elk-util-parent/elk-util-collections/src/main/java/org/semanticweb/elk/util/collections/ArrayHashMap.java
private void enlarge() {
		int oldCapacity = keys.length;
		if (oldCapacity == LinearProbing.MAXIMUM_CAPACITY)
			throw new IllegalArgumentException(
					"Map cannot grow beyond capacity: "
							+ LinearProbing.MAXIMUM_CAPACITY);
		K oldKeys[] = keys;
		V oldValues[] = values;
		int newCapacity = oldCapacity << 1;
		@SuppressWarnings("unchecked")
		K newKeys[] = (K[]) new Object[newCapacity];
		@SuppressWarnings("unchecked")
		V newValues[] = (V[]) new Object[newCapacity];
		for (int i = 0; i < oldCapacity; i++) {
			K key = oldKeys[i];
			if (key != null)
				putKeyValue(newKeys, newValues, key, oldValues[i]);
		}
		this.keys = newKeys;
		this.values = newValues;
	}
private void enlarge() {
		int oldCapacity = keys.length;
		if (oldCapacity == LinearProbing.MAXIMUM_CAPACITY)
			throw new IllegalArgumentException(
					"Map cannot grow beyond capacity: "
							+ LinearProbing.MAXIMUM_CAPACITY);
		K oldKeys[] = keys;
		V oldValues[] = values;
		int newCapacity = oldCapacity << 1;
		@SuppressWarnings("unchecked")
		K newKeys[] = (K[]) new Object[newCapacity];
		@SuppressWarnings("unchecked")
		V newValues[] = (V[]) new Object[newCapacity];
		for (int i = 0; i < oldCapacity; i++) {
			K key = oldKeys[i];
			if (key != null)
				putKeyValue(newKeys, newValues, key, oldValues[i]);
		}
		this.keys = newKeys;
		this.values = newValues;
	}
Increasing the capacity of the map