public static String memoryToString() {
DecimalFormat fmt = new DecimalFormat("0.0");
return "Memory: "
+ fmt.format(RUNTIME.maxMemory() / 1048576D)
+ "MByte maximum, "
+ fmt.format(RUNTIME.totalMemory() / 1048576D)
+ "MByte total, "
+ fmt.format(RUNTIME.totalMemory() / 1048576D)
+ "MByte free";
}
public static void showDesktop() { // Windows only
try {
if (SystemUtils.isWinPlatform())
RUNTIME.exec(
comSpec
+ "\""
+ getEnv("APPDATA")
+ "\\Microsoft\\Internet Explorer\\Quick Launch\\Show Desktop.scf\"");
} catch (IOException e) {
e.printStackTrace();
}
}
public static int ensureNTServiceIsRunning(String serviceName, String service) throws Exception {
ArrayList<String> serviceList = getRunningNTServices();
if (serviceList == null) return -1; // not NT kernel?
for (String svc : serviceList) {
if (serviceName.equals(svc.trim())) return 0; // service already running
}
Process process = RUNTIME.exec(comSpec + "net start \"" + service + "\"");
process.waitFor(); // wait for the process to complete
int rc = process.exitValue(); // pick up its return code
boolean success = (rc == 0);
if (success) System.out.println("Successfully started service '" + serviceName + "'.");
return (success ? 1 : -1);
}
/** Execute the system command 'cmd' and fill an ArrayList with the results. */
public static ArrayList<String> executeSystemCommand(String cmd) {
if (debug) System.out.println("cmd: " + cmd);
ArrayList<String> list = new ArrayList<>();
try (BufferedReader br =
new BufferedReader(
new InputStreamReader(RUNTIME.exec(/*comSpec +*/ cmd).getInputStream()))) {
for (String line = null; (line = br.readLine()) != null; ) {
if (debug) System.out.println(line);
list.add(line);
}
} catch (IOException e) {
e.printStackTrace();
}
return list;
}
public static String ping(String address) {
String reply = "Request timed out";
try (BufferedReader br =
new BufferedReader(
new InputStreamReader(RUNTIME.exec("ping " + address).getInputStream()))) {
for (String line = null; (line = br.readLine()) != null; ) {
if (line.trim().startsWith("Reply ")) {
reply = line;
break;
}
}
} catch (IOException e) {
e.printStackTrace();
}
return reply;
}
public static Properties getEnvironmentVariables() {
synchronized (cygstartPath) {
if (envVars != null) return envVars;
envVars = new Properties();
try (BufferedReader br =
new BufferedReader(
new InputStreamReader(RUNTIME.exec(comSpec + "env").getInputStream()))) {
for (String line = null; (line = br.readLine()) != null; ) {
// if (debug) System.out.println("getEnvironmentVariables(): line=" + line);
int idx = line.indexOf('=');
if (idx > 0) envVars.put(line.substring(0, idx), line.substring(idx + 1));
}
} catch (IOException e) {
e.printStackTrace();
}
return envVars;
}
}
public static void fullGC(boolean verbose) {
if (verbose)
System.out.print(
new Date().toString()
+ ' '
+ String.valueOf((RUNTIME.totalMemory() - RUNTIME.freeMemory()) / 1024L)
+ "Kb used");
long isFree = RUNTIME.freeMemory();
long wasFree;
do {
wasFree = isFree;
RUNTIME.runFinalization();
RUNTIME.gc();
isFree = RUNTIME.freeMemory();
} while (isFree > wasFree);
if (verbose)
System.out.println(
" --> "
+ String.valueOf((RUNTIME.totalMemory() - RUNTIME.freeMemory()) / 1024L)
+ "Kb used");
}
/**
* Class SystemUtils provides a set of useful methods for dealing with external processes. -
* launch(...): launch an external process - parseProcessOutput(): collects the stderr and stdout of
* a process and sends it to the stdout of the process in which it lives.<br>
* - parseProcessOutput(): invoke with:
*
* <pre> int rc = SystemUtils.parseProcessOutput(Runtime.getRuntime().exec(cmd), ...); </pre>
*
* In addition it provides a simple API for measuring and recording CPU usage. See individual
* methods for details.
