Question

我正在尝试复制int father_state [] []，它是使用另一个Object类的.clone（）方法复制到另一个相同类型的int son_state [] []，当我试图更改值时在son_state中，father_state的值也会改变。

public Node create_node_son(Node father_node, String action, int row, int column){
                 Node new_node= new Nodo();
                 int father_state[][] = father_node.state.clone();
                 int son_state[][] = father_state;
                 int aux;

                 new_node.setState(father_node.state);

                 /*SWAP of states*/
                 aux = new_node.state[father_node.pos_zero_y][nodo_padre.pos_zero_x];
                 new_node.estado[father_node.pos_zero_y][father_node.pos_zero_x]= son_state[row][column];
                 new_node.estado[row][column]=aux;


                 //nuevo_nodo = new Nodo(estado_hijo, columna, renglon, nodo_padre.costo+1, accion, nodo_padre);
                 /*Refresh the data*/
                 new_node.action=action;
                 new_node.cost=nodo_father.costo+1;
                 new_node.father=nodo_father;
                 new_node.pos_zero_x=cloumn;
                 new_node.pos_zero_y=row;

                 return new_node;
             }

Answer 1

更改子状态会导致父状态发生变化，因为两者都指向此处提到的同一对象：

             int son_state[][] = father_state;

你应该克隆父亲的父亲状态，如下所述：

int father_state[][] = father_node.state.clone(); // new clone object
int son_state[][] = father_node.state.clone(); // new clone object

Answer 2

我在另一篇文章中找到答案，我需要另一个复制功能

public static int[][] cloneArray(int[][] src) {
    int length = src.length;
    int[][] target = new int[length][src[0].length];
       for (int i = 0; i < length; i++) {
          System.arraycopy(src[i], 0, target[i], 0, src[i].length);
       }
    return target;
}

使用.clone（）复制属性

2 个答案: