[JVM] Newborn area, old area, permanent generation in jvm

I. Introduction

I recently learned JVM, organized and recorded it during the learning process, and shared it with everyone. This article mainly explains the young generation , old generation and permanent generation of the memory area . The following is the text.

**Heap (heap)** is mainly used to store instance objects and arrays of various classes. Java is divided into two areas: the young generation and the old generation. There is also a meaning of permanent generation in java, which will be explained separately at the end.

2. The meaning of generation

In Java, the heap is divided into two different areas: the new generation (Young), the old generation (Old) and the permanent generation (Perm) . The new generation (Young) is divided into three areas&#x