Java Thread: Run method does not read Instance methods

public class Battle extends Thread{
private Object instructor1;
private Object instructor2;


public Battle(Object instructor1, Object instructor2){
this.instructor1 = (Instructor)instructor1;
this.instructor2 = (Instructor)instructor2;
}

public void run(){

 
 
     System.out.print(instructor1.getCurrentHP());//DOES NOT WORK
  //}

}

public static void main(String[] args){
  Instructor instructor1 = new Instructor("Big Omar Latif", 999, 145, 180, 4000);
  Instructor instructor2 = new Instructor("Small Ali Raza", 400, 185, 230, 1200);
  Battle x = new Battle(instructor1, instructor2);
  
  System.out.print(instructor1.getCurrentHP()); //THIS WORKS

  x.start();
  
}


} 

So i have a class where i have defined method, .getCurrentHP() of the instructor when i print it in the main function, it works. But when i print it in the run method, it says symbol not found. whys that? how can i call my method?

The getCurrentHP() method works for objects of type Instructor. So you need to change instructor1 & instructor2 from object to Instructor as shown below

public class Battle extends Thread{
 private Instructor instructor1;
 private Instructor instructor2;


public Battle(Instructor instructor1, Instructor instructor2){
 this.instructor1 = instructor1;
 this.instructor2 = instructor2;
}