加锁 同时(shí )队(duì )列可(kě )以无限长(zhǎng )吗 什么(me )时(shí )候(hòu )消(xiāo )减,同(tóng )时采用(yòng )了弱引用避免队列过大,造成gc压力(lì ) 源码如(rú )下(xià )get recycle scavenge每(měi )次都是(shì )从(cóng )head节(jiē )点获(huò )取,如果获(huò )取不(bú )到(dào )就next,这些队列并不删除,jvm会(huì )自动在(zài )内存不够的时候删除(chú )
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