在回答有关这些部分的另一个问题时，我开始对可能从系统上可用字体显示的 Unicode 字符中获得的字形感到好奇。
当然，一台典型的机器上有 65,536 个 Unicode 字符和超过 250 种字体！让人不知道从哪里开始。一个应用程序会很棒。这允许我们浏览 Unicode 代码点的表格，如列表中选择的任何字体所示。最好还有：
做这样的应用程序。存在？
它可能看起来，嗯..像这样！
当然。试一试。
import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import javax.swing.event.*;
import javax.swing.table.*;
import javax.swing.plaf.basic.BasicComboBoxEditor;
import javax.swing.text.Document;
import java.util.*;
import java.util.logging.*;
public class UnicodeExplorer {
public static final int codePointColumnWidth = 16;
public static final int numberUnicodes = 256 * 256;
private final ArrayList<Font> fontList = new ArrayList<Font>();
private final SpinnerNumberModel startPage = new SpinnerNumberModel(
0, 0, numberUnicodes, 1);
private Font[] fontArray;
private JList<Font> fonts = new JList<Font>(fontArray);
private final FontTableCellRenderer fontTableCellRenderer =
new FontTableCellRenderer();
private final JTable codePointTable = new JTable(new CodePointTableModel(
numberUnicodes / codePointColumnWidth, codePointColumnWidth));
public static void main(String[] args) {
Runnable r = new Runnable() {
@Override
public void run() {
// the GUI as seen by the user (without frame)
JPanel gui = new JPanel(new BorderLayout());
gui.setBorder(new EmptyBorder(2, 3, 2, 3));
UnicodeExplorer ue = new UnicodeExplorer();
ue.initGui(gui);
JFrame f = new JFrame("UGlys - Unicode Glyphs");
f.add(gui);
// Ensures JVM closes after frame(s) closed and
// all non-daemon threads are finished
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
// See http://stackoverflow.com/a/7143398/418556 for demo.
f.setLocationByPlatform(true);
ue.setCharacterSpinner(new Integer(65));
f.pack();
f.setMinimumSize(f.getSize());
// should be done last, to avoid flickering, moving,
// resizing artifacts.
f.setVisible(true);
}
};
// Swing GUIs should be created and updated on the EDT
// http://docs.oracle.com/javase/tutorial/uiswing/concurrency
SwingUtilities.invokeLater(r);
}
public void handleCodePointTableSelection(ListSelectionEvent e) {
if (!e.getValueIsAdjusting()) {
int row = codePointTable.getSelectedRow();
int col = codePointTable.getSelectedColumn();
int codePoint = (row * codePointColumnWidth) + col;
setCodePointDetailView(codePoint);
}
}
JPanel characterPanel = null;
JList<Font> supportedFonts = new JList<Font>();
JLabel bigCharacter = new JLabel();
JLabel characterDetails = new JLabel();
public void setFontsForThisCodePoint(int codePoint) {
DefaultListModel<Font> dlm = new DefaultListModel<Font>();
for (Font font : fontArray) {
if (font.canDisplay(codePoint)) {
dlm.addElement(font);
}
}
supportedFonts.setModel(dlm);
supportedFonts.setVisibleRowCount(5);
}
public void setCodePointDetailView(int codePoint) {
String s = UnicodeUtil.getCodePointString(codePoint);
bigCharacter.setText(s);
StringBuilder sb = new StringBuilder("<html><body><table>");
sb.append(getTableRow("Character", s));
sb.append(getTableRow("Name", "" + Character.getName(codePoint)));
sb.append(getTableRow("Code Point", "" + codePoint));
sb.append(getTableRow(
"Is Defined", "" + Character.isDefined(codePoint)));
sb.append(getTableRow(
"Is BMP", "" + Character.isBmpCodePoint(codePoint)));
sb.append(getTableRow(
"Is ISO Control", "" + Character.isISOControl(codePoint)));
sb.append(getTableRow(
"Is Mirrored", "" + Character.isMirrored(codePoint)));
sb.append(getTableRow(
"Is Digit", "" + Character.isDigit(codePoint)));
sb.append(getTableRow(
"Is Letter", "" + Character.isLetter(codePoint)));
sb.append(getTableRow(
