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Snailclimb merged 1 commit into from
Jan 12, 2019
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修改错别字 #101

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2 changes: 1 addition & 1 deletion Java相关/搞定JVM垃圾回收就是这么简单.md
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Expand Up @@ -236,7 +236,7 @@ JDK1.2以后，Java对引用的概念进行了扩充，将引用分为强引用

### 3.4 分代收集算法

当前虚拟机的垃圾手机都采用分代收集算法，这种算法没有什么新的思想，只是根据对象存活周期的不同将内存分为几块。一般将java堆分为新生代和老年代，这样我们就可以根据各个年代的特点选择合适的垃圾收集算法。
当前虚拟机的垃圾收集都采用分代收集算法，这种算法没有什么新的思想，只是根据对象存活周期的不同将内存分为几块。一般将java堆分为新生代和老年代，这样我们就可以根据各个年代的特点选择合适的垃圾收集算法。

**比如在新生代中，每次收集都会有大量对象死去，所以可以选择复制算法，只需要付出少量对象的复制成本就可以完成每次垃圾收集。而老年代的对象存活几率是比较高的，而且没有额外的空间对它进行分配担保，所以我们必须选择“标记-清除”或“标记-整理”算法进行垃圾收集。**

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