protected void preCache(List<Position> grid, Position centerPosition)
throws InterruptedException {
// Pre-cache the tiles that will be needed for the intersection calculations.
double n = 0;
final long start = System.currentTimeMillis();
for (Position gridPos : grid) // for each grid point.
{
final double progress = 100 * (n++ / grid.size());
terrain.cacheIntersectingTiles(centerPosition, gridPos);
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
progressBar.setValue((int) progress);
progressBar.setString(null);
}
});
}
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
progressBar.setValue(100);
}
});
long end = System.currentTimeMillis();
System.out.printf(
"Pre-caching time %d milliseconds, cache usage %f, tiles %d\n",
end - start, terrain.getCacheUsage(), terrain.getNumCacheEntries());
}
static {
if (gov.nasa.worldwind.Configuration.isMacOS()) {
System.setProperty("apple.laf.useScreenMenuBar", "true");
System.setProperty(
"com.apple.mrj.application.apple.menu.about.name", "World Wind Multi-Window Analysis");
System.setProperty("com.apple.mrj.application.growbox.intrudes", "false");
}
}
protected static class AppFrame extends ApplicationTemplate.AppFrame {
public AppFrame() {
super(true, true, true);
RenderableLayer layer = new RenderableLayer();
layer.setName("Video on terrain");
insertBeforePlacenames(this.getWwd(), layer);
this.layerPanel.update(
this.getWwd()); // makes the ApplicationTemplate layer list show the new layer
// Set up a SelectListener to drag the SurfaceImage.
this.getWwd().addSelectListener(new SurfaceImageDragger(this.getWwd()));
final SurfaceImage surfaceImage = new SurfaceImage(makeImage(), CORNERS);
surfaceImage.setOpacity(IMAGE_OPACITY);
layer.addRenderable(surfaceImage);
javax.swing.Timer timer =
new javax.swing.Timer(
50,
new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
Iterable<LatLon> corners = surfaceImage.getCorners();
surfaceImage.setImageSource(makeImage(), corners);
getWwd().redraw();
}
});
timer.start();
}
protected long counter;
protected long start = System.currentTimeMillis();
protected BufferedImage makeImage() {
BufferedImage image =
new BufferedImage(IMAGE_SIZE, IMAGE_SIZE, BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g = image.createGraphics();
g.setPaint(Color.WHITE);
g.fill3DRect(0, 0, IMAGE_SIZE, IMAGE_SIZE, false);
g.setPaint(Color.RED);
g.setFont(Font.decode("ARIAL-BOLD-50"));
g.drawString(Long.toString(++this.counter) + " frames", 10, IMAGE_SIZE / 4);
g.drawString(
Long.toString((System.currentTimeMillis() - start) / 1000) + " sec", 10, IMAGE_SIZE / 2);
g.drawString(
"Heap:" + Long.toString(Runtime.getRuntime().totalMemory()), 10, 3 * IMAGE_SIZE / 4);
g.dispose();
return image;
}
}
/**
* Initiates a retrieval of the model referenced by this placemark. Once the resource is retrieved
* and loaded, this calls <code>{@link #setColladaRoot(ColladaRoot)}</code> to specify this link's
* new network resource, and sends an <code>
* {@link gov.nasa.worldwind.avlist.AVKey#RETRIEVAL_STATE_SUCCESSFUL}</code> property change event
* to this link's property change listeners.
*
* <p>This does nothing if this <code>KMLNetworkLink</code> has no <code>KMLLink</code>.
*
* @param address the address of the resource to retrieve
*/
protected void retrieveModel(String address) throws IOException, XMLStreamException {
Object o = this.parent.getRoot().resolveReference(address);
if (o == null) return;
ColladaRoot root = ColladaRoot.createAndParse(o);
if (root == null) return;
this.setColladaRoot(root);
this.resourceRetrievalTime.set(System.currentTimeMillis());
this.parent.getRoot().requestRedraw();
}
protected void performIntersectionTests(final Position curPos) throws InterruptedException {
// Clear the results lists when the user selects a new location.
this.firstIntersectionPositions.clear();
this.sightLines.clear();
// Raise the selected location and the grid points a little above ground just to show we can.
