Общие свойства
Я использую этот код, чтобы получить представление о некоторых вещах, известных классам Java, которые представляют для меня особый интерес.
import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.util.*;
import java.security.*;
/** A small GUId app. that shows many system and environment properties.
Designed to be compatible with Java 1.4+ (hence many requirements like
no foreach, no generics, no StringBuilder..).
@author Andrew Thompson
@version 2008-06-29
*/
class SystemProperties {
static String sentence = "The quick brown fox jumped over the lazy dog.";
static String sep = System.getProperty("line.separator");
static String fontText =
sentence +
sep +
sentence.toUpperCase() +
sep +
"0123456789 !@#$%^&*()_+ []\\;',./ {}|:\"<>?";
static String[] convertObjectToSortedStringArray(Object[] unsorted) {
String[] sorted = new String[unsorted.length];
for (int ii = 0; ii < sorted.length; ii++) {
sorted[ii] = (String) unsorted[ii];
}
Arrays.sort(sorted);
return sorted;
}
static String dataPairToTableRow(String property, Object value) {
String val = valueToString(property, value);
return "<tr>" +
"<th>" +
"<code>" +
property +
"</code>" +
"</th>" +
"<td>" +
val +
"</td>" +
"</tr>";
}
static String valueToString(String property, Object value) {
if (value instanceof Color) {
Color color = (Color) value;
String converted =
"<div style='width: 100%; height: 100%; " +
"background-color: #" +
Integer.toHexString(color.getRed()) +
Integer.toHexString(color.getGreen()) +
Integer.toHexString(color.getBlue()) +
";'>" +
value.toString() +
"</div>";
return converted;
} else if (property.toLowerCase().endsWith("path") ||
property.toLowerCase().endsWith("dirs")) {
return delimitedToHtmlList(
(String) value,
System.getProperty("path.separator"));
} else {
return value.toString();
}
}
static String delimitedToHtmlList(String values, String delimiter) {
String[] parts = values.split(delimiter);
StringBuffer sb = new StringBuffer();
sb.append("<ol>");
for (int ii = 0; ii < parts.length; ii++) {
sb.append("<li>");
sb.append(parts[ii]);
sb.append("</li>");
}
return sb.toString();
}
static Component getExampleOfFont(String fontFamily) {
Font font = new Font(fontFamily, Font.PLAIN, 24);
JTextArea ta = new JTextArea();
ta.setFont(font);
ta.setText(fontText);
ta.setEditable(false);
// don't allow these to get focus, as it
// interferes with desired scroll behavior
ta.setFocusable(false);
return ta;
}
static public JScrollPane getOutputWidgetForContent(String content) {
JEditorPane op = new JEditorPane();
op.setContentType("text/html");
op.setEditable(false);
op.setText(content);
return new JScrollPane(op);
}
public static void main(String[] args) {
JTabbedPane tabPane = new JTabbedPane();
StringBuffer sb;
String header = "<html><body><table border=1 width=100%>";
sb = new StringBuffer(header);
Properties prop = System.getProperties();
String[] propStrings = convertObjectToSortedStringArray(
prop.stringPropertyNames().toArray());
for (int ii = 0; ii < propStrings.length; ii++) {
sb.append(
dataPairToTableRow(
propStrings[ii],
System.getProperty(propStrings[ii])));
}
tabPane.addTab(
"System",
getOutputWidgetForContent(sb.toString()));
sb = new StringBuffer(header);
Map environment = System.getenv();
String[] envStrings = convertObjectToSortedStringArray(
environment.keySet().toArray());
for (int ii = 0; ii < envStrings.length; ii++) {
sb.append(
dataPairToTableRow(
envStrings[ii],
environment.get(envStrings[ii])));
}
tabPane.addTab(
