What is the difference between field, variable and property

It looks like a boring word game , But in fact Java There are descriptions of each item in the glossary .

Reference resources Java Glossary of terms
https://docs.oracle.com/javase/tutorial/information/glossary.html

field

• A data member of a class. Unless specified otherwise, a field is not static.
• Data members of a class . Unless otherwise specified , Otherwise, a field is not static .

property

• Characteristics of an object that users can set, such as the color of a window.
• Users can set the characteristics of objects , Such as the color of the window .

variable

• An item of data named by an identifier. Each variable has a type, such as int or Object, and a scope. See also class variable, instance variable, local variable.
• A data item named by an identifier . Each variable has a type , Such as int or Object, And a range . See class variable 、 Instance variables 、 local variable .

Actually variable not so bad , The other two are easy to confuse .

With Thread Class, for example , look down IntelliJ IDEA in , How does it distinguish field and property Of ：
open Structure After the interface , The menu bar has two function buttons , Can be opened separately field and property：

field and property The front icons are respectively f or p Express . and property There is a small tip that can be opened , Click to find a series of methods or fields below this item . It's basically get、set These methods .

You can see that it is marked property Not all are user modifiable , such as #alive、#getThreads Are all #native Method , User settings are not supported .
and #getStackTrace It's going back to StackTraceElement Array .

Look again Thread Class UML Class diagram ：

Many of them actually coincide .

however idea For reference only . But I also feel that this is unnecessary , The name depends on the context . But when reading official documents , I still have a concept about the difference between the two , At this time, the official description shall prevail .