Example usage for java.lang String intern

Introduction

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

Prototype

public native String intern();

Source Link

Document

Returns a canonical representation for the string object.

Usage

From source file:Main.java

public static void main(String[] args) {
    String str1 = "java2s.com";

    String str2 = str1.intern();

    System.out.println(str2);//from  w  w  w .  jav a2s  .  c  o  m

    System.out.println("Is str1 equal to str2 ? = " + (str1 == str2));
}

From source file:Main.java

public static final Set<String> stringArrayToSet(final String[] array) {
    if (array == null) {
        return Collections.emptySet();
    }/*  ww w.  j  av  a 2  s  .  c  om*/
    Set<String> tmp = new LinkedHashSet<>();
    for (String part : array) {
        String trimmed = part.trim();
        if (trimmed.length() > 0) {
            tmp.add(trimmed.intern());
        }
    }
    return tmp;
}

From source file:org.blockartistry.DynSurround.registry.Evaluator.java

@Nonnull
public static Variant eval(@Nonnull final String script) {
    return compile(script.intern()).eval();
}

From source file:org.voltdb.types.QueryType.java

public static QueryType get(String name) {
    QueryType ret = QueryType.name_lookup.get(name.intern());
    return (ret == null ? QueryType.INVALID : ret);
}

From source file:org.protempa.proposition.DataSourceBackendId.java

/**
 * Creates a data source backend id./*from   www .  j  a va  2 s  .  co  m*/
 * 
 * @param id the id {@link String}. Cannot be <code>null</code>.
 * @return a {@link DataSourceBackendId}.
 */
public static DataSourceBackendId getInstance(String id) {
    DataSourceBackendId result = cache.get(id);
    if (result == null) {
        id = id.intern();
        result = new DataSourceBackendId(id);
        cache.put(id, result);
    }
    return result;
}

From source file:net.darkmist.clf.LogEntry.java

private static String internIfNotNull(String str) {
    return (str == null) ? null : str.intern();
}

From source file:com.jiangge.apns4j.impl.ApnsServiceImpl.java

public static IApnsService createInstance(ApnsConfig config) {
    checkConfig(config);/*from  w w w  .ja v a2s  .  com*/
    String name = config.getName();
    IApnsService service = getCachedService(name);
    if (service == null) {
        synchronized (name.intern()) {
            service = getCachedService(name);
            if (service == null) {
                service = new ApnsServiceImpl(config);
                serviceCacheMap.put(name, service);
            }
        }
    }
    return service;
}

From source file:com.dbay.apns4j.impl.ApnsServiceImpl.java

public final static IApnsService createInstance(ApnsConfig config, ErrorProcessHandler errorProcessHandler)
        throws UnrecoverableKeyException, KeyManagementException, KeyStoreException, NoSuchAlgorithmException,
        CertificateException, CertificateExpiredException, IOException {
    checkConfig(config);/*from w  ww  . ja  v a2  s  .  co  m*/
    String name = config.getName();
    IApnsService service = getCachedService(name);
    if (service == null) {
        synchronized (name.intern()) {
            service = getCachedService(name);
            if (service == null) {
                service = new ApnsServiceImpl(config, errorProcessHandler);
                serviceCacheMap.put(name, service);
            }
        }
    }
    return service;
}

From source file:models.service.LoginUserCache.java

/**
 * ?session??<br>/*from w ww. ja v  a2  s .  co  m*/
 * null
 * 
 * @param session Http Session
 * @return null
 */
public static User getBySession(Session session) {
    String uid = UserAuthService.getLoginUid(session);
    if (UserAuthService.isLogin(session)) {
        User user = LoginUserCache.getUser(uid);
        if (null == user) {
            synchronized (uid.intern()) {
                user = LoginUserCache.getUser(uid);
                if (null == user) {
                    user = queryUserByUidWithAutoTrasaction(uid);
                    LOGGER.debug("query login user from db. uid = " + uid);
                    if (null != user) {
                        LoginUserCache.setUser(uid, user);
                    }
                } else {
                    LOGGER.debug("get login user from cache. uid = " + uid);
                }
            }
        } else {
            LOGGER.debug("get login user from cache. uid = " + uid);
        }
        return user;
    }

    return null;
}

From source file:org.kalypsodeegree_impl.io.sax.parser.ContentHandlerUtils.java

/** Get srs from attributes, fallback to default crs */
public static String parseSrsFromAttributes(final Attributes attributes, final String defaultSrs) {
    final String srs = parseStringFromAttributes(attributes, "srsName", defaultSrs);
    if (srs == null)
        return null;

    // BUGFIX/REMARK: preserve memory by intern'ing the srs strings. Especially for bigger gml's this can have a major
    // effect, as every srs string was being kept separately in memory.
    return srs.intern();
}