*/
public final class SystemUtils {
private static final Runtime RUNTIME = Runtime.getRuntime();
private static Properties envVars = new Properties();
private static String cygstartPath = ""; // path to CygWin's cygutils' "cygstart" binary
private static boolean debug;
public static boolean getDebug() {
return debug;
}
public static void setDebug(boolean b) {
debug = b;
}
private static boolean ignoreWarnings;
public static boolean getIgnoreWarnings() {
return ignoreWarnings;
}
public static void setIgnoreWarnings(boolean b) {
ignoreWarnings = b;
}
private SystemUtils() {
/* empty private impl. prevents subclassing */
}
public static boolean isNTServiceIsRunning(String serviceName) {
ArrayList<String> serviceList = getRunningNTServices();
if (serviceList == null) return false; // not NT kernel?
for (String svc : serviceList) {
if (serviceName.equals(svc.trim())) return true; // service running
}
return false;
}
public static int ensureNTServiceIsRunning(String serviceName, String service) throws Exception {
ArrayList<String> serviceList = getRunningNTServices();
if (serviceList == null) return -1; // not NT kernel?
for (String svc : serviceList) {
if (serviceName.equals(svc.trim())) return 0; // service already running
}
Process process = RUNTIME.exec(comSpec + "net start \"" + service + "\"");
process.waitFor(); // wait for the process to complete
int rc = process.exitValue(); // pick up its return code
boolean success = (rc == 0);
if (success) System.out.println("Successfully started service '" + serviceName + "'.");
return (success ? 1 : -1);
}
private static ArrayList<String> getRunningNTServices() {
return (isWinPlatform() && !isWin9X)
? executeSystemCommand("net start")
: null; // what about WinME?
}
public static ArrayList<String> executeShellCommand(String cmd) {
return (isCygWin() || isUnix()) ? executeSystemCommand("sh " + cmd) : null;
}
/** Execute the system command 'cmd' and fill an ArrayList with the results. */
public static ArrayList<String> executeSystemCommand(String cmd) {
if (debug) System.out.println("cmd: " + cmd);
ArrayList<String> list = new ArrayList<>();
try (BufferedReader br =
new BufferedReader(
new InputStreamReader(RUNTIME.exec(/*comSpec +*/ cmd).getInputStream()))) {
for (String line = null; (line = br.readLine()) != null; ) {
if (debug) System.out.println(line);
list.add(line);
}
} catch (IOException e) {
e.printStackTrace();
}
return list;
}
/** Display default email client to type and send an email. */
public static void sendMail() throws IOException {
if (isWinPlatform())
RUNTIME.exec("rundll32 url.dll,FileProtocolHandler mailto:[email protected]?subject=Houdy");
}
/** Aggressively free up everything currently possible. */
public static void fullGC() {
fullGC(true);
}
public static void fullGC(boolean verbose) {
if (verbose)
System.out.print(
new Date().toString()
+ ' '
+ String.valueOf((RUNTIME.totalMemory() - RUNTIME.freeMemory()) / 1024L)
+ "Kb used");
long isFree = RUNTIME.freeMemory();
long wasFree;
do {
wasFree = isFree;
RUNTIME.runFinalization();
RUNTIME.gc();
isFree = RUNTIME.freeMemory();
} while (isFree > wasFree);
if (verbose)
System.out.println(
" --> "
+ String.valueOf((RUNTIME.totalMemory() - RUNTIME.freeMemory()) / 1024L)
+ "Kb used");
}
public static String memoryToString() {
DecimalFormat fmt = new DecimalFormat("0.0");
return "Memory: "
+ fmt.format(RUNTIME.maxMemory() / 1048576D)
+ "MByte maximum, "
+ fmt.format(RUNTIME.totalMemory() / 1048576D)
+ "MByte total, "
+ fmt.format(RUNTIME.totalMemory() / 1048576D)
+ "MByte free";
}
public static void quit(
int
exitCode) { // redirect to System.exit() as to reduce warnings by static code analysis
// tools
System.exit(exitCode);
}
// === CPU usage related stuff
// ======================================================================================================================================
/**
* Minimum time difference [in milliseconds] enforced for the inputs into
* getProcessCPUUsage(long[],long[]). The motivation for this restriction is the fact that <code>
* System.currentTimeMillis()</code> on some systems has a low resolution (e.g., 10ms on win32).
