please rewrite this java code into simpler way to write if because i don't understand stuff like"this." etc. I wrote the instruction in capital letter in comments

import java.util. Vector; public class Rewrite { static class cell int x, y: int dis; public cell(int x, int y, int dis) { //PLEASE REWRITE all the "this." because i dont understand it, simplify it into regular viables this.x = x; this.y = y; this.dis = dis; //PLEASE REWRITE THIS ENTIRE VECTOR WITHOUT USING VECTOR BECAUSE I DON'T UNDERSTAND VECTOR Vector q = new Vector(); //PLEASE REWRITE "q.add" into easier version, i dont understand what is it" q.add(new cell(knightPos[0], knightPos[1], 0)); //line 47