Example usage for java.util Map keySet

Introduction

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

Prototype

Set<K> keySet();

Source Link

Document

Returns a Set view of the keys contained in this map.

Usage

From source file:Main.java

/**
 * Delete all the keys with null values of the map received
 * @param map Map<String, Object> map to clean
 *///w  ww  .ja v  a2s  .  c o  m
public static void cleanMapNullValues(Map<String, Object> map) {

    //check map is null
    if (map == null) {
        return;
    }

    for (String key : new ArrayList<>(map.keySet())) {
        if (map.get(key) == null) {
            map.remove(key);
        }
    }

}

From source file:com.garyclayburg.BootVaadin.java

public static void dumpSystemProperties() {
    log.info("system properties dump");
    Properties systemProperties = System.getProperties();
    TreeMap tm = new TreeMap(systemProperties);
    for (Object o : tm.keySet()) {
        String key = (String) o;
        log.info(key + ": " + tm.get(o));
    }/*from  w ww.  ja v a2  s.  c om*/
    Map<String, String> getenv = new TreeMap<>(System.getenv());
    log.info("system environment dump");
    for (String key : getenv.keySet()) {
        log.info("env " + key + ": " + getenv.get(key));
    }
}

From source file:Main.java

/**
 * Returns the string that represents the content of a given style map.
 * @param styleMap Map with the styles values
 * @return string that represents the style.
 *///w w w  .jav  a 2s . co  m
public static String getStyleString(Map<String, Object> styleMap, String asig) {
    String style = "";
    Iterator<Object> it = styleMap.values().iterator();
    Iterator<String> kit = styleMap.keySet().iterator();

    while (kit.hasNext()) {
        String key = kit.next();
        Object value = it.next();
        style = style + key + asig + value + ";";
    }
    return style;
}

From source file:Main.java

public static Bundle mapToBundle(Map<String, Serializable> map) {
    Bundle result = new Bundle();
    if (map == null)
        return result;

    for (String key : map.keySet()) {
        result.putSerializable(key, map.get(key));
    }/*from   w  ww.  j av a  2 s  . c  om*/
    return result;
}

From source file:cn.teamlab.wg.framework.struts2.breadcrumb.Utils.java

@SuppressWarnings("rawtypes")
public static boolean compareParametersMap(Map m1, Map m2) {
    if (m1.size() != m2.size())
        return false;

    for (Object key : m1.keySet()) {
        String[] v1 = (String[]) m1.get(key);
        String[] v2 = (String[]) m2.get(key);

        if (v1.length != v2.length)
            return false;
        // XXX should values be sorted first ?
        // FIXME take care of null values ?
        for (int i = 0; i < v2.length; i++) {
            if (!v1[i].equals(v2[i]))
                return false;
        }//from w ww  .jav  a  2 s  .  c om
    }
    return true;
}

From source file:com.ultrapower.eoms.common.plugin.ecside.common.HTMLOptionsUtil.java

    public static String getOptionsList(Map imap,Object defaultKey ,String otherAttribute){
      StringBuffer rs=new StringBuffer();
      Iterator itor=imap.keySet().iterator();
      //from   www  .ja  va 2s.c o m
      while (itor.hasNext()){
//         String key=(String)itor.next();
//         String value=(String)imap.get(key);
         String key=String.valueOf(itor.next()); 
         
         String value=convertString(imap.get(key),""); 
         
         String selected="";
         if (key.equals(defaultKey)){
            selected="selected=\"selected\"";
         }
         otherAttribute=StringUtils.isBlank(otherAttribute)?"":" "+otherAttribute+" ";

         rs.append("<option value=\"").append(key).append("\" ").append(selected).append(otherAttribute).append(" >")
            .append(value).append("</option>\n");
      }
      
      return rs.toString();
   }

From source file:Main.java

public static String map2String(Map<String, String> map) {
    StringBuilder result = new StringBuilder();

    if (map == null || map.size() == 0)
        return "";

    for (String key : map.keySet()) {
        result.append(key).append("=").append(map.get(key)).append("&");
    }//from   w  w  w.  j a  v a2 s  . c o m
    return result.substring(0, result.length() - 1);
}

From source file:Main.java

/**
 * //from www  .  ja  v a  2 s  . c  o m
 * pre: takes a valid resultSet List, a columnName to group by, a valid
 * comparator for the columnName's value<br>
 * post: separates the list into a List of List with each sub-list having the
 * same columnName value sorted by the keyComparator
 * 
 * @param resultSet
 * @param columnName
 * @param keyComparator
 * @return null if resultSet is null
 */
@SuppressWarnings("rawtypes")
public static List<List<Map>> splitSqlList(List<Map> resultSet, String columnName, Comparator keyComparator) {

    if (resultSet == null)
        return null;

    Map<Object, List<Map>> map = sqlMapListToMap(resultSet, columnName);
    Set keys = map.keySet();
    Object[] keyArray = keys.toArray();
    if (keyComparator == null) {
        Arrays.sort(keyArray);
    } else {
        Arrays.sort(keyArray, keyComparator);
    }

    List<List<Map>> rs = new ArrayList<List<Map>>(keyArray.length);
    for (Object key : keyArray) {
        rs.add(map.get(key));
    }
    return rs;
}

From source file:TokenizerUtil.java

public static String convertMapToCSVString(Map<String, String> urlDefaultMap) {
    StringBuffer sb = new StringBuffer();
    Iterator<String> it = urlDefaultMap.keySet().iterator();
    while (it.hasNext()) {
        if (sb.length() > 0) {
            sb.append("|");
        }//ww w  .  java  2  s.com
        String jdbcDriver = it.next();
        String defaultURL = urlDefaultMap.get(jdbcDriver);
        sb.append(jdbcDriver + "|" + defaultURL);
    }
    return sb.toString();
}

From source file:jef.common.Entry.java

public static <K, V> List<Entry<K, V>> fromMap(Map<K, V> map) {
    List<Entry<K, V>> list = new ArrayList<Entry<K, V>>();
    for (K k : map.keySet()) {
        list.add(new Entry<K, V>(k, map.get(k)));
    }//from  w  ww  . j  ava2 s.c  o  m
    return list;
}