HashMap源碼-擴容resize方法

環境：jdk1.8 resize方法源碼以下： final Node<K,V>[] resize() { Node<K,V>[] oldTab = table; //獲取舊錶的容量值 int oldCap = (oldTab == null) ? 0 : oldTab.length; //獲取舊的閾值 int oldThr = threshold;

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