Java Field.getLong方法代碼示例

import java.lang.reflect.Field; //導入方法依賴的package包/類
public long getLongVolatile(Object obj, long offset)
{
    if (obj instanceof cli.System.Array)
    {
        synchronized(this)
        {
            return ReadInt64(obj, offset);
        }
    }
    else
    {
        Field field = getField(offset);
        synchronized(field)
        {
            try
            {
                return field.getLong(obj);
            }
            catch(IllegalAccessException x)
            {
                throw (InternalError)new InternalError().initCause(x);
            }
        }
    }
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
/**
 * @param process NiFi Registry Process Reference
 * @param logger  Logger Reference for Debug
 * @return        Returns pid or null in-case pid could not be determined
 * This method takes {@link Process} and {@link Logger} and returns
 * the platform specific Handle for Win32 Systems, a.k.a <b>pid</b>
 * In-case it fails to determine the pid, it will return Null.
 * Purpose for the Logger is to log any interaction for debugging.
 */
private static Long getWindowsProcessId(final Process process, final Logger logger) {
    /* determine the pid on windows plattforms */
    try {
        Field f = process.getClass().getDeclaredField("handle");
        f.setAccessible(true);
        long handl = f.getLong(process);

        Kernel32 kernel = Kernel32.INSTANCE;
        WinNT.HANDLE handle = new WinNT.HANDLE();
        handle.setPointer(Pointer.createConstant(handl));
        int ret = kernel.GetProcessId(handle);
        logger.debug("Detected pid: {}", ret);
        return Long.valueOf(ret);
    } catch (final IllegalAccessException | NoSuchFieldException nsfe) {
        logger.debug("Could not find PID for child process due to {}", nsfe);
    }
    return null;
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
@Override
protected long getProcessId(Process process) {
    long result = super.getProcessId(process);
    if (result == 0L) {
        /* jtreg didn't find pid, most probably we are on JDK < 9
           there is no Process::getPid */
        if (HAS_NATIVE_LIBRARY && "windows".equals(OS.current().family)) {
            try {
                Field field = process.getClass().getDeclaredField("handle");
                boolean old = field.isAccessible();
                try {
                    field.setAccessible(true);
                    long handle = field.getLong(process);
                    result = getWin32Pid(handle);
                } finally {
                    field.setAccessible(old);
                }
            } catch (ReflectiveOperationException e) {
                e.printStackTrace(log);
            }
        }
    }
    return result;
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
void serialize(AbstractHessianOutput out, Object obj, Field field)
     throws IOException
   {
     long value = 0;

     try {
value = field.getLong(obj);
     } catch (IllegalAccessException e) {
log.log(Level.FINE, e.toString(), e);
     }

     out.writeLong(value);
   }
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
public static <T extends ILKDBModel> long getRowid(T mode){
    LKModelInfos infos =  getModelInfos(mode.getClass());
    String rowidName = infos.getDb_rowidAliasName();
    if(TextUtils.isEmpty(rowidName)){
        return 0;
    }
    Field field = infos.getFieldMaps().get(rowidName);
    long rowid = 0;
    try {
        rowid = field.getLong(mode);
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
    return rowid;
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
@Test
public void scanNotActiveChannel() throws Exception {
    producerManager.registerProducer(group, clientInfo);
    assertThat(producerManager.getGroupChannelTable().get(group).get(channel)).isNotNull();