* The current value is 100 ms.
*/
public static final int MIN_ELAPSED_TIME = 100;
/**
* Creates a CPU usage data snapshot by associating CPU time used with system time. The resulting
* data can be fed into getProcessCPUUsage(long[],long[]).
*
* @return long[2] [0] current system time stamp, [1] process CPU time
*/
public static long[] makeCPUUsageSnapshot() {
return new long[] {System.currentTimeMillis(), getProcessCPUTime()};
}
/**
* Computes CPU usage (fraction of 1.0) between <code>start[1]</code> and <code>end[1]</code> time
* points [1.0 corresponds to 100% utilization of all processors].
*
* @throws IllegalArgumentException if start and end time points are less than #MIN_ELAPSED_TIME
* ms apart.
* @throws IllegalArgumentException if either argument is null
* @param start,end long[2]: [0] system time stamp, [1] process CPU time (as returned by
* makeCPUUsageSnapshot()).
*/
public static double getProcessCPUUsage(long[] start, long[] end) {
if (start == null) throw new IllegalArgumentException("null input: start");
if (end == null) throw new IllegalArgumentException("null input: end");
// if (end[0] < start[0] + MIN_ELAPSED_TIME) throw new IllegalArgumentException("end time must
// be at least " + MIN_ELAPSED_TIME + " ms later than start time");
end[0] = Math.max(end[0], start[0] + MIN_ELAPSED_TIME);
return ((double) (end[1] - start[1])) / (double) (end[0] - start[0]);
}
/**
* Returns the PID of the current process. The result is useful when you need to integrate a Java
* app with external tools.
*/
public static native int getProcessID();
/**
* Returns CPU (kernel + user) time used by the current process [in milliseconds]. The returned
* value is adjusted for the number of processors in the system.
*/
public static native long getProcessCPUTime();
/**
* Returns CPU usage (fraction of 1.0) so far by the current process. This is a total for all
* processors since the process creation time.
*/
// public static native double getProcessCPUUsage ();
// === OS related stuff
// ==========================================================================================================================================
private static boolean isWin7, isVista, isWinXP, isWin2k, isWinNT, isWin9X, isCygWin;
private static boolean isMac, isSolaris, isLinux, isUnix;
private static final String SYSLIB = "syslib";
private static String comSpec =
""; // the Windows / DOS command line processor, e.g. C:\WINDOWS\system32\cmd.exe
private static boolean startsWithIgnoreCase(String string, String prefix) {
if (string == null || string.isEmpty() || prefix == null) return false;
int l2 = prefix.length();
return (string.length() >= l2 && string.regionMatches(true, 0, prefix, 0, l2));
}
/**
* Try to determine whether this application is running under Windows or some other platform by
* examining the "os.name" property.