"Environment",
getOutputWidgetForContent(sb.toString()));
sb = new StringBuffer(header);
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gs = ge.getScreenDevices();
for (int j = 0; j < gs.length; j++) {
GraphicsDevice gd = gs[j];
sb.append(
dataPairToTableRow(
"Device " + j,
gd.toString() +
" " +
gd.getIDstring()));
GraphicsConfiguration[] gc =
gd.getConfigurations();
for (int i = 0; i < gc.length; i++) {
sb.append(
dataPairToTableRow(
"Config " +
i,
(int) gc[i].getBounds().getWidth() +
"x" +
(int) gc[i].getBounds().getHeight() +
" " +
gc[i].getColorModel() +
", " +
" Accelerated: " +
gc[i].getImageCapabilities().isAccelerated() +
" True Volatile: " +
gc[i].getImageCapabilities().isTrueVolatile()));
}
}
tabPane.addTab(
"Graphics Environment",
getOutputWidgetForContent(sb.toString()));
String[] fonts = ge.getAvailableFontFamilyNames();
JPanel fontTable = new JPanel(new BorderLayout(3, 1));
// to enable key based scrolling in the font panel
fontTable.setFocusable(true);
JPanel fontNameCol = new JPanel(new GridLayout(0, 1, 2, 2));
JPanel fontExampleCol = new JPanel(new GridLayout(0, 1, 2, 2));
fontTable.add(fontNameCol, BorderLayout.WEST);
fontTable.add(fontExampleCol, BorderLayout.CENTER);
for (int ii = 0; ii < fonts.length; ii++) {
fontNameCol.add(new JLabel(fonts[ii]));
fontExampleCol.add(getExampleOfFont(fonts[ii]));
}
tabPane.add("Fonts", new JScrollPane(fontTable));
sb = new StringBuffer(header);
sb.append("<thead>");
sb.append("<tr>");
sb.append("<th>");
sb.append("Code");
sb.append("</th>");
sb.append("<th>");
sb.append("Language");
sb.append("</th>");
sb.append("<th>");
sb.append("Country");
sb.append("</th>");
sb.append("<th>");
sb.append("Variant");
sb.append("</th>");
sb.append("</tr>");
sb.append("</thead>");
Locale[] locales = Locale.getAvailableLocales();
SortableLocale[] sortableLocale = new SortableLocale[locales.length];
for (int ii = 0; ii < locales.length; ii++) {
sortableLocale[ii] = new SortableLocale(locales[ii]);
}
Arrays.sort(sortableLocale);
for (int ii = 0; ii < locales.length; ii++) {
String prefix = "";
String suffix = "";
Locale locale = sortableLocale[ii].getLocale();
if (locale.equals(Locale.getDefault())) {
prefix = "<b>";
suffix = "</b>";
}
sb.append(dataPairToTableRow(
prefix +
locale.toString() +
suffix,
prefix +
locale.getDisplayLanguage() +
suffix +
"</td><td>" +
prefix +
locale.getDisplayCountry() +
suffix +
"</td><td>" +
prefix +
locale.getDisplayVariant() +
suffix));
}
tabPane.add("Locales",
getOutputWidgetForContent(sb.toString()));
Locale.getDefault();
int border = 5;
JPanel p = new JPanel(new BorderLayout());
p.setBorder(new EmptyBorder(border, border, border, border));
p.add(tabPane, BorderLayout.CENTER);
p.setPreferredSize(new Dimension(400, 400));
JFrame f = new JFrame("Properties");
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.getContentPane().add(p, BorderLayout.CENTER);
f.pack();
f.setMinimumSize(f.getPreferredSize());
f.setSize(600, 500);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
class SortableLocale implements Comparable {
Locale locale;
SortableLocale(Locale locale) {
this.locale = locale;
}
public String toString() {
return locale.toString();
}
public Locale getLocale() {
return locale;
}
public int compareTo(Object object2) {
SortableLocale locale2 = (SortableLocale) object2;
//Locale locale2 = (Locale)object2;
return locale.toString().compareTo(
locale2.toString());
}
}
Медиа
Свойства, относящиеся к синтезированному и сэмплированному звуку и изображениям.
