How to get variable name? - java

Question

is possible get variable name?

For example:

String nameOfCar = "audi";

Now print the result:

System.out.println(nameOfCar.getVname???or something similar);

Screen:

nameOfCar

In Java, variable names are only available at compile time. They are not available when you run your program. — Code-Apprentice, Jul 12 '14 at 07:00
@KorayTugay Of course it's possible. Reflection is there for a reason. (It's just slow.) — , Jul 12 '14 at 07:01
@TheLostMind Oh, sorry, then it isn't possible. I was thinking that the OP was talking about a field of a class. — , Jul 12 '14 at 07:23
So it is not like Python, variable.__name__. However, if you use mapping structure and store it inside statically, then you can display the variable name. — Ahmet, Jan 08 '19 at 11:27

jmj · Accepted Answer · 2014-07-12T07:06:22.757

11

You can get all field name by reflection

Class yourClass = YourClass.class
Field[] fields = yourClass.getFields();
for(Field f: fields){
    f.getName();
}

or if you want mapping then go for Map

Map<String, String> propertyToValueMap

if you are trying to read method's local variable name, then it is not that simple to fetch also a signal that you are doing something wrong

edited Jul 12 '14 at 07:06

answered Jul 12 '14 at 06:58

jmj

Please say something about method-variables too. – Grim Jul 12 '14 at 07:00
In order to access Private Fields, use 'yourClass.getDeclaredFields()' – adbar Mar 19 '18 at 14:18

score 0 · Answer 2 · answered Jul 12 '14 at 07:01

0

You can do it via reflection

Class  myClass = MyClass.class
Field field = myClass.getField("nameOfCar ");
System.out.println(field .getName());

To get all the fields without using the name you can do

Field[] myFields = myClass .getFields();

answered Jul 12 '14 at 07:01

Aniket Thakur

19

lookup field name by field name to get field name ? – jmj Jul 12 '14 at 07:01
You will get the `Field Object`. As per OP he can use the field name `nameOfCar.getVname`. – Aniket Thakur Jul 12 '14 at 07:02

2 Answers2