"Is Alphabetic", "" + Character.isAlphabetic(codePoint)));
sb.append(getTableRow(
"Is Ideographic", "" + Character.isIdeographic(codePoint)));
sb.append(getTableRow(
"Is Space Character", "" + Character.isSpaceChar(codePoint)));
sb.append(getTableRow(
"Is White Space", "" + Character.isWhitespace(codePoint)));
sb.append(getTableRow(
"Is Lower Case", "" + Character.isLowerCase(codePoint)));
sb.append(getTableRow(
"Is Title Case", "" + Character.isTitleCase(codePoint)));
sb.append(getTableRow(
"Is Upper Case", "" + Character.isUpperCase(codePoint)));
sb.append("</table></body></html>");
characterDetails.setText(sb.toString());
setFontsForThisCodePoint(codePoint);
}
public String getTableRow(String key, String value) {
return "<tr><th>" + key + "</th><td>" + value + "</td></tr>";
}
public Component getCharacterPanel() {
if (characterPanel == null) {
characterPanel = new JPanel(new BorderLayout(5, 5));
JPanel characterAndFonts = new JPanel(new BorderLayout(3, 3));
characterAndFonts.add(bigCharacter, BorderLayout.PAGE_START);
characterAndFonts.add(
new JScrollPane(supportedFonts), BorderLayout.CENTER);
JSplitPane sp = new JSplitPane(
JSplitPane.HORIZONTAL_SPLIT,
characterAndFonts,
new JScrollPane(characterDetails));
characterPanel.add(sp, BorderLayout.CENTER);
supportedFonts.setCellRenderer(new FontCellRenderer());
ListSelectionListener lsl = new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
selectFont(supportedFonts.getSelectedValue());
}
};
supportedFonts.addListSelectionListener(lsl);
}
return characterPanel;
}
@SuppressWarnings("unchecked")
public void initGui(Container c) {
if (fontList.size() != 0) {
return;
}
GraphicsEnvironment ge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fontNameArray = ge.getAvailableFontFamilyNames();
codePointTable.setDefaultRenderer(Object.class, fontTableCellRenderer);
codePointTable.setRowSelectionAllowed(false);
codePointTable.setCellSelectionEnabled(true);
ListSelectionModel lsm = codePointTable.getSelectionModel();
lsm.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ListSelectionListener codePointListSelectionListener =
new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
handleCodePointTableSelection(e);
}
};
codePointTable.getSelectionModel().
addListSelectionListener(codePointListSelectionListener);
TableColumnModelListener tcml = new TableColumnModelListener() {
@Override
public void columnAdded(TableColumnModelEvent e) {
}
@Override
public void columnRemoved(TableColumnModelEvent e) {
}
@Override
public void columnMoved(TableColumnModelEvent e) {
}
@Override
public void columnMarginChanged(ChangeEvent e) {
}
@Override
public void columnSelectionChanged(ListSelectionEvent e) {
handleCodePointTableSelection(e);
}
};
codePointTable.getColumnModel().addColumnModelListener(tcml);
Logger.getLogger(
UnicodeExplorer.class.getCanonicalName()).log(
Level.INFO, "fontNameArray: " + fontNameArray.length);
fontArray = new Font[fontNameArray.length];
String[] logicalFonts = {
Font.DIALOG, Font.DIALOG_INPUT,
Font.MONOSPACED,
Font.SANS_SERIF, Font.SERIF
};
for (int ii = 0; ii < logicalFonts.length; ii++) {
Font f = new Font(logicalFonts[ii], Font.PLAIN, 1);
fontArray[ii] = f;
fontList.add(f);
}
int count = 0;
for (int ii = 0; ii < fontNameArray.length; ii++) {
Font f = new Font(fontNameArray[ii], Font.PLAIN, 1);
if (!fontList.contains(f)) {
fontArray[logicalFonts.length + count++] = f;
fontList.add(f);
}
}
Logger.getLogger(
UnicodeExplorer.class.getCanonicalName()).log(
Level.INFO, "fontArray: " + fontArray.length);
fonts = new JList<Font>(fontArray);
