加锁 同(tóng )时队(duì )列可以无限(xiàn )长吗 什么时候(hòu )消(xiāo )减,同(tóng )时采用了弱(ruò )引用(yòng )避免队(duì )列(liè )过(guò )大(dà ),造成gc压力 源(yuán )码如下get recycle scavenge每次都(dōu )是从head节点获(huò )取(qǔ ),如果获取(qǔ )不(bú )到(dào )就next,这些队列并不删除,jvm会自(zì )动在内存不够的时(shí )候删除
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