*/
static {
String os = System.getProperty("os.name");
// String version = System.getProperty("os.version"); // for Win7, reports "6.0" on JDK7, should
// be "6.1"; for Win8, reports "6.2" as of JDK7u17
if (SystemUtils.startsWithIgnoreCase(os, "windows 7"))
isWin7 = true; // reports "Windows Vista" on JDK7
else if (SystemUtils.startsWithIgnoreCase(os, "windows 8"))
isWin7 = true; // reports "Windows 8" as of JDK7u17
else if (SystemUtils.startsWithIgnoreCase(os, "windows vista")) isVista = true;
else if (SystemUtils.startsWithIgnoreCase(os, "windows xp")) isWinXP = true;
else if (SystemUtils.startsWithIgnoreCase(os, "windows 2000")) isWin2k = true;
else if (SystemUtils.startsWithIgnoreCase(os, "windows nt")) isWinNT = true;
else if (SystemUtils.startsWithIgnoreCase(os, "windows"))
isWin9X = true; // win95 or win98 (what about WinME?)
else if (SystemUtils.startsWithIgnoreCase(os, "mac")) isMac = true;
else if (SystemUtils.startsWithIgnoreCase(os, "so")) isSolaris = true; // sunos or solaris
else if (os.equalsIgnoreCase("linux")) isLinux = true;
else isUnix = true; // assume UNIX, e.g. AIX, HP-UX, IRIX
String osarch = System.getProperty("os.arch");
String arch = (osarch != null && osarch.contains("64")) ? "_x64" /* eg. 'amd64' */ : "_x32";
String syslib = SYSLIB + arch;
try { // loading a native lib in a static initializer ensures that it is available before any
// method in this class is called:
System.loadLibrary(syslib);
System.out.println(
"Done loading '" + System.mapLibraryName(syslib) + "', PID=" + getProcessID());
} catch (Error e) {
System.err.println(
"Native library '"
+ System.mapLibraryName(syslib)
+ "' not found in 'java.library.path': "
+ System.getProperty("java.library.path"));
throw e; // re-throw
}
if (isWinPlatform()) {
System.setProperty(
"line.separator", "\n"); // so we won't have to mess with DOS line endings ever again
comSpec =
getEnv(
"comSpec"); // use native method here since getEnvironmentVariable() needs to know
// comSpec
comSpec = (comSpec != null) ? comSpec + " /c " : "";
try (BufferedReader br =
new BufferedReader(
new InputStreamReader(
RUNTIME.exec(comSpec + "ver").getInputStream()))) { // fix for Win7,8
for (String line = null; (line = br.readLine()) != null; ) {
if (isVista && (line.contains("6.1" /*Win7*/) || line.contains("6.2" /*Win8*/))) {
isVista = false;
isWin7 = true;
}
}
} catch (IOException e) {
e.printStackTrace();
}
String cygdir = getEnv("cygdir"); // this is set during CygWin install to "?:/cygwin/bin"
isCygWin = (cygdir != null && !cygdir.equals("%cygdir%"));
cygstartPath = cygdir + "/cygstart.exe"; // path to CygWin's cygutils' "cygstart" binary
if (getDebug() && Desktop.isDesktopSupported()) {
Desktop desktop = Desktop.getDesktop();
for (Desktop.Action action : Desktop.Action.values())
System.out.println(
"Desktop action " + action + " supported? " + desktop.isSupported(action));
}
}
}
public static boolean isWinPlatform() {
return (isWin7 || isVista || isWinXP || isWin2k || isWinNT || isWin9X);
}
public static boolean isWin7() {
return isWin7;
} // true for Win7 & Win8
public static boolean isVista() {
return isVista;
}
public static boolean isWinXP() {
return isWinXP;
}
public static boolean isWin2k() {
return isWin2k;
}
public static boolean isWinNT() {
return isWinNT;
}
public static boolean isWin9X() {
return isWin9X;
}
public static boolean isMac() {
return isMac;
}
public static boolean isSolaris() {
return isSolaris;
}
public static boolean isLinux() {
return isLinux;
}
public static boolean isUnix() {
return isUnix || isSolaris || isLinux || isMac /*assume OSX*/;
}
public static boolean isCygWin() {
return isCygWin;
}
public static boolean isCaseSensitive() {
return isUnix();
}
public static String getOSType() {
if (isWinPlatform()) return "Windows";
if (isLinux()) return "Linux";
if (isUnix()) return "Unix";
if (isMac()) return "Mac";
return "unknown";
}
/** Return the name of the Null device on platforms which support it, or "junk" otherwise. */
public static String getDevNull() {
return (isWinPlatform() ? "NUL:" : (isUnix() ? "/dev/null" : "junk"));
}
public static boolean isJava7() {
return System.getProperty("java.version").startsWith("1.7");
}
/**
* Determine whether the current platform has CygWin's cygutils being installed in their default
* location.