final double height = 5; // meters
// Form the grid.
double gridRadius = GRID_RADIUS.degrees;
Sector sector =
Sector.fromDegrees(
curPos.getLatitude().degrees - gridRadius, curPos.getLatitude().degrees + gridRadius,
curPos.getLongitude().degrees - gridRadius,
curPos.getLongitude().degrees + gridRadius);
this.grid = buildGrid(sector, height, GRID_DIMENSION, GRID_DIMENSION);
this.numGridPoints = grid.size();
// Compute the position of the selected location (incorporate its height).
this.referencePosition = new Position(curPos.getLatitude(), curPos.getLongitude(), height);
this.referencePoint =
terrain.getSurfacePoint(curPos.getLatitude(), curPos.getLongitude(), height);
// // Pre-caching is unnecessary and is useful only when it occurs before the
// intersection
// // calculations. It will incur extra overhead otherwise. The normal intersection
// calculations
// // cause the same caching, making subsequent calculations on the same area
// faster.
// this.preCache(grid, this.referencePosition);
// On the EDT, show the grid.
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
progressBar.setValue(0);
progressBar.setString(null);
clearLayers();
showGrid(grid, referencePosition);
getWwd().redraw();
}
});
// Perform the intersection calculations.
this.startTime = System.currentTimeMillis();
for (Position gridPos : this.grid) // for each grid point.
{
//noinspection ConstantConditions
if (NUM_THREADS > 0) this.threadPool.execute(new Intersector(gridPos));
else performIntersection(gridPos);
}
}
@SuppressWarnings({"ResultOfMethodCallIgnored"})
protected static void markFileUsed(java.io.File file) {
if (file == null) return;
long currentTime = System.currentTimeMillis();
if (file.canWrite()) file.setLastModified(currentTime);
if (file.isDirectory()) return;
java.io.File parent = file.getParentFile();
if (parent != null && parent.canWrite()) parent.setLastModified(currentTime);
}
public static void main(String[] args) {
if (Configuration.isMacOS()) {
System.setProperty("com.apple.mrj.application.apple.menu.about.name", "Hello World Wind");
}
java.awt.EventQueue.invokeLater(
new Runnable() {
public void run() {
// Create an AppFrame and immediately make it visible. As per Swing convention, this
// is done within an invokeLater call so that it executes on an AWT thread.
new AppFrame().setVisible(true);
}
});
}
protected static String propertyToPath(String propName) {
if (propName == null || propName.length() == 0) return null;
String prop = System.getProperty(propName);
if (prop != null) return prop;
if (propName.equalsIgnoreCase("gov.nasa.worldwind.platform.alluser.store"))
return determineAllUserLocation();
if (propName.equalsIgnoreCase("gov.nasa.worldwind.platform.user.store"))
return determineSingleUserLocation();
return null;
}
/** Keeps the progress meter current. When calculations are complete, displays the results. */
protected synchronized void updateProgress() {
// Update the progress bar only once every 250 milliseconds to avoid stealing time from
// calculations.
if (this.sightLines.size() >= this.numGridPoints) endTime = System.currentTimeMillis();
else if (System.currentTimeMillis() < this.lastTime + 250) return;
this.lastTime = System.currentTimeMillis();
// On the EDT, update the progress bar and if calculations are complete, update the World
// Window.
