Java Utililty Methods HashMap Create

return new HashMap<T, S>(0);

Runtime runtime = Runtime.getRuntime();
HashMap<String, Long> params = new HashMap<String, Long>();
params.put("Used", runtime.totalMemory() - runtime.freeMemory());
params.put("Free", runtime.freeMemory());
params.put("Total", runtime.totalMemory());
params.put("Max", runtime.maxMemory());
return params;

return new HashMap<String, String>();

assert (args.length % 2 == 0);
HashMap<K, V> map = new HashMap<>();
for (int i = 0; i < args.length; i += 2) {
    map.put((K) args[i], (V) args[i + 1]);
return map;

HashMap<String, String> map = new HashMap<String, String>();
for (String line : lines) {
    String key = line.split(",")[keyIndex];
    map.put(key, line);
return map;

Map<A, B> value = map.get(key);
if (value == null) {
    value = new HashMap<>();
    map.put(key, (V) value);
return value;

return new HashMap<K, V>();

return new HashMap<K, V>();

return new HashMap<K, V>();

return hashMap(Arrays.asList(entries));