How to manage several Explosions Drawing/Happening ?

Newbie & Debugging Questions
#1

Heya.
I kept thinking and thinking and thinking but i still dont know the better way to create a class/method/functions to manage several explosions happening.
I mean the drawing and some kind of ArrayList to control them, also, idk how to create a flag using this class here, to know when the drawing finished…

soo, if anyone could at least tell me what i need to research , i dont want to abuse anyone to give me the answer, but if you can atleast point me to the right direction, i would appreciate a looooot.

Heres the class that im using, i got here from a friend, i think from 65k user?

Anyway, here it is :

package Atlas;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.Animation;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import java.util.ArrayList;

public class Explosions {

    private static final int FRAME_COLS = 8;
    private static final int FRAME_ROWS = 6;
    Animation walkAnimation;
    Texture walkSheet;
    TextureRegion[] walkFrames;
    SpriteBatch spriteBatch;
    TextureRegion currentFrame;
    float stateTime;

    private ArrayList<Explosions> explosionsHappening;
    private int posx,posy;
    private int TEXTURE_WIDTH,TEXTURE_HEIGHT;
    
    public Explosions() {
        explosionsHappening = new ArrayList<>();
        walkSheet = new Texture(Gdx.files.internal("Explosion2spritesheet.png"));

        TextureRegion[][] tmp = TextureRegion.split(walkSheet, walkSheet.getWidth() / FRAME_COLS, walkSheet.getHeight() / FRAME_ROWS);

        walkFrames = new TextureRegion[FRAME_COLS * FRAME_ROWS];
        int index = 0;
        for (int i = 0; i < FRAME_ROWS; i++) {
            for (int j = 0; j < FRAME_COLS; j++) {
                walkFrames[index++] = tmp[i][j];
            }
        }

        walkAnimation = new Animation(0.025f, walkFrames);
        spriteBatch = new SpriteBatch();
        stateTime = 0f;
        
        
        //Width ¨¨ Height
        TEXTURE_WIDTH = (walkSheet.getWidth() / FRAME_COLS);  
        TEXTURE_HEIGHT = (walkSheet.getHeight() / FRAME_ROWS);
        
    }
   
    
    public TextureRegion getCurrentFrame()
    {
        stateTime += Gdx.graphics.getDeltaTime();                  
        currentFrame = walkAnimation.getKeyFrame(stateTime,false);  
        
        return currentFrame;
    }

    public ArrayList<Explosions> getExplosionsHappening() {
        return explosionsHappening;
    }

    public void addExplosionsHappening(Explosions exp,int posX,int posY) {
        exp.posx = posX;
        exp.posy = posY;
        explosionsHappening.add(exp);
        
        System.out.println("Explosion [x] :" + exp.posx);
        System.out.println("Explosion [y] :" + exp.posy);
    }

    public int getPosx() {
        return posx;
    }

    public int getPosy() {
        return posy;
    }

    public int getTEXTURE_WIDTH() 
    {
     return TEXTURE_WIDTH;
    }

    public int getTEXTURE_HEIGHT() 
    {
     return TEXTURE_HEIGHT;
    }
    
    
    
    
    
}