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
int progress = (int) (100d * getSightlinesSize() / (double) numGridPoints);
progressBar.setValue(progress);
if (progress >= 100) {
setCursor(Cursor.getDefaultCursor());
progressBar.setString((endTime - startTime) + " ms");
showResults();
System.out.printf("Calculation time %d milliseconds\n", endTime - startTime);
}
}
});
}
protected static String determineAllUserLocation() {
if (gov.nasa.worldwind.Configuration.isMacOS()) {
return "/Library/Caches";
} else if (gov.nasa.worldwind.Configuration.isWindowsOS()) {
String path = System.getenv("ALLUSERSPROFILE");
if (path == null) {
Logging.logger().severe("generic.AllUsersWindowsProfileNotKnown");
return null;
}
return path + (Configuration.isWindows7OS() ? "" : "\\Application Data");
} else if (gov.nasa.worldwind.Configuration.isLinuxOS()
|| gov.nasa.worldwind.Configuration.isUnixOS()
|| gov.nasa.worldwind.Configuration.isSolarisOS()) {
return "/var/cache/";
} else {
Logging.logger().warning("generic.UnknownOperatingSystem");
return null;
}
}
protected BufferedImage makeImage() {
BufferedImage image =
new BufferedImage(IMAGE_SIZE, IMAGE_SIZE, BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g = image.createGraphics();
g.setPaint(Color.WHITE);
g.fill3DRect(0, 0, IMAGE_SIZE, IMAGE_SIZE, false);
g.setPaint(Color.RED);
g.setFont(Font.decode("ARIAL-BOLD-50"));
g.drawString(Long.toString(++this.counter) + " frames", 10, IMAGE_SIZE / 4);
g.drawString(
Long.toString((System.currentTimeMillis() - start) / 1000) + " sec", 10, IMAGE_SIZE / 2);
g.drawString(
"Heap:" + Long.toString(Runtime.getRuntime().totalMemory()), 10, 3 * IMAGE_SIZE / 4);
g.dispose();
return image;
}
public static class AppFrame extends ApplicationTemplate.AppFrame {
private static final Cursor WaitCursor = new Cursor(Cursor.WAIT_CURSOR);
protected HighResolutionTerrain terrain;
protected RenderableLayer gridLayer;
protected RenderableLayer intersectionsLayer;
protected RenderableLayer sightLinesLayer;
protected RenderableLayer tilesLayer;
protected Thread calculationDispatchThread;
protected JProgressBar progressBar;
protected ThreadPoolExecutor threadPool;
protected List<Position> grid;
protected int numGridPoints; // used to monitor percentage progress
protected long startTime, endTime; // for reporting calculation duration
protected Position previousCurrentPosition;
public AppFrame() {
super(true, true, false);
// Create a thread pool.
this.threadPool =
new ThreadPoolExecutor(
NUM_THREADS,
NUM_THREADS,
200,
TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>());
// Display a progress bar.
this.progressBar = new JProgressBar(0, 100);
this.progressBar.setBorder(new EmptyBorder(0, 10, 0, 10));
this.progressBar.setBorderPainted(false);
this.progressBar.setStringPainted(true);
this.layerPanel.add(this.progressBar, BorderLayout.SOUTH);
// Be sure to re-use the Terrain object to take advantage of its caching.
this.terrain = new HighResolutionTerrain(getWwd().getModel().getGlobe(), TARGET_RESOLUTION);
this.gridLayer = new RenderableLayer();
this.gridLayer.setName("Grid");
this.getWwd().getModel().getLayers().add(this.gridLayer);
this.intersectionsLayer = new RenderableLayer();
this.intersectionsLayer.setName("Intersections");
this.getWwd().getModel().getLayers().add(this.intersectionsLayer);
this.sightLinesLayer = new RenderableLayer();
this.sightLinesLayer.setName("Sight Lines");
this.getWwd().getModel().getLayers().add(this.sightLinesLayer);
// Set up a mouse handler to generate a grid and start intersection calculations when the user
// shift-clicks.
this.getWwd()
.getInputHandler()
.addMouseListener(
new MouseAdapter() {
public void mouseClicked(MouseEvent mouseEvent) {
// Control-Click cancels any currently running operation.
if ((mouseEvent.getModifiers() & ActionEvent.CTRL_MASK) != 0) {
if (calculationDispatchThread != null && calculationDispatchThread.isAlive())
calculationDispatchThread.interrupt();
return;
}
// Alt-Click repeats the most recent calculations.
if ((mouseEvent.getModifiers() & ActionEvent.ALT_MASK) != 0) {
if (previousCurrentPosition == null) return;
mouseEvent.consume(); // tell the rest of WW that this event has been processed
computeAndShowIntersections(previousCurrentPosition);
return;
}
// Perform the intersection tests in response to Shift-Click.