fonts.setCellRenderer(new FontCellRenderer());
fonts.setVisibleRowCount(8);
Dimension d = fonts.getPreferredSize();
Dimension d1 = new Dimension(
(int) (d.getWidth() / 3), (int) d.getHeight());
fonts.setPreferredSize(d1);
ListSelectionListener lsl = new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
int index = fonts.getSelectedIndex();
if (index < 0) {
index = 0;
}
Font f = fontArray[index].deriveFont(32f);
fontTableCellRenderer.setDisplayFont(f);
codePointTable.setRowHeight(f.getSize());
bigCharacter.setFont(f.deriveFont(128f));
}
};
fonts.addListSelectionListener(lsl);
JScrollPane fontScroll = new JScrollPane(fonts);
JPanel tools = new JPanel(new FlowLayout(FlowLayout.CENTER));
JSpinner page = new JSpinner(startPage);
tools.add(page);
ChangeListener cl = new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
int index = startPage.getNumber().intValue();
selectCodePoint(index);
}
};
page.addChangeListener(cl);
JPanel codePointTableComponent = new JPanel(new BorderLayout(3, 3));
codePointTableComponent.add(tools, BorderLayout.PAGE_START);
JScrollPane codePointTableScroll = new JScrollPane(codePointTable);
ArrayList<Integer> namedCodePoints = new ArrayList<Integer>();
final FilteredCodePointListModel namedCodePointListModel =
new FilteredCodePointListModel();
ListCellRenderer namedCodePointListeCellRenderer =
new CodePointListCellRenderer();
String s;
for (int ii = 0; ii < numberUnicodes; ii++) {
s = Character.getName(ii);
if (s != null) {
s = s.trim().toLowerCase();
if (!s.startsWith("null")
&& !s.contains("private")
&& !s.contains("cjk")
&& !s.contains("surrogate")) {
namedCodePoints.add(ii);
namedCodePointListModel.addElement(new Integer(ii));
}
}
}
final JList<Integer> namedCodePointList =
new JList<Integer>(namedCodePointListModel);
ListSelectionListener namedCodePointListSelectionListener =
new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
if (!e.getValueIsAdjusting()) {
Integer i = namedCodePointList.getSelectedValue();
startPage.setValue(i);
}
}
};
namedCodePointList.addListSelectionListener(
namedCodePointListSelectionListener);
namedCodePointList.setCellRenderer(namedCodePointListeCellRenderer);
namedCodePointList.setVisibleRowCount(8);
namedCodePointListModel.setFilter("");
HashMap<String, Integer> namePartMap = new HashMap<String, Integer>();
for (int ii = 0; ii < namedCodePoints.size(); ii++) {
String name = Character.getName(namedCodePoints.get(ii));
String[] parts = name.split(" ");
for (String part : parts) {
if (namePartMap.containsKey(part)) {
Integer num = namePartMap.get(part);
namePartMap.put(part, num.intValue() + 1);
} else {
namePartMap.put(part, 1);
}
}
}
int namePartMapSize = namePartMap.size();
class PartNumber implements Comparable {
public String part;
public int number;
PartNumber(String part, int number) {
this.part = part;
this.number = number;
}
@Override
public int compareTo(Object o) {
PartNumber partNumber2 = (PartNumber) o;
if (number == partNumber2.number) {
return part.compareTo(partNumber2.part);
} else {
return number - partNumber2.number;
}
}
@Override
public String toString() {
return "Part: " + part + " \tnumber: " + number;
}
}
ArrayList<PartNumber> partNumbers = new ArrayList<PartNumber>();
Set keySet = namePartMap.keySet();
Iterator it = keySet.iterator();
while (it.hasNext()) {
String key = (String) it.next();
int number = (Integer) namePartMap.get(key);
if (key.length() > 4 && number > 7) {
partNumbers.add(new PartNumber(key, number));
}
}
Collections.sort(partNumbers);
partNumbers.add(new PartNumber("", 0));