    Field field = ProducerManager.class.getDeclaredField("CHANNEL_EXPIRED_TIMEOUT");
    field.setAccessible(true);
    long CHANNEL_EXPIRED_TIMEOUT = field.getLong(producerManager);
    clientInfo.setLastUpdateTimestamp(System.currentTimeMillis() - CHANNEL_EXPIRED_TIMEOUT - 10);
    when(channel.close()).thenReturn(mock(ChannelFuture.class));
    producerManager.scanNotActiveChannel();
    assertThat(producerManager.getGroupChannelTable().get(group).get(channel)).isNull();
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
private long getLong(Object object, String id) {
    long value = 0l;
    try {
        Field field = object.getClass().getDeclaredField(id);
        field.setAccessible(true);
        value = field.getLong(object);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return value;
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
private static void initFx() {
    AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
        System.setProperty("javafx.embed.isEventThread", "true");
        System.setProperty("glass.win.uiScale", "100%");
        System.setProperty("glass.win.renderScale", "100%");
        return null;
    });
    Map map = Application.getDeviceDetails();
    if (map == null) {
        Application.setDeviceDetails(map = new HashMap());
    }
    if (map.get("javafx.embed.eventProc") == null) {
        long eventProc = 0;
        try {
            Field field = Display.class.getDeclaredField("eventProc");
            field.setAccessible(true);
            if (field.getType() == int.class) {
                eventProc = field.getLong(Display.getDefault());
            } else {
                if (field.getType() == long.class) {
                    eventProc = field.getLong(Display.getDefault());
                }
            }
        } catch (Throwable th) {
            //Fail silently
        }
        map.put("javafx.embed.eventProc", eventProc);
    }
    // Note that calling PlatformImpl.startup more than once is OK
    PlatformImpl.startup(() -> {
        Application.GetApplication().setName(Display.getAppName());
    });
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public void start() {
	Log.d(TAG, "start vsync detect");
	if (mRunning) {
		return;
	}
	
	mRunning = true;

	syncCheckThread = new Thread(new Runnable() {
		@Override
		public void run() {
			for (;;) {
				if (!mRunning) {
					break;
				}
				syncCheckThread();
			}
		}
	});
	syncCheckThread.start();
	
	Choreographer chor = Choreographer.getInstance();
	Field field;
	try {
		field = chor.getClass().getDeclaredField("mFrameIntervalNanos");
		field.setAccessible(true);
		mFrameIntervalNanos = field.getLong(chor);
		Log.d(TAG, "mFrameIntervalNanos " + mFrameIntervalNanos);
	} catch (Exception e) {
		Log.e(TAG, "error: " + e.getMessage());
	}
	chor.postFrameCallback(frameCallback);

}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
/**
 * Test fails if it throws any exception.
 *
 * @throws Exception
 */
private void init() throws Exception {

    if (!System.getProperty("os.name").startsWith("Windows")) {
        System.out.println("This is Windows only test.");
        return;
    }

    final Frame frame = new Frame("AWT Frame");
    frame.pack();
    frame.setSize(200, 200);
    FramePeer frame_peer = AWTAccessor.getComponentAccessor()
                                .getPeer(frame);
    Class comp_peer_class
            = Class.forName("sun.awt.windows.WComponentPeer");
    Field hwnd_field = comp_peer_class.getDeclaredField("hwnd");
    hwnd_field.setAccessible(true);
    long hwnd = hwnd_field.getLong(frame_peer);

    Class clazz = Class.forName("sun.awt.windows.WEmbeddedFrame");
    Constructor constructor
            = clazz.getConstructor(new Class[]{long.class});
    final Frame embedded_frame
            = (Frame) constructor.newInstance(new Object[]{
                new Long(hwnd)});;
    final JComboBox<String> combo = new JComboBox<>(new String[]{
        "Item 1", "Item 2"
    });
    combo.setSelectedIndex(1);
    final Panel p = new Panel();
    p.setLayout(new BorderLayout());
    embedded_frame.add(p, BorderLayout.CENTER);
    embedded_frame.validate();
    p.add(combo);
    p.validate();
    frame.setVisible(true);
    Robot robot = new Robot();
    robot.delay(2000);
    Rectangle clos = new Rectangle(
            combo.getLocationOnScreen(), combo.getSize());
    robot.mouseMove(clos.x + clos.width / 2, clos.y + clos.height / 2);
    robot.mousePress(InputEvent.BUTTON1_MASK);
    robot.mouseRelease(InputEvent.BUTTON1_MASK);
    robot.delay(1000);
    if (!combo.isPopupVisible()) {
        throw new RuntimeException("Combobox popup is not visible!");
    }
    robot.mouseMove(clos.x + clos.width / 2, clos.y + clos.height + 3);
    robot.mousePress(InputEvent.BUTTON1_MASK);
    robot.mouseRelease(InputEvent.BUTTON1_MASK);
    robot.delay(1000);
    if (combo.getSelectedIndex() != 0) {
        throw new RuntimeException("Combobox selection has not changed!");
    }
    embedded_frame.remove(p);
    embedded_frame.dispose();
    frame.dispose();

