Java Utililty Methods Map Create

Map<K, V> map = new HashMap<K, V>();
map.put(key, value);
return map;

Map<K, V> map = new HashMap<K, V>(1);
map.put(key1, value1);
return map;

for (T t : a) {
    Integer coeff = coeffs.get(t);
    if (coeff == null) {
        coeffs.put(t, 1);
    } else {
        coeffs.put(t, coeff + 1);

return buildMap(key, value, null, null, null, null, null, null, null, null, null, null);

HashMap<String, Object> result = new HashMap<String, Object>();
if (data.length % 2 != 0)
    throw new IllegalArgumentException("Odd number of arguments");
String key = null;
Integer step = -1;
for (Object value : data) {
    step++;
    switch (step % 2) {
...

Map<String, String> map = new HashMap<String, String>();
for (int i = 0; i < keysAndValues.length;) {
    map.put(keysAndValues[i], keysAndValues[i + 1]);
    i += 2;
return map;

if (keyValuePairs.length % 2 != 0)
    throw new IllegalArgumentException("keyValuePairs array not dividable by 2 (key + value)");
Map<String, String> map = new HashMap<String, String>();
for (int i = 0; i < keyValuePairs.length; i += 2) {
    map.put(keyValuePairs[i], keyValuePairs[i + 1]);
return map;

return createMap(Collections.EMPTY_MAP);

Map<String, String[]> result = new HashMap<String, String[]>();
result.put("echoResponse", new String[] {});
return Collections.unmodifiableMap(result);

return createMap(INITIAL_CAPACITY);