Java Utililty Methods Map from Array

List of utility methods to do Map from Array

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Description

The list of methods to do Map from Array are organized into topic(s).

Method

MaptoMap(Object... args)
to Map 
if (args.length % 2 == 1)
    throw new RuntimeException("toMap must be called with an even number of parameters");
HashMap<String, Object> map = new HashMap<String, Object>();
for (int i = 0; i < args.length; i += 2) {
    String key = "" + args[i];
    Object value = args[i + 1];
    map.put(key, value);
return map;
MaptoMap(Object... data)
to Map 
if (data.length % 2 != 0) {
    throw new IllegalArgumentException("data length: " + data.length);
Map map = new HashMap();
for (int i = 0; i < data.length; i += 2) {
    map.put(data[i], data[i + 1]);
return map;
...
MaptoMap(Object... objects)
to Map 
if (objects == null || objects.length % 2 != 0)
    throw new IllegalArgumentException("Illegal arguments provided to construct a map");
Map<K, V> ret = new HashMap<K, V>();
for (int i = 0; i < objects.length; i += 2) {
    ret.put((K) objects[i], (V) objects[i + 1]);
return ret;
MaptoMap(Object... objects)
to Map 
Map map = new HashMap();
for (int i = 0; i < objects.length; i += 2) {
    map.put(objects[i], objects[i + 1]);
return map;
MaptoMap(Object... pairs)
to Map 
Map<K, V> ret = new java.util.HashMap<K, V>();
if (pairs == null || pairs.length == 0)
    return ret;
if (pairs.length % 2 != 0) {
    throw new IllegalArgumentException("Map pairs can not be odd number.");
int len = pairs.length / 2;
for (int i = 0; i < len; i++) {
...
MaptoMap(Object... pairs)
to Map 
Map<K, V> ret = new HashMap<K, V>();
if (pairs == null || pairs.length == 0)
    return ret;
if (pairs.length % 2 != 0) {
    throw new IllegalArgumentException("Map pairs can not be odd number.");
int len = pairs.length / 2;
for (int i = 0; i < len; i++) {
...
MaptoMap(Object[] array)
to Map 
return toMap(array, null);
MaptoMap(Object[] array)

Converts the given array into a java.util.Map . 

if (array == null) {
    return null;
final Map<Object, Object> map = new HashMap<Object, Object>((int) (array.length * 1.5));
for (int i = 0; i < array.length; i++) {
    Object object = array[i];
    if (object instanceof Map.Entry<?, ?>) {
        Map.Entry<?, ?> entry = (Map.Entry<?, ?>) object;
...
MaptoMap(Object[] array, Map map)
to Map 
if (array == null) {
    return (Map) map;
} else {
    if (map == null) {
        map = new HashMap((int) ((double) array.length * 1.5D));
    for (int i = 0; i < array.length; ++i) {
        Object object = array[i];
...
MaptoMap(Object[] keys, Object[] values)
to Map 
if (keys == null || values == null) {
    return EMPTY_MAP;
return toMap(new HashMap(keys.length), keys, values);