lbPreview.setBounds(new Rectangle(10, 23, 171, 61)); bttOK.setBounds(new Rectangle(379, 21, 79, 22)); bttOK.setMnemonic('O'); bttOK.setText("确定"); bttCancel.setBounds(new Rectangle(379, 48, 79, 22)); bttCancel.setMnemonic('C'); bttCancel.setText("取消"); listName.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); listStyle.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); listSize.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); getContentPane().add(pCenter); pCenter.add(spName, null); pCenter.add(lbName, null); pCenter.add(spStyle, null); pCenter.add(txtName, null); pCenter.add(txtStyle, null); pCenter.add(lbStyle, null); pCenter.add(txtSize, null); pCenter.add(lbSize, null); pCenter.add(spSize, null); pCenter.add(pPreview, null); pPreview.add(lbPreview, null); pCenter.add(bttOK, null); pCenter.add(bttCancel, null); spSize.getViewport().add(listSize, null); spStyle.getViewport().add(listStyle, null); spName.getViewport().add(listName, null); bttOK.addActionListener(this); bttCancel.addActionListener(this); listName.addListSelectionListener(this); listSize.addListSelectionListener(this); listStyle.addListSelectionListener(this); setFont(lbPreview.getFont()); getRootPane().registerKeyboardAction(this, KeyStroke.getKeyStroke(KeyEvent. VK_ESCAPE, 0), JComponent.WHEN_IN_FOCUSED_WINDOW); } public void setFont(Font f) { if (f == null) throw new NullPointerException("mag1"); listName.setSelectedValue(f.getFamily(), true); listStyle.setSelectedIndex(f.getStyle()); listSize.setSelectedValue("" + f.getSize(), true); super.setFont(f); } public Font getFont() { if (hasCancel){ return null; } return lbPreview.getFont(); } public void valueChanged(ListSelectionEvent e) { JList obj = (JList)e.getSource(); if (obj == listName) { txtName.setText(listName.getSelectedValue().toString()); } else if (obj == listStyle) { txtStyle.setText(listStyle.getSelectedValue().toString()); } else if (obj == listSize) { txtSize.setText(listSize.getSelectedValue().toString()); } obj.scrollRectToVisible(obj.getCellBounds( obj.getSelectedIndex(), obj.getSelectedIndex())); try { Font f = new Font(txtName.getText(), listStyle.getSelectedIndex(), Integer.parseInt(txtSize.getText())); lbPreview.setFont(f); } catch (NumberFormatException ex) { } } public void actionPerformed(ActionEvent e) { Object ob