pre-knowledge

In short

You can’t print just the name of a variable. However, I can show you a way to print the name of a class variable.

(AKA if you want to print the name of a variable, make it a class variable)

explanation

  1. create a standard main class structure
    package Print;

public class ClassVariable {
	
	void start() {
		
	}

	public static void main(String[] args) {
		new ClassVariable().start();

	}

}
  2. Create a class variable, PUBLIC CLASS VARIABLE!!
    package Print;

public class ClassVariable {

	public String testVar;
	
	void start() {
		
	}

	public static void main(String[] args) {
		new ClassVariable().start();

	}

}
  3. Create an object of your class
    package Print;

public class ClassVariable {
	
	public String testVar;
	
	void start() {
		ClassVariable newObject = new ClassVariable();
	}

	public static void main(String[] args) {
		new ClassVariable().start();

	}

}
  4. Create a Class Object
    package Print;

public class ClassVariable {

	public String testVar;
	
	void start() {
		ClassVariable newObject = new ClassVariable();
		Class newClassObject = newObject.getClass();
	}

	public static void main(String[] args) {
		new ClassVariable().start();

	}

}
  5. import the Field class
  6. If we save the variable in a Field variable we can get information about the variable that we had saved in the class
    package Print;

import java.lang.reflect.Field;

public class ClassVariable {
	
	public String testVar;
	
	void start() {
		ClassVariable newObject = new ClassVariable();
		Class newClassObject = newObject.getClass();
		Field variable = newClassObject.getField("testVar");a
	}

	public static void main(String[] args) {
		new ClassVariable().start();

	}

}
  7. Now you get an error so add the throw declarations to all linked methods or add a try and catch statement
    package Print;

import java.lang.reflect.Field;

public class ClassVariable {
	
	public String testVar;
	
	void start() throws NoSuchFieldException, SecurityException {
		ClassVariable newObject = new ClassVariable();
		Class newClassObject = newObject.getClass();
		Field variable = newClassObject.getField("testVar");
	}

	public static void main(String[] args) throws NoSuchFieldException, SecurityException {
		new ClassVariable().start();

	}

}
  8. Now we just use the class PrintStream to print the name of the variable
    package Print;

import java.lang.reflect.Field;

public class ClassVariable {
	
	public String testVar;
	
	void start() throws NoSuchFieldException, SecurityException {
		ClassVariable newObject = new ClassVariable();
		Class newClassObject = newObject.getClass();
		Field variable = newClassObject.getField("testVar");
		System.out.println("The name of the variable is: " + variable.getName());
	}

	public static void main(String[] args) throws NoSuchFieldException, SecurityException {
		new ClassVariable().start();

	}

}

 

YOU HAVE PRINTED THE NAME OF A VARIABLE!