一文读懂HashMap和HashTable的区别以及常见面试题(17)_《Java集合详解系列》是我在完成夯实Ja

oldCap >= DEFAULT_INITIAL_CAPACITY) newThr = oldThr << 1; // double threshold
else if (oldThr > 0) // initial capacity was placed in threshold
newCap = oldThr; else { // zero initial threshold signifies using defaults
newCap = DEFAULT_INITIAL_CAPACITY; newThr = (int)(DEFAULT_LOAD_FACTOR * DEFAULT_INITIAL_CAPACITY);
if (newThr == 0) {
float ft = (float)newCap * loadFactor; newThr = (newCap < MAXIMUM_CAPACITY && ft < (float)MAXIMUM_CAPACITY ?
(int)ft : Integer.MAX_VALUE);