public class Cell {
public int x;
public int y;
public Cell(int x, int y){
this.x = x;
this.y =y;
}
public String toString(){
return +x+","+y;
}
public boolean equals(Object obj){
if(this == obj){
return true;
}
if(obj == null){
return false;
}
if(obj instanceof Cell){
Cell c = (Cell) obj;
return this.x == c.x && this.y == c.y;
}else{
return false;
}
}
原文：http://skieshawk.blog.51cto.com/4683228/1663392