}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
static long getProtocolVersion(Class<? extends VersionedProtocol> protocol)
    throws NoSuchFieldException, IllegalAccessException {
  Field versionField = protocol.getField("VERSION");
  versionField.setAccessible(true);
  return versionField.getLong(protocol);
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
private void createWin() throws IOException, InterruptedException {
    // Don't use shell wrapping on Windows...
    // Mostly this is because exec works not as expected and we cannot
    // control processes started with exec method....

    // Suspend is not supported on Windows.

    final ProcessBuilder pb = new ProcessBuilder(); // NOI18N

    final MacroMap jointEnv = MacroMap.forExecEnv(ExecutionEnvironmentFactory.getLocal());
    jointEnv.putAll(info.getEnvironment());

    if (isInterrupted()) {
        throw new InterruptedException();
    }

    if (info.isUnbuffer()) {
        UnbufferSupport.initUnbuffer(info.getExecutionEnvironment(), jointEnv);
    }

    pb.environment().clear();

    for (Entry<String, String> envEntry : jointEnv.entrySet()) {
        pb.environment().put(envEntry.getKey(), envEntry.getValue());
    }

    pb.redirectErrorStream(info.isRedirectError());
    pb.command(info.getCommand());

    if (LOG.isLoggable(Level.FINEST)) {
        LOG.finest(String.format("Command: %s", info.getCommand())); // NOI18N
    }

    String wdir = info.getWorkingDirectory(true);
    if (wdir != null) {
        File wd = new File(wdir);
        if (!wd.exists()) {
            throw new FileNotFoundException(loc("NativeProcess.noSuchDirectoryError.text", wd.getAbsolutePath())); // NOI18N
        }
        pb.directory(wd);
        if (LOG.isLoggable(Level.FINEST)) {
            LOG.finest(String.format("Working directory: %s", wdir)); // NOI18N
        }
    }

    process = pb.start();

    creation_ts = System.nanoTime();

    errorPipedOutputStream = new PipedOutputStream();
    errorPipedInputStream = new PipedInputStream(errorPipedOutputStream);

    setErrorStream(new SequenceInputStream(process.getErrorStream(), errorPipedInputStream));
    setInputStream(process.getInputStream());
    setOutputStream(process.getOutputStream());

    int newPid = 12345;

    try {
        String className = process.getClass().getName();
        if ("java.lang.Win32Process".equals(className) || "java.lang.ProcessImpl".equals(className)) { // NOI18N
            Field f = process.getClass().getDeclaredField("handle"); // NOI18N
            f.setAccessible(true);
            long phandle = f.getLong(process);

            Win32APISupport kernel = Win32APISupport.instance;
            Win32APISupport.HANDLE handle = new Win32APISupport.HANDLE();
            handle.setPointer(Pointer.createConstant(phandle));
            newPid = kernel.GetProcessId(handle);
        }
    } catch (Throwable e) {
    }