/*
<applet
code='MediaTypes'
width='900'
height='600'>
<param name='show' value='Sound|Sampled|Mixers|Primary Sound Capture Driver'>
</applet>
*/
import javax.imageio.ImageIO;
import javax.sound.sampled.*;
import javax.sound.midi.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.tree.*;
import javax.swing.event.*;
import javax.swing.text.Position;
public class MediaTypes extends JApplet {
JTable table;
boolean sortable = false;
JTree tree;
@Override
public void init() {
Runnable r = () -> {
MediaTypes mediaTypes = new MediaTypes();
String show = "";
if (getParameter("show")!=null) {
show = getParameter("show");
}
JPanel p = new JPanel();
mediaTypes.createGui(p, show);
add(p);
validate();
};
SwingUtilities.invokeLater(r);
}
public static void main(String[] args) {
Runnable r = () -> {
MediaTypes mediaTypes = new MediaTypes();
JPanel p = new JPanel();
mediaTypes.createGui(p);
JOptionPane.showMessageDialog(null,p);
};
SwingUtilities.invokeLater(r);
}
public Object[][] mergeArrays(String name1, Object[] data1, String name2, Object[] data2) {
Object[][] data = new Object[data1.length+data2.length][2];
for (int ii=0; ii<data1.length; ii++) {
data[ii][0] = name1;
data[ii][1] = data1[ii];
}
int offset = data1.length;
for (int ii=offset; ii<data.length; ii++) {
data[ii][0] = name2;
data[ii][1] = data2[ii-offset];
}
return data;
}
public void createGui(JPanel panel) {
createGui(panel, "");
}
public String getShortLineName(String name) {
String[] lineTypes = {
"Clip",
"SourceDataLine",
"TargetDataLine",
"Speaker",
"Microphone",
"Master Volume",
"Line In"
};
for (String shortName : lineTypes) {
if ( name.toLowerCase().replaceAll("_", " ").contains(shortName.toLowerCase() )) {
return shortName;
}
}
return name;
}
public void createGui(JPanel panel, String path) {
//DefaultMutableTreeNode selected = null;
panel.setLayout( new BorderLayout(5,5) );
final JLabel output = new JLabel("Select a tree leaf to see the details.");
panel.add(output, BorderLayout.SOUTH);
table = new JTable();
try {
table.setAutoCreateRowSorter(true);
sortable = true;
} catch (Throwable ignore) {
// 1.6+ functionality - not vital
}
JScrollPane tableScroll = new JScrollPane(table);
Dimension d = tableScroll.getPreferredSize();
d = new Dimension(450,d.height);
tableScroll.setPreferredSize(d);
panel.add( tableScroll, BorderLayout.CENTER );
DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Media");
DefaultTreeModel treeModel = new DefaultTreeModel(rootNode);
DefaultMutableTreeNode imageNode = new DefaultMutableTreeNode("Image");
rootNode.add(imageNode);
Object[][] data;
int offset;
String[] columnNames;
data = mergeArrays(
"Reader",
ImageIO.getReaderFileSuffixes(),
"Writer",
ImageIO.getWriterFileSuffixes() );
columnNames = new String[]{"Input/Output", "Image File Suffixes"};
MediaData md = new MediaData( "Suffixes", columnNames, data);
imageNode.add(new DefaultMutableTreeNode(md));
data = mergeArrays(
"Reader",
ImageIO.getReaderMIMETypes(),
"Writer",
ImageIO.getWriterMIMETypes() );
columnNames = new String[]{"Input/Output", "Image MIME Types"};
md = new MediaData( "MIME", columnNames, data);
imageNode.add(new DefaultMutableTreeNode(md));
DefaultMutableTreeNode soundNode = new DefaultMutableTreeNode("Sound");
rootNode.add(soundNode);
