Example usage for java.lang String getClass

Introduction

In this page you can find the example usage for java.lang String getClass.

Prototype

@HotSpotIntrinsicCandidate
public final native Class<?> getClass();

Source Link

Document

Returns the runtime class of this Object .

Usage

From source file:ClassInfoDemo1.java

public static void main(String[] args) {
    String s = "";

    Class c = s.getClass();
    System.out.println(c.getName());

    c = new ClassInfoDemo1().getClass();
    System.out.println(c.getName());
}

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From source file:Main.java

public static void main(String[] args) {

    String str = "This is from java2s.com";

    Class cls = str.getClass();
    boolean arr = cls.isArray();
    System.out.println(arr);/*from w w w. j av  a 2  s. co  m*/

    Object array = Array.newInstance(int.class, 3);

    Class type = array.getClass();
    if (type.isArray()) {
        Class elementType = type.getComponentType();
        System.out.println("Array of: " + elementType);
        System.out.println("Array size: " + Array.getLength(array));
    }
}

---

From source file:com.glaf.core.util.JsonUtils.java

public static void main(String[] args) throws Exception {
    Map<String, Object> dataMap = new java.util.HashMap<String, Object>();
    dataMap.put("key01", "");
    dataMap.put("key02", 12345);
    dataMap.put("key03", 789.85D);
    dataMap.put("date", new Date());
    Collection<Object> actorIds = new HashSet<Object>();
    actorIds.add("sales01");
    actorIds.add("sales02");
    actorIds.add("sales03");
    actorIds.add("sales04");
    actorIds.add("sales05");
    dataMap.put("actorIds", actorIds.toArray());
    dataMap.put("x_sale_actor_actorIds", actorIds);

    Map<String, Object> xxxMap = new java.util.HashMap<String, Object>();
    xxxMap.put("0", "--------");
    xxxMap.put("1", "?");
    xxxMap.put("2", "");
    xxxMap.put("3", "");

    dataMap.put("trans", xxxMap);

    String str = JsonUtils.encode(dataMap);
    System.out.println(str);//from ww  w .  j a va  2  s .com
    Map<?, ?> p = JsonUtils.decode(str);
    System.out.println(p);
    System.out.println(p.get("date").getClass().getName());

    String xx = "{name:\"trans\",nodeType:\"select\",children:{\"1\":\"?\",\"3\":\"\",\"2\":\"\",\"0\":\"--------\"}}";
    Map<String, Object> xMap = JsonUtils.decode(xx);
    System.out.println(xMap);
    Set<Entry<String, Object>> entrySet = xMap.entrySet();
    for (Entry<String, Object> entry : entrySet) {
        String key = entry.getKey();
        Object value = entry.getValue();
        System.out.println(key + " = " + value);
        System.out.println(key.getClass().getName() + "  " + value.getClass().getName());
        if (value instanceof JSONObject) {
            JSONObject json = (JSONObject) value;
            Iterator<?> iter = json.keySet().iterator();
            while (iter.hasNext()) {
                String kk = (String) iter.next();
                System.out.println(kk + " = " + json.get(kk));
            }
        }
    }
}

---

From source file:net.trust.datacollection.thread.DataCollectionThread.java

public static void main(String arg[]) {
    String a = "111";
    System.out.println(a.getClass().getName());

