ни equals он не знает, ни contains
package com.javarush.games.minigames.mini12;
import java.util.Objects;
public class Cell {
private int x;
private int y;
public Cell(int x, int y) {
this.x = x;
this.y = y;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Cell cell = (Cell) o;
return x == cell.x && y == cell.y;
}
@Override
public int hashCode() {
return Objects.hash(x, y);
}
}