Help with program

Hey guys I am trying to practice some OOP and I keep on getting this error stating "cannot find symbol"

Java Code:

public class Triangle{
   public static void main(String[] args){
      TriangleFeatures A = new TriangleFeatures(2.0);
      //base.getBase(2.0);
      System.out.print("The base of Triangle A is: " + base.getBase() + ".");
        
   }
}

Java Code:

class TriangleFeatures{
   private double base;
   
   TriangleFeatures(){
      base = 0; 
   }
   
   TriangleFeatures(double newBase){
      this.base = newBase;
   }
   
   public double getBase(){
      return base;
   }
   
   public void setBase(double x){
      this.base = base;
   }



}

can someone help me? I receive the error when I try to print out the base of the triangle. (base.getBase())