    //      DataCollectionThread dataCollectionThread = new DataCollectionThread();
    //      String sql = "INSERT INTO INTER_CAR_INFO"+
    //               "        (INTER_CAR_INFO_ID,"+
    //               "         CAR_MARK,"+
    //               "         CARID,"+
    //               "         CAR_GROUP,"+
    //               "         CAR_CLASS,"+
    //               "         CAR_TYPE,"+
    //               "         MOTORID,"+
    //               "         GSM_NUMBER,"+
    //               "         CAR_COLOR,"+
    //               "         COMPANYID,"+
    //               "         INSTALL_TIME,"+
    //               "         CAR_STATUS,"+
    //               "         LICENSE,"+
    //               "         REGIST_AGENT,"+
    //               "         REGIST_TIME,"+
    //               "         ACCIDENT_DATE,"+
    //               "         CAR_MUSTERTIME,"+
    //               "         CAR_MUSTERFLAG,"+
    //               "         LAST_LON,"+
    //               "         LAST_LAT,"+
    //               "         LAST_SPEED,"+
    //               "         LAST_ANGLE,"+
    //               "         LAST_TIME,"+
    //               "         LAST_FLAG,"+
    //               "         TERMINAL_VER,"+
    //               "         TERMINAL_UPDATE_TIME,"+
    //               "         MAX_SPEED,"+
    //               "         INBOUND_LIMIT,"+
    //               "         OUTBOUND_LIMIT,"+
    //               "         TERMINAL_REPORT,"+
    //               "         TERMINAL_REPORT_TIME,"+
    //               "         LAST_LOCATION,"+
    //               "         UPDATE_RECORD_DATE)"+
    //               "      VALUES"+
    //               "        (pb_get_sequences(@in_seq_name:='INTER_CAR_INFO_ID'),"+
    //               "         '::CAR_MARK::',"+
    //               "         ::CARID::,"+
    //               "         ::CAR_GROUP::,"+
    //               "         ::CAR_CLASS::,"+
    //               "         '::CAR_TYPE::',"+
    //               "         '::MOTORID::',"+
    //               "         '::GSM_NUMBER::',"+
    //               "         '::CAR_COLOR::',"+
    //               "         '::COMPANYID::',"+
    //               "         '::INSTALL_TIME::',"+
    //               "         '::CAR_STATUS::',"+
    //               "         '::LICENSE::',"+
    //               "         '::REGIST_AGENT::',"+
    //               "         '::REGIST_TIME::',"+
    //               "         '::ACCIDENT_DATE::',"+
    //               "         '::CAR_MUSTERTIME::',"+
    //               "         '::CAR_MUSTERFLAG::',"+
    //               "         ::LAST_LON::,"+
    //               "         ::LAST_LAT::,"+
    //               "         ::LAST_SPEED::,"+
    //               "         ::LAST_ANGLE::,"+
    //               "         '::LAST_TIME::',"+
    //               "         ::LAST_FLAG::,"+
    //               "         ::TERMINAL_VER::,"+
    //               "         '::TERMINAL_UPDATE_TIME::',"+
    //               "         ::MAX_SPEED::,"+
    //               "         ::INBOUND_LIMIT::,"+
    //               "         ::OUTBOUND_LIMIT::,"+
    //               "         ::TERMINAL_REPORT::,"+
    //               "         '::TERMINAL_REPORT_TIME::',"+
    //               "         '::LAST_LOCATION::',"+
    //               "         NOW())";
    //      List list = dataCollectionThread.createField(sql);
    //      System.out.println(list);
    //      sql = "   UPDATE inter_car_info"+
    //            "   SET CAR_GROUP = ::CAR_GROUP::,"+
    //            "       CAR_CLASS = ::CAR_CLASS::,"+
    //            "       CAR_TYPE = ''::CAR_TYPE::'',"+
    //            "       MOTORID = ''::MOTORID::'',"+
    //            "       GSM_NUMBER = ''::GSM_NUMBER::'',"+
    //            "       CAR_COLOR = ''::CAR_COLOR::'',"+
    //            "       COMPANYID = ''::COMPANYID::'',"+
    //            "       INSTALL_TIME = ''::INSTALL_TIME::'',"+
    //            "       CAR_STATUS = ''::CAR_STATUS::'',"+
    //            "       LICENSE = ''::LICENSE::'',"+
    //            "       REGIST_AGENT = ''::REGIST_AGENT::'',"+
    //            "       REGIST_TIME = ''::REGIST_TIME::'',"+
    //            "       ACCIDENT_DATE = ''::ACCIDENT_DATE::'',"+
    //            "       CAR_MUSTERTIME = ''::CAR_MUSTERTIME::'',"+
    //            "       CAR_MUSTERFLAG = ''::CAR_MUSTERFLAG::'',"+
    //            "       LAST_LON = ::LAST_LON::,"+
    //            "       LAST_LAT = ::LAST_LAT::,"+
    //            "       LAST_SPEED = ::LAST_SPEED::,"+
    //            "       LAST_ANGLE = ::LAST_ANGLE::,"+
    //            "       LAST_TIME = ''::LAST_TIME::'',"+
    //            "       LAST_FLAG = ::LAST_FLAG::,"+
    //            "       TERMINAL_VER = ::TERMINAL_VER::,"+
    //            "       TERMINAL_UPDATE_TIME = ''::TERMINAL_UPDATE_TIME::'',"+
    //            "       MAX_SPEED = ::MAX_SPEED::,"+
    //            "       INBOUND_LIMIT = ::INBOUND_LIMIT::,"+
    //            "       OUTBOUND_LIMIT = ::OUTBOUND_LIMIT::,"+
    //            "       TERMINAL_REPORT = ::TERMINAL_REPORT::,"+
    //            "       TERMINAL_REPORT_TIME = ''::TERMINAL_REPORT_TIME::'',"+
    //            "       LAST_LOCATION = ''::LAST_LOCATION::'',"+
    //            "       UPDATE_RECORD_DATE = NOW()"+
    //            " WHERE CAR_MARK = ''::CAR_MARK::''"+
    //            "   AND CARID = ::CARID::";
    //      list = dataCollectionThread.createField(sql);
    //      System.out.println(list);
}

