Example usage for java.util Map get

Introduction

In this page you can find the example usage for java.util Map get.

Prototype

V get(Object key);

Source Link

Document

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

Usage

From source file:net.fizzl.redditengine.data.ListMapValue.java

public static List<String> fromInputStream(String json, String name) {
    List<Map<String, String>> listmap = fromString(json);
    List<String> retval = new ArrayList<String>();
    for (Map<String, String> map : listmap) {
        String value = (String) map.get(name);
        retval.add(value);//from w  w  w  . j a v  a  2s.c om
    }
    return retval;
}

From source file:Main.java

@SuppressWarnings({ "unchecked", "rawtypes" })
public static <K, V extends Collection<T>, T> void addToMap(Map<K, V> data, K key, T value,
        Class<? extends Collection> clz) {
    V values = data.get(key);
    if (values == null) {
        try {/*w w  w. j  ava 2 s .c o m*/
            values = (V) clz.newInstance();
        } catch (InstantiationException e) {
            throw new IllegalArgumentException("Failed to create collection class", e);
        } catch (IllegalAccessException e) {
            throw new IllegalArgumentException("Failed to create collection class", e);
        }

        data.put(key, values);
    }

    values.add(value);
}

From source file:Main.java

/** 
 * @see list argument list/*from  w  w  w.jav a 2 s  . c  om*/
 * @return the most occurring element in list; when more elements occur equally
 * often, the earliest occurring element is returned.
 **/
public static <T> T mostOccurringElement(Collection<T> list) {
    Map<T, Integer> map = new HashMap<>();

    for (T t : list) {
        Integer val = map.get(t);
        map.put(t, val == null ? 1 : val + 1);
    }

    Map.Entry<T, Integer> max = null;

    for (Map.Entry<T, Integer> e : map.entrySet()) {
        if (max == null || e.getValue() > max.getValue()) {
            max = e;
        }
    }
    return max == null ? null : max.getKey();
}

From source file:Main.java

public static void decrementLongMap(Map<String, Long> map, String key) {
    if (!map.containsKey(key))
        return;/*from   w ww . j a va2 s  .c om*/
    map.put(key, map.get(key) - 1);
}

From source file:io.apiman.common.config.options.AbstractOptions.java

protected static String getVar(Map<String, String> optionsMap, String varName) {
    if (optionsMap.get(varName) == null || optionsMap.get(varName).isEmpty()) {
        return null;
    }/*  www.ja  va2s.c  o  m*/
    return optionsMap.get(varName);
}

From source file:Main.java

public static List findAll(Map map, List keys) {
    List list = new ArrayList();
    for (Object key : keys) {
        Object value = map.get(key);
        if (value != null) {
            list.add(value);//w ww  . j a  v  a 2  s. c o m
        }
    }
    return list;
}

From source file:cc.linkedme.commons.useragent.OS.java

public static OS fromMap(Map<String, String> m) {
    return new OS(m.get("family"), m.get("major"), m.get("minor"), m.get("patch"), m.get("patch_minor"));
}

From source file:com.griddynamics.genesis.notification.utils.ConfigReaderUtils.java

public static String getRequiredParameter(java.util.Map<String, String> config, String parameterName) {
    String value = config.get(parameterName);
    if (StringUtils.isEmpty(value)) {
        throw new IllegalArgumentException(String.format("'%s' cannot be empty", parameterName));
    }/*from   w w  w .  ja  va  2 s . c  o  m*/
    return value;
}

From source file:Main.java

/** Merge two map counters. */
public static <K> void mergeMapCounters(Map<K, Integer> counter1, Map<K, Integer> counter2) {
    for (K key : counter2.keySet()) {
        increaseMapCounter(counter1, key, counter2.get(key));
    }/*from  www  . j a  va2s . c om*/
}

From source file:com.alibaba.flink.utils.MetricsMonitor.java

public static String monitorJob() {
    StringBuilder sb = new StringBuilder();
    String url = String.format("http://%s:%d/jobs/%s", ip, port, jobId);
    Map json = httpResponse(url);
    String jobName = (String) json.get("name");
    String uptime = Utils.prettyUptime(Utils.getInt(json.get("duration"), 0));
    sb.append("job: ").append(jobName).append(" uptime: ").append(uptime).append("\n");
    List<Map> vertices = (List<Map>) json.get("vertices");
    for (Map v : vertices) {
        String name = (String) v.get("name");
        int duration = (int) v.get("duration");
        Map metrics = (Map) v.get("metrics");
        long recv = Utils.parseLong(metrics.get("read-records"));
        long send = Utils.parseLong(metrics.get("write-records"));
        double recvTps = (recv * 1000.0) / duration;
        double sendTps = (send * 1000.0) / duration;
        sb.append(String.format("[<%s> recv_tps: %.2f, send_tps: %.2f]\n", name, recvTps, sendTps));
    }//from  w  w  w . j  a  v  a  2  s . c  om
    sb.append("---------------------------------------------\n");
    return sb.toString();
}