What does the `Stack=1, Locals=1, Args_size=1` Mean in Java Bytecode?

Question

I made a simple class to learn how to read Java byte code. What does the line

Stack=1, Locals=1, Args_size=1

mean in the folloiwng code?

public Demo();
  Code:
   Stack=1, Locals=1, Args_size=1
   0:   aload_0
   1:   invokespecial   #1; //Method java/lang/Object."<init>":()V
   4:   return
  LineNumberTable: 
   line 1: 0

Answer 1

这意味着您有一个参数（要初始化的对象）、一个局部变量（要初始化的对象）和堆栈中最多一个对象（要初始化的对象）