---

From source file:Main.java

/**
 * @param <T>/*w w  w  . ja va 2 s  .  c  o  m*/
 *           the type we want to convert the XML into
 * @param c
 *           the class of the parameterized type
 * @param xml
 *           the instance XML description
 * @return a deserialization of the XML into an object of type T of class
 *         class <T>
 * @throws javax.xml.bind.JAXBException
 */
@SuppressWarnings("unchecked")
public static <T> T unmarshal(Class<T> c, String xml) throws JAXBException {
    T res;
    if (c == xml.getClass()) {
        res = (T) xml;
    } else {
        JAXBContext ctx = JAXBContext.newInstance(c);
        Unmarshaller marshaller = ctx.createUnmarshaller();
        res = (T) marshaller.unmarshal(new StringReader(xml));
    }
    return res;
}

---

From source file:com.adaptris.core.fs.FsHelper.java

public static FileFilter createFilter(String filterExpression, String filterImpl) throws Exception {
    FileFilter result = null;/*w  w  w.j  av  a  2 s.  co  m*/
    if (isEmpty(filterExpression)) {
        result = new NoOpFileFilter();
    } else {
        Class[] paramTypes = { filterExpression.getClass() };
        Object[] args = { filterExpression };
        Class c = Class.forName(filterImpl);
        Constructor cnst = c.getDeclaredConstructor(paramTypes);
        result = (FileFilter) cnst.newInstance(args);
    }
    return logWarningIfRequired(result);
}

---

From source file:ninja.utils.SwissKnife.java

/**
 * Convert value to class type value./* ww w .java  2  s  . com*/
 * 
 * If something goes wrong it returns null.
 *
 * @param from string value
 * @param to type of the class
 * @return class type value or null if something goes wrong.
 */
public static <T> T convert(String from, Class<T> to) {

    Class<T> toAsNonPrimitiveType;

    if (from == null) {
        return null;
    }

    T t = null;

    toAsNonPrimitiveType = Primitives.wrap(to);

    if (toAsNonPrimitiveType.isAssignableFrom(from.getClass())) {
        return toAsNonPrimitiveType.cast(from);
    }

    Method converter = CONVERTERS.get(toAsNonPrimitiveType.getName());

    if (converter == null) {

        logger.error(
                "No converter found to convert {}. " + "Returning null. " + "You may want to extend the class.",
                toAsNonPrimitiveType);