if ((mouseEvent.getModifiers() & ActionEvent.SHIFT_MASK) == 0) return;
mouseEvent.consume(); // tell the rest of WW that this event has been processed
final Position pos = getWwd().getCurrentPosition();
if (pos == null) return;
computeAndShowIntersections(pos);
}
});
}
protected void computeAndShowIntersections(final Position curPos) {
this.previousCurrentPosition = curPos;
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
setCursor(WaitCursor);
}
});
// Dispatch the calculation threads in a separate thread to avoid locking up the user
// interface.
this.calculationDispatchThread =
new Thread(
new Runnable() {
public void run() {
try {
performIntersectionTests(curPos);
} catch (InterruptedException e) {
System.out.println("Operation was interrupted");
}
}
});
this.calculationDispatchThread.start();
}
// Create containers to hold the intersection points and the lines emanating from the center.
protected List<Position> firstIntersectionPositions = new ArrayList<Position>();
protected List<Position[]> sightLines =
new ArrayList<Position[]>(GRID_DIMENSION * GRID_DIMENSION);
// Make the picked location's position and model-coordinate point available to all methods.
protected Position referencePosition;
protected Vec4 referencePoint;
// This is a collection of synchronized accessors to the list updated during the calculations.
protected synchronized void addIntersectionPosition(Position position) {
this.firstIntersectionPositions.add(position);
}
protected synchronized void addSightLine(Position positionA, Position positionB) {
this.sightLines.add(new Position[] {positionA, positionB});
}
protected synchronized int getSightlinesSize() {
return this.sightLines.size();
}
private long lastTime = System.currentTimeMillis();
/** Keeps the progress meter current. When calculations are complete, displays the results. */
protected synchronized void updateProgress() {
// Update the progress bar only once every 250 milliseconds to avoid stealing time from
// calculations.
if (this.sightLines.size() >= this.numGridPoints) endTime = System.currentTimeMillis();
else if (System.currentTimeMillis() < this.lastTime + 250) return;
this.lastTime = System.currentTimeMillis();
// On the EDT, update the progress bar and if calculations are complete, update the World
// Window.
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
int progress = (int) (100d * getSightlinesSize() / (double) numGridPoints);
progressBar.setValue(progress);
if (progress >= 100) {
setCursor(Cursor.getDefaultCursor());
progressBar.setString((endTime - startTime) + " ms");
showResults();
System.out.printf("Calculation time %d milliseconds\n", endTime - startTime);
}
}
});
}
/** Updates the World Wind model with the new intersection locations and sight lines. */
protected void showResults() {
this.showIntersections(firstIntersectionPositions);
this.showSightLines(sightLines);
// this.showIntersectingTiles(this.grid, this.referencePosition);
this.getWwd().redraw();
}
protected void performIntersectionTests(final Position curPos) throws InterruptedException {
// Clear the results lists when the user selects a new location.
this.firstIntersectionPositions.clear();
this.sightLines.clear();
// Raise the selected location and the grid points a little above ground just to show we can.
final double height = 5; // meters
// Form the grid.
double gridRadius = GRID_RADIUS.degrees;
Sector sector =
Sector.fromDegrees(
curPos.getLatitude().degrees - gridRadius, curPos.getLatitude().degrees + gridRadius,
curPos.getLongitude().degrees - gridRadius,
curPos.getLongitude().degrees + gridRadius);
this.grid = buildGrid(sector, height, GRID_DIMENSION, GRID_DIMENSION);
this.numGridPoints = grid.size();
// Compute the position of the selected location (incorporate its height).
this.referencePosition = new Position(curPos.getLatitude(), curPos.getLongitude(), height);
this.referencePoint =
terrain.getSurfacePoint(curPos.getLatitude(), curPos.getLongitude(), height);
// // Pre-caching is unnecessary and is useful only when it occurs before the
// intersection
// // calculations. It will incur extra overhead otherwise. The normal intersection
// calculations
// // cause the same caching, making subsequent calculations on the same area
// faster.
// this.preCache(grid, this.referencePosition);
// On the EDT, show the grid.
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
progressBar.setValue(0);
progressBar.setString(null);
clearLayers();
showGrid(grid, referencePosition);
getWwd().redraw();
}
});
// Perform the intersection calculations.
this.startTime = System.currentTimeMillis();
for (Position gridPos : this.grid) // for each grid point.