DefaultMutableTreeNode soundSampledNode = new DefaultMutableTreeNode("Sampled");
soundNode.add(soundSampledNode);
md = new MediaData("Suffixes", "Sound File Suffixes", AudioSystem.getAudioFileTypes());
soundSampledNode.add(new DefaultMutableTreeNode(md));
Mixer.Info[] mixerInfo = AudioSystem.getMixerInfo();
String[][] mixerData = new String[mixerInfo.length][4];
for (int ii=0; ii<mixerData.length; ii++) {
mixerData[ii][0] = mixerInfo[ii].getName();
mixerData[ii][1] = mixerInfo[ii].getVendor();
mixerData[ii][2] = mixerInfo[ii].getVersion();
mixerData[ii][3] = mixerInfo[ii].getDescription();
}
columnNames = new String[]{"Name", "Vendor", "Version", "Description"};
md = new MediaData("Mixers", columnNames, mixerData);
DefaultMutableTreeNode soundSampledMixersNode = new DefaultMutableTreeNode(md);
soundSampledNode.add(soundSampledMixersNode);
for (Mixer.Info mixerInfo1 : mixerInfo) {
Mixer mixer = AudioSystem.getMixer(mixerInfo1);
data = mergeArrays(
"Source",
mixer.getSourceLineInfo(),
"Target",
mixer.getTargetLineInfo() );
columnNames = new String[]{ "Input/Output", "Line Info" };
md = new MediaData(mixerInfo1.getName(), columnNames, data);
DefaultMutableTreeNode soundSampledMixerNode = new DefaultMutableTreeNode(md);
soundSampledMixersNode.add( soundSampledMixerNode );
Line.Info[] source = mixer.getSourceLineInfo();
Line.Info[] target = mixer.getTargetLineInfo();
Line[] all = new Line[source.length + target.length];
try {
for (int jj=0; jj<source.length; jj++) {
all[jj] = AudioSystem.getLine(source[jj]);
}
for (int jj=source.length; jj<all.length; jj++) {
all[jj] = AudioSystem.getLine(target[jj-source.length]);
}
columnNames = new String[]{"Attribute", "Value"};
for (Line line : all) {
Control[] controls = line.getControls();
if (line instanceof DataLine) {
DataLine dataLine = (DataLine)line;
AudioFormat audioFormat = dataLine.getFormat();
data = new Object[7+controls.length][2];
data[0][0] = "Channels";
data[0][1] = audioFormat.getChannels();
data[1][0] = "Encoding";
data[1][1] = audioFormat.getEncoding();
data[2][0] = "Frame Rate";
data[2][1] = audioFormat.getFrameRate();
data[3][0] = "Sample Rate";
data[3][1] = audioFormat.getSampleRate();
data[4][0] = "Sample Size (bits)";
data[4][1] = audioFormat.getSampleSizeInBits();
data[5][0] = "Big Endian";
data[5][1] = audioFormat.isBigEndian();
data[6][0] = "Level";
data[6][1] = dataLine.getLevel();
} else if (line instanceof Port) {
Port port = (Port)line;
Port.Info portInfo = (Port.Info)port.getLineInfo();
data = new Object[2+controls.length][2];
data[0][0] = "Name";
data[0][1] = portInfo.getName();
data[1][0] = "Source";
data[1][1] = portInfo.isSource();
} else {
System.out.println( "?? " + line );
}
int start = data.length-controls.length;
for (int kk=start; kk<data.length; kk++) {
data[kk][0] = "Control";
int index = kk-start;
data[kk][1] = controls[index];
}
md = new MediaData(getShortLineName(line.getLineInfo().toString()), columnNames, data);
soundSampledMixerNode.add(new DefaultMutableTreeNode(md));
}
} catch(Exception e) {
e.printStackTrace();
}
}
int[] midiTypes = MidiSystem.getMidiFileTypes();
data = new Object[midiTypes.length][2];
for (int ii=0; ii<midiTypes.length; ii++) {
data[ii][0] = midiTypes[ii];
String description = "Unknown";
switch (midiTypes[ii]) {
case 0:
description = "Single Track";
break;
