this = this in反编译Java

Question

I tried decompiling a Java application to which I do not have the source code and a strange thing showed up. At the top of the constructor for a class, there is a line that says

this = this

What does this (not this ) mean? Is this just an artifact of the decompilation process? Or is it just some ugly hack? Can this be assigned to something else? If so, what does

this = null

mean?

Answer 1

this is final. You definitely cannot assign it. I'd guess this is a disassembler artifact.

There's some potential goofy-ness with inner classes (which hold this pointers to the outer class), but those lines as written are not valid Java.