java数组对象初始化分析

power_to_go

于 2023-07-28 08:27:00 发布

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CC 4.0 BY-SA版权

文章标签： java 开发语言

本文链接：https://blog.youkuaiyun.com/power_to_go/article/details/131972367

该代码示例展示了在Java中如何使用字节码操作数组元素。通过aload和astore指令加载和存储变量，bipush用于推送常量，dup复制栈顶元素，iastore将栈顶两个元素进行存储操作。主要关注的是如何在内存栈和数组间移动数据。

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分析代码

    public static void main(String[] args) {
            int a=10,b=20,c=30,d = 40,e = 50,f=60;
            int aa[] = {a,b,c,d,e,f};
            aa[2] = 100;

    }

代码的字节码

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图解分析

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refs

https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-6.html#jvms-6.5.aload
https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-6.html#jvms-6.5.astore
https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-6.html#jvms-6.5.bipush
https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-6.html#jvms-6.5.dup
https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-6.html#jvms-6.5.iastore
https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-6.html#jvms-6.5.iload_n
https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-6.html#jvms-6.5.istore_n