...在方法区中,一个类如果要被垃圾收集器回收掉,判断的条件是非常苛刻的,很多人都把方法区称为“永久区”(Permanent Generation),但据说2者在本质上是不一致的,另外还有称呼为“非堆区”,不纠结这个了。
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月亮的暗区是永久背离我们的那一面,我们至多只能看到它的五分之一。
The far side of the Moon is permanently turned away from us and at best we can only ever see one fifth of it.
“(在月球永久性阴暗区的)这些发现是数以万年的历史沉淀下来的,”Schultz说道,“它对探索地球的起源,以及太阳系、银河系的发源都有一定的指导意义。
'There's this archive of billions of years (in the Moon's permanently shadowed craters), ' Schultz said. 'There could be clues there to our Earth's history, our solar system, our galaxy.
程序对堆、非堆、永久保存区(Permanent Generation),以及JVM包含的不同内存池(新生对象区、长期对象区、存活空间等)的内存使用情况
The Memory usage for the applications Heap, Non Heap, Permanent Generation and the different memory pools that the JVM has (new generation, tenured generation, survivor space, etc.)
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