{
//noinspection ConstantConditions
if (NUM_THREADS > 0) this.threadPool.execute(new Intersector(gridPos));
else performIntersection(gridPos);
}
}
/**
* Performs one line of sight calculation between the reference position and a specified grid
* position.
*
* @param gridPosition the grid position.
* @throws InterruptedException if the operation is interrupted.
*/
protected void performIntersection(Position gridPosition) throws InterruptedException {
// Intersect the line between this grid point and the selected position.
Intersection[] intersections = this.terrain.intersect(this.referencePosition, gridPosition);
if (intersections == null || intersections.length == 0) {
// No intersection, so the line goes from the center to the grid point.
this.sightLines.add(new Position[] {this.referencePosition, gridPosition});
return;
}
// Only the first intersection is shown.
Vec4 iPoint = intersections[0].getIntersectionPoint();
Vec4 gPoint =
terrain.getSurfacePoint(
gridPosition.getLatitude(), gridPosition.getLongitude(), gridPosition.getAltitude());
// Check to see whether the intersection is beyond the grid point.
if (iPoint.distanceTo3(this.referencePoint) >= gPoint.distanceTo3(this.referencePoint)) {
// Intersection is beyond the grid point; the line goes from the center to the grid point.
this.addSightLine(this.referencePosition, gridPosition);
return;
}
// Compute the position corresponding to the intersection.
Position iPosition = this.terrain.getGlobe().computePositionFromPoint(iPoint);
// The sight line goes from the user-selected position to the intersection position.
this.addSightLine(this.referencePosition, new Position(iPosition, 0));
// Keep track of the intersection positions.
this.addIntersectionPosition(iPosition);
this.updateProgress();
}
/** Inner {@link Runnable} to perform a single line/terrain intersection calculation. */
protected class Intersector implements Runnable {
protected final Position gridPosition;
public Intersector(Position gridPosition) {
this.gridPosition = gridPosition;
}
public void run() {
try {
performIntersection(this.gridPosition);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
protected List<Position> buildGrid(Sector sector, double height, int nLatCells, int nLonCells) {
List<Position> grid = new ArrayList<Position>((nLatCells + 1) * (nLonCells + 1));
double dLat = sector.getDeltaLatDegrees() / nLatCells;
double dLon = sector.getDeltaLonDegrees() / nLonCells;
for (int j = 0; j <= nLatCells; j++) {
double lat =
j == nLatCells
? sector.getMaxLatitude().degrees
: sector.getMinLatitude().degrees + j * dLat;
for (int i = 0; i <= nLonCells; i++) {
double lon =
i == nLonCells
? sector.getMaxLongitude().degrees
: sector.getMinLongitude().degrees + i * dLon;
grid.add(Position.fromDegrees(lat, lon, height));
}
}
return grid;
}
protected void preCache(List<Position> grid, Position centerPosition)
throws InterruptedException {
// Pre-cache the tiles that will be needed for the intersection calculations.
double n = 0;
final long start = System.currentTimeMillis();
for (Position gridPos : grid) // for each grid point.
{
final double progress = 100 * (n++ / grid.size());
terrain.cacheIntersectingTiles(centerPosition, gridPos);
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
progressBar.setValue((int) progress);
progressBar.setString(null);
}
});
}
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
progressBar.setValue(100);
}
});
long end = System.currentTimeMillis();
System.out.printf(
"Pre-caching time %d milliseconds, cache usage %f, tiles %d\n",
end - start, terrain.getCacheUsage(), terrain.getNumCacheEntries());
}
protected void clearLayers() {
this.intersectionsLayer.removeAllRenderables();
this.sightLinesLayer.removeAllRenderables();
this.gridLayer.removeAllRenderables();
}
protected void showIntersections(List<Position> intersections) {
this.intersectionsLayer.removeAllRenderables();
// Display the intersections as CYAN points.
