Почему не статичный метод работает в статичном java, написал сам, но не понял логики статики и не статики)

 import java.util.Scanner; 
 
public class Main extends TankHealth{ 
	 
	public static void main(String[] args) { 
		 
		Scanner scan = new Scanner(System.in); 
		System.out.println("Введите статус: старт или стоп"); 
		 
        String status = scan.nextLine(); 
         
		if(status.equals("старт")) { 
			System.out.println("Статус: старт, какая скорость?"); 
		    boolean start = true; 
		    boolean soundride = true; 
		    TankHealth health = new TankHealth(); 
		    System.out.println(health.method(scan.nextInt(), "едет\n")); 
		     
		} 
		if(status.equals("стоп")) { 
			System.out.println("Статус: стоим"); 
		    boolean start = false; 
		    boolean soundride = false; 
		} 
		 
	 
} 
} 

 System.out.println(health.method(scan.nextInt(), "едет\n"));  

 public class TankHealth { 
	 
	private static int health = 100; 
	private static int armor = 100; 
	private static int tankstatusspeed = 0; 
	private static int tankmaxspeed = 200; 
	private static int tankminspeed = 10; 
	private static boolean stop; 
	private static String ride; 
	private static boolean ridesound; 
	private static boolean whole; 
	private static boolean broken; 
	 
void Simple() { 
	if (tankstatusspeed > 0 && tankstatusspeed <= tankmaxspeed && tankstatusspeed >= tankminspeed ) { 
		ride = "start"; 
		stop = false; 
		ridesound = true; 
	} 
	if (tankstatusspeed > 0 && tankstatusspeed <= tankmaxspeed && tankstatusspeed < tankminspeed ) { 
		ride = "start"; 
		stop = false; 
		ridesound = false; 
 
	} 
	 
} 
void method(int tankstatusspeed, int tankmaxspeed, int tankminspeed, String ride, boolean stop, boolean ridesound) { 
	this.tankstatusspeed = tankstatusspeed; 
	this.tankmaxspeed = tankmaxspeed; 
	this.tankminspeed= tankminspeed; 
	this.ride = ride; 
	this.stop = stop; 
	this.ridesound = ridesound; 
} 
void method(int tankstatusspeed, String ride, boolean ridesound) { 
	this.tankstatusspeed = tankstatusspeed; 
	this.ride = ride; 
	this.ridesound = ridesound; 
} 
String method(int tankstatusspeed, String ride) { 
	this.tankstatusspeed = tankstatusspeed; 
	this.ride = ride; 
	return ride + tankstatusspeed; 
} 
}