加锁 同时队列可以无(wú )限(xiàn )长吗 什(shí )么时候(hòu )消减,同时(shí )采(cǎi )用了弱引用避免队(duì )列(liè )过大,造成(chéng )gc压(yā )力 源(yuán )码如(rú )下get recycle scavenge每(měi )次都(dōu )是(shì )从head节点(diǎn )获(huò )取,如(rú )果(guǒ )获(huò )取不到(dào )就next,这些队列并不删除,jvm会自动在内(nèi )存不(bú )够的时候删(shān )除
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