String[] names = new String[partNumbers.size()];
for (int jj = 0; jj < names.length; jj++) {
names[jj] = partNumbers.get(jj).part;
}
Collections.sort(Arrays.asList(names));
JComboBox<String> codePointNameFilterCombo =
new JComboBox<String>(names);
codePointNameFilterCombo.setEditable(true);
ComboBoxEditor cbe = new BasicComboBoxEditor();
final JTextField tf = (JTextField) cbe.getEditorComponent();
Document doc = tf.getDocument();
DocumentListener dl = new DocumentListener() {
@Override
public void insertUpdate(DocumentEvent e) {
namedCodePointListModel.setFilter(tf.getText());
refreshList();
}
@Override
public void removeUpdate(DocumentEvent e) {
namedCodePointListModel.setFilter(tf.getText());
refreshList();
}
@Override
public void changedUpdate(DocumentEvent e) {
namedCodePointListModel.setFilter(tf.getText());
refreshList();
}
private void refreshList() {
namedCodePointList.repaint();
namedCodePointList.scrollRectToVisible(
namedCodePointList.getCellBounds(0, 0));
}
};
doc.addDocumentListener(dl);
codePointNameFilterCombo.setEditor(cbe);
codePointNameFilterCombo.setEditor(cbe);
namedCodePointListModel.setFilter("");
//codePointNameFilterCombo
JPanel namedCodePointPanel = new JPanel(new BorderLayout(3, 3));
namedCodePointPanel.add(
codePointNameFilterCombo, BorderLayout.PAGE_START);
Dimension sizeOfNamedCodePointList = namedCodePointList.getPreferredSize();
Dimension thinnerSizeOfNamedCodePointList = new Dimension(
sizeOfNamedCodePointList.width / 4, sizeOfNamedCodePointList.height);
namedCodePointList.setPreferredSize(thinnerSizeOfNamedCodePointList);
namedCodePointPanel.add(
new JScrollPane(namedCodePointList), BorderLayout.CENTER);
JSplitPane codePointTableNameSplit = new JSplitPane(
JSplitPane.HORIZONTAL_SPLIT,
codePointTableScroll,
namedCodePointPanel);
codePointTableNameSplit.setResizeWeight(1d);
codePointTableComponent.add(codePointTableNameSplit, BorderLayout.CENTER);
JSplitPane split = new JSplitPane(
JSplitPane.HORIZONTAL_SPLIT,
fontScroll, codePointTableComponent);
selectFont(new Font(Font.SANS_SERIF, Font.PLAIN, 1));
JSplitPane splitTopBottom = new JSplitPane(
JSplitPane.VERTICAL_SPLIT, split, getCharacterPanel());
c.add(splitTopBottom, BorderLayout.CENTER);
}
public void setCharacterSpinner(Integer i) {
// page.setValue(i);
startPage.setValue(new Integer(65));
}
public void selectCodePoint(int codePoint) {
Logger.getLogger(UnicodeExplorer.class.getName()).log(
Level.INFO, "code point " + codePoint);
ListSelectionModel lsm = codePointTable.getSelectionModel();
int row = codePoint / codePointColumnWidth;
lsm.setSelectionInterval(row, row);
int col = codePoint % codePointColumnWidth;
codePointTable.setColumnSelectionInterval(col, col);
codePointTable.scrollRectToVisible(
codePointTable.getCellRect(row, col, false));
}
public void selectFont(Font font) {
int indexDefault = fontList.indexOf(font);
fonts.setSelectedIndex(indexDefault);
Rectangle rect = fonts.getCellBounds(indexDefault, indexDefault);
if (rect != null) {
fonts.scrollRectToVisible(rect.getBounds());
}
}
}
class FontCellRenderer extends DefaultListCellRenderer {
float fontSize = 24;
JLabel label;
public Component getListCellRendererComponent(
JList list,
Object value,
int index,
boolean isSelected,
boolean cellHasFocus) {
Font fontOrig = (Font) value;
Font temp = fontOrig;
String pre = "";
String suf = "";
int displayIndex = temp.canDisplayUpTo(temp.getFamily());
if (displayIndex > -1) {
temp = new Font(Font.MONOSPACED, Font.PLAIN, temp.getSize());
pre = "(";
suf = ")";
}