    } else {

        try {

            t = toAsNonPrimitiveType.cast(converter.invoke(toAsNonPrimitiveType, from));

        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) {

            logger.error("Cannot convert from " + from.getClass().getName() + " to "
                    + toAsNonPrimitiveType.getName() + ". Conversion failed with " + ex.getMessage(), ex);
        }

    }

    return t;

}

---

From source file:org.apache.distributedlog.namespace.NamespaceDriverManager.java

private static void loadInitialDrivers() {
    Set<String> driverList = Sets.newHashSet();
    // add default bookkeeper based driver
    driverList.add(BKNamespaceDriver.class.getName());
    // load drivers from system property
    String driversStr = System.getProperty("distributedlog.namespace.drivers");
    if (null != driversStr) {
        String[] driversArray = StringUtils.split(driversStr, ':');
        for (String driver : driversArray) {
            driverList.add(driver);/*from ww w .j a va  2 s  . c o  m*/
        }
    }
    // initialize the drivers
    for (String driverClsName : driverList) {
        try {
            NamespaceDriver driver = ReflectionUtils.newInstance(driverClsName, NamespaceDriver.class);
            NamespaceDriverInfo driverInfo = new NamespaceDriverInfo(driver.getClass());
            drivers.put(driver.getScheme().toLowerCase(), driverInfo);
        } catch (Exception ex) {
            logger.warn("Failed to load namespace driver {} : ", driverClsName, ex);
        }
    }
}

---

From source file:net.big_oh.common.web.WebUtil.java

/**
 * /*from   w w w  .ja  v  a2  s.co  m*/
 * Calculate an <b>approximation</b> of the memory consumed by the objects
 * stored under each attribute of a user's {@link HttpSession}. The estimate
 * will often be greater than the actual value because of "double counting"
 * objects that appear multiple times in the attribute value's object graph.
 * 
 * @param session
 *            An HttpSession object from any web application.
 * @return An <b>approximation</b> of the memory consumed for each attribute
 *         <b>name</b> in the session.
 */
public static Map<String, Integer> getSessionAttributeNameToApproxSizeInBytesMap(HttpSession session) {

    // Use an IdentityHashMap because we don't want to miss distinct objects
    // that are equivalent according to equals(..) method.
    Map<String, Integer> sessionAttributeNameToApproxSizeInBytesMap = new IdentityHashMap<String, Integer>();

    Enumeration<?> enumeration = session.getAttributeNames();
    while (enumeration.hasMoreElements()) {
        String attributeName = (String) enumeration.nextElement();
        session.getAttribute(attributeName);

        try {
            sessionAttributeNameToApproxSizeInBytesMap.put(attributeName,
                    new Integer(approximateObjectSize(attributeName)));
        } catch (IOException ioe) {
            logger.error("Failed to approximate size of session attribute name: "
                    + attributeName.getClass().getName(), ioe);
            sessionAttributeNameToApproxSizeInBytesMap.put(attributeName, new Integer(0));
        }

    }

    return sessionAttributeNameToApproxSizeInBytesMap;

}

---

From source file:com.yoncabt.ebr.executor.jasper.Convert.java

private static <T> T str2Number(String val, Class<T> valueClass) {
    if (StringUtils.isBlank(val)) {
        return null;
    }//ww  w.j  a  va  2s  .  c  o m
    if (valueClass == Integer.class) {
        return (T) Integer.valueOf(val);
    }
    if (valueClass == Long.class) {
        return (T) Long.valueOf(val);
    }
    if (valueClass == Short.class) {
        return (T) Short.valueOf(val);
    }
    if (valueClass == Double.class) {
        return (T) Double.valueOf(val);
    }
    if (valueClass == BigDecimal.class) {
        return (T) new BigDecimal(val);
    }
    throw new IllegalArgumentException(val.getClass() + "->" + valueClass.getName());
}

---

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