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99.9%的Java程序员都说不清的问题：JVM中的对象内存布局？
source link: https://juejin.im/post/5ceac2bc5188253382697580
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作者：李瑞杰目前就职于阿里巴巴，资深 JVM 研究人员在 Java 程序中，我们拥有多种新建对象的方式。除了最为常见的 new 语句之外，我们还可以通过反射机制、Object.clone 方法、反序列化以及 Unsafe.allocateInstance 方法
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