加锁 同时队列可以无限长吗 什(shí )么时(shí )候消(xiāo )减,同时(shí )采用(yòng )了弱引用(yòng )避免队(duì )列过大(dà ),造成gc压力 源码如(rú )下get recycle scavenge每次都是(shì )从head节(jiē )点获取(qǔ ),如果获取不(bú )到(dào )就next,这(zhè )些队(duì )列并(bìng )不删除(chú ),jvm会自(zì )动在(zài )内存(cún )不够的时(shí )候删除
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