*/
public static boolean hasCygUtils() {
return (isCygWin && new File(cygstartPath).exists());
}
public static void showDesktop() { // Windows only
try {
if (SystemUtils.isWinPlatform())
RUNTIME.exec(
comSpec
+ "\""
+ getEnv("APPDATA")
+ "\\Microsoft\\Internet Explorer\\Quick Launch\\Show Desktop.scf\"");
} catch (IOException e) {
e.printStackTrace();
}
}
/** Determine whether the current user has Windows administrator privileges. */
public static boolean isWinAdmin() {
if (!isWinPlatform()) return false;
// for (String group : new com.sun.security.auth.module.NTSystem().getGroupIDs()) {
// if (group.equals("S-1-5-32-544")) return true; // "S-1-5-32-544" is a well-known
// security identifier in Windows. If the current user has it then he/she/it is an
// administrator.
// }
// return false;
try {
Class<?> ntsys = Class.forName("com.sun.security.auth.module.NTSystem");
if (ntsys != null) {
Object groupObj =
SystemUtils.invoke(
ntsys.newInstance(), ntsys.getDeclaredMethod("getGroupIDs"), (Object[]) null);
if (groupObj instanceof String[]) {
for (String group : (String[]) groupObj) {
if (group.equals("S-1-5-32-544"))
return true; // "S-1-5-32-544" is a well-known security identifier in Windows. If the
// current user has it then he/she/it is an administrator.
}
}
}
} catch (ReflectiveOperationException e) {
System.err.println(e);
}
return false;
}
// === environment variable stuff
// ==================================================================================================================
public static String getHomePath() {
String home = System.getProperty("HOME");
if (home == null) {
try {
String thisPath = SystemUtils.class.getResource("SystemUtils.class").getPath();
String thisPkg = SystemUtils.class.getPackage().getName();
home = thisPath.substring(0, thisPath.indexOf(thisPkg.substring(0, thisPkg.indexOf('.'))));
} catch (Exception e) {
e.printStackTrace();
}
}
if (home == null) home = "";
return home;
}
/** Print all system property keys and values. */
public static void printSystemProperties() {
Properties p = System.getProperties();
for (Object key : p.keySet()) System.out.println(key + ": " + p.getProperty(key.toString()));
}
public static Properties getEnvironmentVariables() {
synchronized (cygstartPath) {
if (envVars != null) return envVars;
envVars = new Properties();
try (BufferedReader br =
new BufferedReader(
new InputStreamReader(RUNTIME.exec(comSpec + "env").getInputStream()))) {
for (String line = null; (line = br.readLine()) != null; ) {
// if (debug) System.out.println("getEnvironmentVariables(): line=" + line);
int idx = line.indexOf('=');
if (idx > 0) envVars.put(line.substring(0, idx), line.substring(idx + 1));
}
} catch (IOException e) {
e.printStackTrace();
}
return envVars;
}
}
// public static String[] getEnvironment () { return getEnvironmentVariables().toArray(); }
/** Returns the setting of an environment variable set inside the JVM. */
public static String getEnvironmentVariable(String envVarName) {
if (envVars == null) envVars = getEnvironmentVariables();
return (String) envVars.get(envVarName);
}
/**
* Returns the setting of an environment variable using JNI. Use this method to obtain env
* settings known outside the JVM.
