Examples of java.util.EnumMap

java.util.EnumMap
A specialized {@link Map} implementation for use with enum type keys. Allof the keys in an enum map must come from a single enum type that is specified, explicitly or implicitly, when the map is created. Enum maps are represented internally as arrays. This representation is extremely compact and efficient.
Enum maps are maintained in the natural order of their keys (the order in which the enum constants are declared). This is reflected in the iterators returned by the collections views ( {@link #keySet()}, {@link #entrySet()}, and {@link #values()}).
Iterators returned by the collection views are weakly consistent: they will never throw {@link ConcurrentModificationException} and they mayor may not show the effects of any modifications to the map that occur while the iteration is in progress.
Null keys are not permitted. Attempts to insert a null key will throw {@link NullPointerException}. Attempts to test for the presence of a null key or to remove one will, however, function properly. Null values are permitted.
Like most collection implementations EnumMap is not synchronized. If multiple threads access an enum map concurrently, and at least one of the threads modifies the map, it should be synchronized externally. This is typically accomplished by synchronizing on some object that naturally encapsulates the enum map. If no such object exists, the map should be "wrapped" using the {@link Collections#synchronizedMap}method. This is best done at creation time, to prevent accidental unsynchronized access:
```
 Map<EnumKey, V> m = Collections.synchronizedMap(new EnumMap<EnumKey, V>(...)); 
```
Implementation note: All basic operations execute in constant time. They are likely (though not guaranteed) to be faster than their {@link HashMap} counterparts.
This class is a member of the Java Collections Framework. @author Josh Bloch @version 1.16, 04/21/06 @see EnumSet @since 1.5

    return new TreeMap(paramComparator);
  }


  public static EnumMap newEnumMap(Class paramClass)
  {
    return new EnumMap((Class)Preconditions.checkNotNull(paramClass));
  }

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    return new EnumMap((Class)Preconditions.checkNotNull(paramClass));
  }


  public static EnumMap newEnumMap(Map paramMap)
  {
    return new EnumMap(paramMap);
  }

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    return localEnumMultiset;
  }


  private EnumMultiset(Class paramClass)
  {
    super(WellBehavedMap.wrap(new EnumMap(paramClass)));
    this.type = paramClass;
  }

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    throws IOException, ClassNotFoundException
  {
    paramObjectInputStream.defaultReadObject();
    Class localClass = (Class)paramObjectInputStream.readObject();
    this.type = localClass;
    setBackingMap(WellBehavedMap.wrap(new EnumMap(this.type)));
    Serialization.populateMultiset(this, paramObjectInputStream);
  }

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     * @param name A property name.
     * @param values A list of property values.
     */
    public default void property(EnumSet<Vendor> prefixes, String separator, String name, Object... values) {
        if (name != null && name.length() != 0 && values != null) {
            EnumMap<Vendor, List<String>> properties = new EnumMap(Vendor.class);


            // calculate dependent vendors
            EnumSet<Vendor> vendors = EnumSet.copyOf(prefixes);


            for (Object value : values) {
                if (value instanceof CSSValue) {
                    vendors.addAll(((CSSValue) value).vendors());
                }
            }


            for (Vendor vendor : vendors) {
                List<String> text = new ArrayList();


                for (Object value : values) {
                    if (value != null) {
                        if (value instanceof CSSValue) {
                            String vendered = ((CSSValue) value).valueFor(vendor);


                            if (vendered != null && vendered.length() != 0) {
                                text.add(vendered);
                            }
                        } else if (value instanceof Number) {
                            Number number = (Number) value;


                            if (number.intValue() == number.doubleValue()) {
                                text.add(String.valueOf(number.intValue()));
                            } else {
                                text.add(number.toString());
                            }
                        } else {
                            String decoded = value.toString();


                            if (decoded != null && decoded.length() != 0) {
                                text.add(decoded);
                            }
                        }
                    }
                }
                properties.put(vendor, text);
            }


            for (Entry<Vendor, List<String>> property : properties.entrySet()) {
                String value = I.join(separator, property.getValue());


                if (value.length() != 0) {
                    Vendor vendor = property.getKey();

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     * @param name A property name.
     * @param values A list of property values.
     */
    private void property(EnumSet<Vendor> prefixes, String separator, String name, Object... values) {
        if (name != null && name.length() != 0 && values != null) {
            EnumMap<Vendor, List<String>> properties = new EnumMap(Vendor.class);


            // calculate dependent vendors
            EnumSet<Vendor> vendors = EnumSet.copyOf(prefixes);


            for (Object value : values) {
                if (value instanceof CSSValue) {
                    vendors.addAll(((CSSValue) value).vendors());
                }
            }


            for (Vendor vendor : vendors) {
                List<String> text = new ArrayList();


                for (Object value : values) {
                    if (value != null) {
                        if (value instanceof CSSValue) {
                            String vendered = ((CSSValue) value).valueFor(vendor);


                            if (vendered != null && vendered.length() != 0) {
                                text.add(vendered);
                            }
                        } else if (value instanceof Number) {
                            Number number = (Number) value;


                            if (number.intValue() == number.doubleValue()) {
                                text.add(String.valueOf(number.intValue()));
                            } else {
                                text.add(number.toString());
                            }
                        } else {
                            String decoded = value.toString();


                            if (decoded != null && decoded.length() != 0) {
                                text.add(decoded);
                            }
                        }
                    }
                }
                properties.put(vendor, text);
            }


            for (Entry<Vendor, List<String>> property : properties.entrySet()) {
                String value = I.join(separator, property.getValue());


                if (value.length() != 0) {
                    Vendor vendor = property.getKey();

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  // This is legit because enumKeyType above is both an enum type (checked at
  // runtime in the EnumMap ctor) and is the type of a subclass of K.
  @SuppressWarnings({ "rawtypes", "unchecked" })
  private static <K, V>
  Map<K, V> makeEnumMap(Class<? extends Enum> t) { return new EnumMap(t); }

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