label = (JLabel) super.getListCellRendererComponent(
list,
pre + fontOrig.getFamily() + suf,
index, isSelected, cellHasFocus);
label.setToolTipText(fontOrig.toString());
label.setFont(temp.deriveFont(fontSize));
return label;
}
}
class FontTableCellRenderer extends DefaultTableCellRenderer {
private Font displayFont;
@Override
public Component getTableCellRendererComponent(
JTable table, Object value,
boolean isSelected, boolean hasFocus,
int row, int column) {
Component c = super.getTableCellRendererComponent(
table, value, isSelected, hasFocus, row, column);
if (c instanceof JLabel) {
JLabel l = (JLabel) c;
int codePoint = ((Integer) value).intValue();
boolean isDefined = Character.isDefined(codePoint);
boolean canDisplay = displayFont.canDisplay(codePoint);
String s = UnicodeUtil.getCodePointString(codePoint);
l.setText(s);
if (displayFont != null) {
l.setFont(displayFont.deriveFont(
(float) (displayFont.getSize() * .8)));
String tip = "<html><body style='font-size: 64px; "
+ "font-family: "
+ displayFont.getFamily()
+ ";'>&#" + codePoint
+ " " + Character.getName(codePoint);
l.setToolTipText(tip);
l.setForeground(Color.BLACK);
if (!canDisplay) {
l.setForeground(Color.RED);
}
if (!isDefined) {
l.setForeground(Color.BLUE);
}
}
} else {
Logger.getLogger(
UnicodeExplorer.class.getName(),
"We are not getting a JLabel as expected!");
}
return c;
}
public void setDisplayFont(Font font) {
displayFont = font;
}
}
class UnicodeUtil {
public static String getCodePointString(int codePoint) {
return new String(Character.toChars(codePoint));
}
}
class CodePointTableModel extends DefaultTableModel {
public static final String[] COLUMN_NAMES = {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"A", "B", "C", "D", "E", "F"
};
public CodePointTableModel(int rows, int cols) {
super(rows, cols);
}
@Override
public String getColumnName(int column) {
return COLUMN_NAMES[column];
}
@Override
public Object getValueAt(int row, int col) {
return (row * getColumnCount()) + col;
}
}
class CodePointListCellRenderer extends DefaultListCellRenderer {
@Override
public Component getListCellRendererComponent(
JList list,
Object value,
int index,
boolean isSelected,
boolean cellHasFocus) {
JLabel l = (JLabel) super.getListCellRendererComponent(
list, value, index, isSelected, cellHasFocus);
Integer i = (Integer) value;
String s = new String(
Character.toChars(i))
+ " - " + Character.getName(i.intValue());
l.setText(s);
return l;
}
}
class FilteredCodePointListModel extends DefaultListModel {
public String filter = "";
public Object[] filteredElements = new Object[0];
public void setFilter(String filter) {
this.filter = filter;
filterList();
}
@SuppressWarnings("unchecked")
private void filterList() {
Object[] allElements = super.toArray();
if (filter.trim().length() == 0) {
// use entire list.
filteredElements = allElements;
} else {
// filter the list
ArrayList<Object> allList = new ArrayList<Object>();
String[] parts = filter.toUpperCase().trim().split(" ");
for (int ii = 0; ii < super.size(); ii++) {
Integer codePointInt = (Integer) super.elementAt(ii);
int codePointNumber = codePointInt.intValue();
String name = Character.getName(codePointNumber).toUpperCase();
boolean containsAll = true;
for (String part : parts) {
if (name.indexOf(part) < 0) {
containsAll = false;
}
}
if (containsAll) {
allList.add(codePointInt);
}
}
filteredElements = allList.toArray();
}
}
@Override
public int getSize() {
return filteredElements.length;
}
@Override
public Object getElementAt(int index) {
return filteredElements[index];
}
}