Because the operation of registers is transparent to Java developers, that is to say, JVMs may not necessarily implement it according to the above method. As long as the results of the execution of Java code are consistent under any circumstances, it can be considered that JVM is reliable and does not necessarily operate the registers in the same way.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Because the operation of registers is transparent to Java developers, that is to say, JVMs may not necessarily implement it according to the above method. As long as the results of the execution of Java code are consistent under any circumstances, it can be considered that JVM is reliable and does not necessarily operate the registers in the same way.