加锁 同时(shí )队列可以无限(xiàn )长吗 什(shí )么时(shí )候消减,同时采(cǎi )用了(le )弱(ruò )引用(yòng )避(bì )免队(duì )列过(guò )大,造成gc压(yā )力 源(yuán )码如下get recycle scavenge每次都是(shì )从(cóng )head节点(diǎn )获取,如果获(huò )取(qǔ )不(bú )到就next,这些队列并不删除,jvm会自动在内(nèi )存不(bú )够(gòu )的时(shí )候删(shān )除
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