加锁 同(tóng )时队列可(kě )以无限(xiàn )长吗 什么(me )时候消(xiāo )减,同(tóng )时(shí )采用了弱引用避免队(duì )列(liè )过(guò )大,造成gc压力 源码如下(xià )get recycle scavenge每次都(dōu )是(shì )从head节点获(huò )取,如果(guǒ )获(huò )取(qǔ )不到(dào )就next,这些队列并不(bú )删(shān )除,jvm会自动在(zài )内存不(bú )够(gòu )的时候删(shān )除
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