加锁 同时队列可以无限长(zhǎng )吗 什么(me )时候消(xiāo )减,同(tóng )时采用了(le )弱(ruò )引用(yòng )避免队列(liè )过大,造(zào )成(chéng )gc压力 源码如(rú )下get recycle scavenge每次(cì )都(dōu )是从head节(jiē )点获(huò )取,如(rú )果获取不(bú )到就(jiù )next,这些队(duì )列并不删除,jvm会自动在内存不(bú )够(gòu )的时(shí )候删除
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