*/
public static native String getEnv(String envVarName);
/** Returns the name of the file pointed to by a Windows shortcut (.lnk) using JNI. */
public static native String readLnk(String lnkName);
/**
* Creates a Windows link to a specified target. e.g. SystemUtils.createLnk("X:\\jodel",
* "Y:\\Stuff\\Edit1.txt", "Y:\\Stuff\\", "jodel"); creates lnk file 'X:/jodel.lnk' which is
* shortcut to 'Y:/Stuff/Edit1.txt'.
*/
public static native int createLnk(
String lnkName, String targetName, String targetPath, String desc);
/** Moves a file to the Windows RecycleBin'. */
public static native void sendToRecycleBin(String fileName);
/** Returns the Windows volume label assigned to a FAT or NTFS drive letter using JNI. */
public static native String getVolumeLabel(String drive);
/** Sets the specified Windows volume's label. */
public static native boolean setVolumeLabel(String drive, String label);
public static final int DRIVE_UNKNOWN = 0;
/** The drive type cannot be determined. */
public static final int DRIVE_NO_ROOT_DIR = 1;
/** The root directory does not exist. */
public static final int DRIVE_REMOVABLE = 2;
/** The disk can be removed from the drive. */
public static final int DRIVE_FIXED = 3;
/** The disk cannot be removed from the drive. */
public static final int DRIVE_REMOTE = 4;
/** The drive is a remote (network) drive. */
public static final int DRIVE_CDROM = 5;
/** The drive is a CD-ROM drive. */
public static final int DRIVE_RAMDISK = 6;
/** The drive is a RAM disk. */
/** Retrieves the specified drive's type. */
public static native int getDriveType(String drive);
/** Set the NTFS file compression attribute on file named 'fileName'. */
public static native void setNTFSCompression(String fileName);
public static native boolean isNTFSCompressed(String pathName);
/**
* Retrieves the Win32 window handle for the specified window title.
*
* @param <CODE>title</CODE> the title of the window whose Win32 window handle to retrieve
* @return an <CODE>int</CODE> representing the Win32 window handle for the specified window title
*/
public static native int getHwnd(String title);
/**
* Sets the specified window as the topmost window in the z-order.
*
* @param <CODE>hwnd</CODE> the window's Win32 handle
* @param <CODE>flag</CODE> a <CODE>boolean</CODE> parameter that specifies whether the window
* will be the topmost window in the z-order. <CODE><B>true</B></CODE> sets the window as the
* topmost window in the z-order, <CODE><B>false</B></CODE> sets the window behind all topmost
* windows.
* @see #getHwnd
*/
public static native void setWindowAlwaysOnTop(int hwnd, boolean flag);
/**
* Retrieves the current directory.
*
* @return a <CODE>String</CODE> representing the current directory
*/
public static native String getCurrentDirectory();
// =============================================================================================================================================
public static String ping(String address) {
String reply = "Request timed out";
try (BufferedReader br =
new BufferedReader(
new InputStreamReader(RUNTIME.exec("ping " + address).getInputStream()))) {
for (String line = null; (line = br.readLine()) != null; ) {
if (line.trim().startsWith("Reply ")) {
reply = line;
break;
}
}
} catch (IOException e) {
e.printStackTrace();
}
return reply;
}
/**
* This method runs the Runnable and measures how long it takes.