PointPlacemarkAttributes intersectionPointAttributes;
intersectionPointAttributes = new PointPlacemarkAttributes();
intersectionPointAttributes.setLineMaterial(Material.CYAN);
intersectionPointAttributes.setScale(6d);
intersectionPointAttributes.setUsePointAsDefaultImage(true);
for (Position p : intersections) {
PointPlacemark pm = new PointPlacemark(p);
pm.setAltitudeMode(WorldWind.CLAMP_TO_GROUND);
pm.setAttributes(intersectionPointAttributes);
pm.setValue(AVKey.DISPLAY_NAME, p.toString());
this.intersectionsLayer.addRenderable(pm);
}
}
protected void showSightLines(List<Position[]> sightLines) {
this.sightLinesLayer.removeAllRenderables();
// Display the sight lines as green lines.
ShapeAttributes lineAttributes;
lineAttributes = new BasicShapeAttributes();
lineAttributes.setDrawOutline(true);
lineAttributes.setDrawInterior(false);
lineAttributes.setOutlineMaterial(Material.GREEN);
lineAttributes.setOutlineOpacity(0.6);
for (Position[] pp : sightLines) {
List<Position> endPoints = new ArrayList<Position>();
endPoints.add(pp[0]);
endPoints.add(pp[1]);
Path path = new Path(endPoints);
path.setAltitudeMode(WorldWind.RELATIVE_TO_GROUND);
path.setAttributes(lineAttributes);
this.sightLinesLayer.addRenderable(path);
}
}
protected void showGridSightLines(List<Position> grid, Position cPos) {
this.sightLinesLayer.removeAllRenderables();
// Display lines from the center to each grid point.
ShapeAttributes lineAttributes;
lineAttributes = new BasicShapeAttributes();
lineAttributes.setDrawOutline(true);
lineAttributes.setDrawInterior(false);
lineAttributes.setOutlineMaterial(Material.GREEN);
lineAttributes.setOutlineOpacity(0.6);
for (Position p : grid) {
List<Position> endPoints = new ArrayList<Position>();
endPoints.add(cPos);
endPoints.add(new Position(p.getLatitude(), p.getLongitude(), 0));
Path path = new Path(endPoints);
path.setAltitudeMode(WorldWind.RELATIVE_TO_GROUND);
path.setAttributes(lineAttributes);
this.sightLinesLayer.addRenderable(path);
}
}
protected void showGrid(List<Position> grid, Position cPos) {
this.gridLayer.removeAllRenderables();
// Display the grid points in yellow.
PointPlacemarkAttributes gridPointAttributes;
gridPointAttributes = new PointPlacemarkAttributes();
gridPointAttributes.setLineMaterial(Material.YELLOW);
gridPointAttributes.setScale(6d);
gridPointAttributes.setUsePointAsDefaultImage(true);
for (Position p : grid) {
PointPlacemark pm = new PointPlacemark(p);
pm.setAltitudeMode(WorldWind.RELATIVE_TO_GROUND);
pm.setAttributes(gridPointAttributes);
pm.setLineEnabled(true);
pm.setValue(AVKey.DISPLAY_NAME, p.toString());
this.gridLayer.addRenderable(pm);
}
showCenterPoint(cPos);
}
protected void showCenterPoint(Position cPos) {
// Display the center point in red.
PointPlacemarkAttributes selectedLocationAttributes;
selectedLocationAttributes = new PointPlacemarkAttributes();
selectedLocationAttributes.setLineMaterial(Material.RED);
selectedLocationAttributes.setScale(8d);
selectedLocationAttributes.setUsePointAsDefaultImage(true);
PointPlacemark pm = new PointPlacemark(cPos);
pm.setAltitudeMode(WorldWind.RELATIVE_TO_GROUND);
pm.setAttributes(selectedLocationAttributes);
pm.setValue(AVKey.DISPLAY_NAME, cPos.toString());
pm.setLineEnabled(true);
this.gridLayer.addRenderable(pm);
}
}
protected double[] resizeArray(double[] oldArray) {
int newSize = 2 * oldArray.length;
double[] newArray = new double[newSize];
System.arraycopy(oldArray, 0, newArray, 0, oldArray.length);
return newArray;
}
protected int[] resizeArray(int[] oldArray) {
int newSize = 2 * oldArray.length;
int[] newArray = new int[newSize];
System.arraycopy(oldArray, 0, newArray, 0, oldArray.length);
return newArray;
}
protected static String getUserHomeDir() {
return System.getProperty("user.home");
}