    ByteArrayInputStream bis = new ByteArrayInputStream(("" + newPid).getBytes()); // NOI18N

    readPID(bis);
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
public static Object getField(Object instance, Field field) throws IllegalAccessException {
	if (UNSAFE != null) {
		if (int.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getInt(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (long.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getLong(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (double.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getDouble(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (void.class.equals(field.getType())) {
			return null;
		} else if (float.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getFloat(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (byte.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getByte(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (char.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getChar(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (boolean.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getBoolean(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (short.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getShort(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else {
			return ((sun.misc.Unsafe) UNSAFE).getObject(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		}
	} else { //Fallback if unsafe isn't available
		field.setAccessible(true);
		if (int.class.equals(field.getType())) {
			return field.getInt(instance);
		} else if (long.class.equals(field.getType())) {
			return field.getLong(instance);
		} else if (double.class.equals(field.getType())) {
			return field.getDouble(instance);
		} else if (void.class.equals(field.getType())) {
			return null;
		} else if (float.class.equals(field.getType())) {
			return field.getFloat(instance);
		} else if (byte.class.equals(field.getType())) {
			return field.getByte(instance);
		} else if (char.class.equals(field.getType())) {
			return field.getChar(instance);
		} else if (boolean.class.equals(field.getType())) {
			return field.getBoolean(instance);
		} else if (short.class.equals(field.getType())) {
			return field.getShort(instance);
		} else {
			return field.get(instance);
		}
	}
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
/**
 * An introspection based equality predicate for SIPObjects.
 *@param other the other object to test against.
 */
public boolean equals(Object other) {
    if (!this.getClass().equals(other.getClass()))
        return false;
    SIPObject that = (SIPObject) other;
    Class myclass = this.getClass();
    Class hisclass = other.getClass();
    while (true) {
        Field[] fields = myclass.getDeclaredFields();
        if (!hisclass.equals(myclass))
            return false;
        Field[] hisfields = hisclass.getDeclaredFields();
        for (int i = 0; i < fields.length; i++) {
            Field f = fields[i];
            Field g = hisfields[i];
            // Only print protected and public members.
            int modifier = f.getModifiers();
            if ((modifier & Modifier.PRIVATE) == Modifier.PRIVATE)
                continue;
            Class fieldType = f.getType();
            String fieldName = f.getName();
            if (fieldName.compareTo("stringRepresentation") == 0) {
                continue;
            }
            if (fieldName.compareTo("indentation") == 0) {
                continue;
            }
            try {
                // Primitive fields are printed with type: value
                if (fieldType.isPrimitive()) {
                    String fname = fieldType.toString();
                    if (fname.compareTo("int") == 0) {
                        if (f.getInt(this) != g.getInt(that))
                            return false;
                    } else if (fname.compareTo("short") == 0) {
                        if (f.getShort(this) != g.getShort(that))
                            return false;
                    } else if (fname.compareTo("char") == 0) {
                        if (f.getChar(this) != g.getChar(that))
                            return false;
                    } else if (fname.compareTo("long") == 0) {
                        if (f.getLong(this) != g.getLong(that))
                            return false;
                    } else if (fname.compareTo("boolean") == 0) {
                        if (f.getBoolean(this) != g.getBoolean(that))
                            return false;
                    } else if (fname.compareTo("double") == 0) {
                        if (f.getDouble(this) != g.getDouble(that))
                            return false;
                    } else if (fname.compareTo("float") == 0) {
                        if (f.getFloat(this) != g.getFloat(that))
                            return false;
                    }
                } else if (g.get(that) == f.get(this))
                    continue;
                else if (f.get(this) == null && g.get(that) != null)
                    return false;
                else if (g.get(that) == null && f.get(this) != null)
                    return false;
                else if (!f.get(this).equals(g.get(that)))
                    return false;
            } catch (IllegalAccessException ex1) {
                System.out.println("accessed field " + fieldName);
                System.out.println("modifier  " + modifier);
                System.out.println("modifier.private  " + Modifier.PRIVATE);
                InternalErrorHandler.handleException(ex1);
            }
        }
        if (myclass.equals(SIPObject.class))
            break;
        else {
            myclass = myclass.getSuperclass();
            hisclass = hisclass.getSuperclass();
        }
    }
    return true;
}