*
* @param r is the Runnable for the task that we want to measure
* @return the time it took to execute this task
*/
public static long time(Runnable r) {
long time = -System.currentTimeMillis();
r.run();
time += System.currentTimeMillis();
System.out.println("Took " + time + "ms");
return time;
}
/** Invoke a method on an object using reflection. */
public static Object invoke(final Object target, final Method method, final Object... args) {
try {
return AccessController.doPrivileged(
new PrivilegedExceptionAction<Object>() {
public Object run() throws IllegalAccessException, InvocationTargetException {
if (!method.isAccessible())
method.setAccessible(
true); // Say please - else invoke() will fail if method is protected
return method.invoke(target, args);
}
});
} catch (PrivilegedActionException e) {
e.printStackTrace();
}
return null;
}
// public static <T extends Object> T makeAccessible (final T obj) {
// try {
// AccessController.doPrivileged(new PrivilegedExceptionAction<Object> () {
// public Object run () throws IllegalAccessException, InvocationTargetException {
// if (obj instanceof Method) ((Method) obj).setAccessible(true);
// if (obj instanceof Field ) ((Field ) obj).setAccessible(true);
// return obj;
// }
// });
// } catch (PrivilegedActionException e) { IError.printStackTrace(e); }
// return obj;
// }
public static Field makeAccessible(Class<?> target, String fieldName) {
try {
final Field field = target.getDeclaredField(fieldName);
return (Field)
AccessController.doPrivileged(
new PrivilegedExceptionAction<Object>() {
public Object run() throws IllegalAccessException, InvocationTargetException {
if (!field.isAccessible()) field.setAccessible(true);
return field;
}
});
} catch (NoSuchFieldException | PrivilegedActionException e) {
System.out.print("");
} // keep quiet IError.printStackTrace(e); }
return null;
}
public static Frame getSharedOwnerFrame() {
try {
Method getSharedOwnerFrame =
SwingUtilities.class.getDeclaredMethod("getSharedOwnerFrame"); // package-protected
Object frame =
SystemUtils.invoke(
null,
getSharedOwnerFrame); // getSharedOwnerFrame() is static - invoke it on null object
return (frame instanceof Frame) ? (Frame) frame : null;
} catch (NoSuchMethodException | SecurityException e) {
e.printStackTrace();
}
return null;
}
// =============================================================================================================================================
private static final String WINDOWS_DESKTOP = "Desktop";
/** Return the current user desktop path. */
public static String getWindowsCurrentUserDesktopPath() {
return System.getenv("userprofile") + '/' + WINDOWS_DESKTOP;
}
/**
* Create an Internet shortcut on User's Desktop no icon specified, e.g.
* SystemUtils.createInternetShortcutOnDesktop("GOOGLE", "http://www.google.com");
*
* @param name name of the shortcut
* @param target URL
*/
public static void createInternetShortcutOnDesktop(String name, String target) {
createInternetShortcut(
name, getWindowsCurrentUserDesktopPath() + '/' + name + ".URL", target, "");
}
/**
* Create an Internet shortcut on User's Desktop, icon specified.
*
* @param name name of the shortcut
* @param target URL
* @param icon URL (ex. http://www.server.com/favicon.ico)
*/
public static void createInternetShortcutOnDesktop(String name, String target, String icon) {
createInternetShortcut(
name, getWindowsCurrentUserDesktopPath() + '/' + name + ".URL", target, icon);
}
/**
* Create an Internet shortcut
*
* @param name name of the shortcut
* @param where location of the shortcut
* @param target URL
* @param icon URL (ex. http://www.server.com/favicon.ico)
*/
public static void createInternetShortcut(String name, String where, String target, String icon) {
try (FileWriter fw = new FileWriter(where)) {
fw.write("[InternetShortcut]\n");
fw.write("URL=" + target + '\n');
if (!icon.isEmpty()) fw.write("IconFile=" + icon + '\n');
} catch (IOException iox) {
/**/
}
}
public static void setClipboardText(String text) {
Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new StringSelection(text), null);
}
// =============================================================================================================================================
// open application associated to a file extension
public static void open(File document) throws IOException {
if (Desktop.isDesktopSupported()) Desktop.getDesktop().open(document);
}
// print a file
public static void print(File document) throws IOException {
if (Desktop.isDesktopSupported()) Desktop.getDesktop().print(document);
}
// open URL in default browser
public static void browse(URI document) throws IOException {
if (Desktop.isDesktopSupported()) Desktop.getDesktop().browse(document);
}
// open default mail client (use the mailto: protocol as the URI), eg.:
// mailto:[email protected]?SUBJECT=Love me tender&BODY=love me sweet
public static void mail(URI document) throws IOException {
if (Desktop.isDesktopSupported()) Desktop.getDesktop().mail(document);
}
} // end class SystemUtils
/**
* Try to determine whether this application is running under Windows or some other platform by
* examining the "os.name" property.