case 1:
description = "Multi Track";
break;
case 2:
description = "Multi Song";
}
data[ii][1] = description;
}
columnNames = new String[]{"Type", "Description"};
md = new MediaData("MIDI", columnNames, data);
DefaultMutableTreeNode soundMIDINode = new DefaultMutableTreeNode(md);
soundNode.add(soundMIDINode);
columnNames = new String[]{
"Attribute",
"Value"};
MidiDevice.Info[] midiDeviceInfo = MidiSystem.getMidiDeviceInfo() ;
for (MidiDevice.Info midiDeviceInfo1 : midiDeviceInfo) {
data = new Object[6][2];
data[0][0] = "Name";
data[0][1] = midiDeviceInfo1.getName();
data[1][0] = "Vendor";
data[1][1] = midiDeviceInfo1.getVendor();
data[2][0] = "Version";
String version = midiDeviceInfo1.getVersion();
data[2][1] = version.replaceAll("Version ", "");
data[3][0] = "Description";
data[3][1] = midiDeviceInfo1.getDescription();
data[4][0] = "Maximum Transmitters";
data[5][0] = "Maximum Receivers";
try {
MidiDevice midiDevice = MidiSystem.getMidiDevice(midiDeviceInfo1);
Object valueTransmitter;
if (midiDevice.getMaxTransmitters()==AudioSystem.NOT_SPECIFIED) {
valueTransmitter = "Not specified";
} else {
valueTransmitter = midiDevice.getMaxTransmitters();
}
Object valueReceiver;
if (midiDevice.getMaxReceivers()==AudioSystem.NOT_SPECIFIED) {
valueReceiver = "Not specified";
} else {
valueReceiver = midiDevice.getMaxReceivers();
}
data[4][1] = valueTransmitter;
data[5][1] = valueReceiver;
}catch(MidiUnavailableException mue) {
data[4][1] = "Unknown";
data[5][1] = "Unknown";
}
md = new MediaData(midiDeviceInfo1.getName(), columnNames, data);
soundMIDINode.add( new DefaultMutableTreeNode(md) );
}
tree = new JTree(treeModel);
tree.setRootVisible(false);
tree.getSelectionModel().setSelectionMode
(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.addTreeSelectionListener((TreeSelectionEvent tse) -> {
if (sortable) {
output.setText("Click table column headers to sort.");
}
DefaultMutableTreeNode node = (DefaultMutableTreeNode)
tree.getLastSelectedPathComponent();
if (node == null) return;
Object nodeInfo = node.getUserObject();
if (nodeInfo instanceof MediaData) {
MediaData mediaData = (MediaData)nodeInfo;
table.setModel( new DefaultTableModel(
mediaData.getData(),
mediaData.getColumnNames()) );
}
});
for (int ii=0; ii<tree.getRowCount(); ii++) {
tree.expandRow(ii);
}
String[] paths = path.split("\\|");
int row = 0;
TreePath treePath = null;
for (String prefix : paths) {
treePath = tree.getNextMatch( prefix, row, Position.Bias.Forward );
row = tree.getRowForPath(treePath);
}
panel.add(new JScrollPane(tree),BorderLayout.WEST);
tree.setSelectionPath(treePath);
tree.scrollRowToVisible(row);
}
}
class MediaData {
String name;
String[] columnNames;
Object[][] data;
MediaData(String name, String columnName, Object[] data) {
this.name = name;
columnNames = new String[1];
columnNames[0] = columnName;
this.data = new Object[data.length][1];
for (int ii=0; ii<data.length; ii++) {
this.data[ii][0] = data[ii];
}
}
MediaData(String name, String[] columnNames, Object[][] data) {
this.name = name;
this.columnNames = columnNames;
this.data = data;
}
@Override
public String toString() {
return name;
}
public String[] getColumnNames() {
return columnNames;
}
public Object[][] getData() {
return data;
}
}
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