TA貢獻1900條經驗 獲得超5個贊
final Node<K,V> getNode(int hash, Object key) {
Node<K,V>[] tab; Node<K,V> first, e; int n; K k;
if ((tab = table) != null && (n = tab.length) > 0 &&
(first = tab[(n - 1) & hash]) != null) {
if (first.hash == hash && //檢查第一個Node是否性相等
((k = first.key) == key || (key != null && key.equals(k))))
return first;
if ((e = first.next) != null) {
if (first instanceof TreeNode)
//紅黑樹中查找
return ((TreeNode<K,V>)first).getTreeNode(hash, key);
do {
//鏈表查找
if (e.hash == hash &&
((k = e.key) == key || (key != null && key.equals(k))))
return e;
} while ((e = e.next) != null);
}
}
return null;
}源碼是通過hash和equals比較返回的
舉報