*/
static {
String os = System.getProperty("os.name");
// String version = System.getProperty("os.version"); // for Win7, reports "6.0" on JDK7, should
// be "6.1"; for Win8, reports "6.2" as of JDK7u17
if (SystemUtils.startsWithIgnoreCase(os, "windows 7"))
isWin7 = true; // reports "Windows Vista" on JDK7
else if (SystemUtils.startsWithIgnoreCase(os, "windows 8"))
isWin7 = true; // reports "Windows 8" as of JDK7u17
else if (SystemUtils.startsWithIgnoreCase(os, "windows vista")) isVista = true;
else if (SystemUtils.startsWithIgnoreCase(os, "windows xp")) isWinXP = true;
else if (SystemUtils.startsWithIgnoreCase(os, "windows 2000")) isWin2k = true;
else if (SystemUtils.startsWithIgnoreCase(os, "windows nt")) isWinNT = true;
else if (SystemUtils.startsWithIgnoreCase(os, "windows"))
isWin9X = true; // win95 or win98 (what about WinME?)
else if (SystemUtils.startsWithIgnoreCase(os, "mac")) isMac = true;
else if (SystemUtils.startsWithIgnoreCase(os, "so")) isSolaris = true; // sunos or solaris
else if (os.equalsIgnoreCase("linux")) isLinux = true;
else isUnix = true; // assume UNIX, e.g. AIX, HP-UX, IRIX
String osarch = System.getProperty("os.arch");
String arch = (osarch != null && osarch.contains("64")) ? "_x64" /* eg. 'amd64' */ : "_x32";
String syslib = SYSLIB + arch;
try { // loading a native lib in a static initializer ensures that it is available before any
// method in this class is called:
System.loadLibrary(syslib);
System.out.println(
"Done loading '" + System.mapLibraryName(syslib) + "', PID=" + getProcessID());
} catch (Error e) {
System.err.println(
"Native library '"
+ System.mapLibraryName(syslib)
+ "' not found in 'java.library.path': "
+ System.getProperty("java.library.path"));
throw e; // re-throw
}
if (isWinPlatform()) {
System.setProperty(
"line.separator", "\n"); // so we won't have to mess with DOS line endings ever again
comSpec =
getEnv(
"comSpec"); // use native method here since getEnvironmentVariable() needs to know
// comSpec
comSpec = (comSpec != null) ? comSpec + " /c " : "";
try (BufferedReader br =
new BufferedReader(
new InputStreamReader(
RUNTIME.exec(comSpec + "ver").getInputStream()))) { // fix for Win7,8
for (String line = null; (line = br.readLine()) != null; ) {
if (isVista && (line.contains("6.1" /*Win7*/) || line.contains("6.2" /*Win8*/))) {
isVista = false;
isWin7 = true;
}
}
} catch (IOException e) {
e.printStackTrace();
}
String cygdir = getEnv("cygdir"); // this is set during CygWin install to "?:/cygwin/bin"
isCygWin = (cygdir != null && !cygdir.equals("%cygdir%"));
cygstartPath = cygdir + "/cygstart.exe"; // path to CygWin's cygutils' "cygstart" binary
if (getDebug() && Desktop.isDesktopSupported()) {
Desktop desktop = Desktop.getDesktop();
for (Desktop.Action action : Desktop.Action.values())
System.out.println(
"Desktop action " + action + " supported? " + desktop.isSupported(action));
}
}
}
/** Display default email client to type and send an email. */
public static void sendMail() throws IOException {
if (isWinPlatform())
RUNTIME.exec("rundll32 url.dll,FileProtocolHandler mailto:[email protected]?subject=Houdy");
}
