我有点被困在一个Java项目中。我有这个问题,我不知道如何解决。
基本上,我创建了一个从物体到物体列出它们的机器人。对象不会移动,但是机器人(在我的代码中为代理)会移动。
我使用的一些变量来自FinalProject类,这是我的主要类。
我创建了一个ArrayLists矩阵作为我的世界,我想向它添加对象和代理。他们都从实体类继承。我的问题是,当我将它们添加到矩阵中时,我不知道如何命名它们。这是我的世界课程:
package finalproject;
import java.util.*;
public class World {
protected int cord_x , cord_y , agent_num , object_num , numero_x , numero_y, conta = 1, i = 0;
protected String op, nome;
protected String [] tipos;
public World (int cord_x, int cord_y, int agent_num, int object_num , String op){
this.cord_x = cord_x;
this.cord_y = cord_y;
this.agent_num = agent_num;
this.object_num = object_num;
this.op = op;
ArrayList<Entity>[][] mundo = (ArrayList<Entity>[][])new ArrayList<?>[cord_x][cord_y];
if (op.equals("s")){
gera_agent(agent_num , mundo);
gera_object(object_num, mundo);
}
}
private ArrayList<Entity>[][] gera_agent(int num , ArrayList<Entity>[][] mundo){
String [] cores = {"vermelho", "azul", "verde", "preto"};
String [] formas = {"triangulo", "quadrado", "retangulo", "losango"};
String [] estrategias = {"random", "hamming", "closest"};
i=0;
while (i<num){
int numeroY = new Random().nextInt(cord_x);
int numeroX = new Random().nextInt(cord_y);
int rcores = new Random().nextInt(cores.length);
int rformas = new Random().nextInt(formas.length);
int restrategias = new Random().nextInt(estrategias.length);
String cor = (cores[rcores]);
String forma = (formas[rformas]);
String estrategia = (estrategias[restrategias]);
nome = "Agente" + Integer.toString(conta);
Entity nome = new Agent(nome, cor, forma, numeroX, numeroY, conta, estrategia, FinalProject.raio);
mundo[numeroX][numeroY].add(nome);
conta++;
i++;
}
return mundo;
}
private ArrayList<Entity>[][] gera_object(int num , ArrayList<Entity>[][] mundo){
String [] cores = {"vermelho", "azul", "verde", "preto"};
String [] formas = {"triangulo", "quadrado", "rectangulo", "losango"};
if (FinalProject.op1.equals("planeta")){
tipos = new String[] {"rocha", "alien", "caratera"};
}
else if (FinalProject.op1.equals("catastrofe")){
tipos = new String []{"sobrevivente", "morto", "escombros"};
}
else if (FinalProject.op1.equals("domesticos")){
tipos = new String [] {"mesa", "cadeira", "vassora"};
}
i=0;
while (i<num){
int numeroX = new Random().nextInt(cord_x);
int numeroY = new Random().nextInt(cord_y);
int rcores = new Random().nextInt(cores.length);
int rformas = new Random().nextInt(formas.length);
int rtipo;
rtipo = new Random().nextInt(tipos.length);
String cor = (cores[rcores]);
String forma = (formas[rformas]);
String tipo = (tipos[rtipo]);
nome = "Object" + Integer.toString(conta);
Entity nome = new Object(nome, cor, forma, numeroX, numeroY, conta, estrategia, FinalProject.raio);
mundo[numeroX][numeroY].add(nome);
conta++;
i++;
}
return mundo;
}
基本上当我这样做时:实体nome =新Agent(nome,cor,forma,numeroX,numeroY,conta,estrategia,FinalProject.raio);mundo [numeroX] [numeroY] .add(nome); -这很愚蠢。我是否需要命名要添加到矩阵中的对象?如果可以,该怎么办?
在我的名字的某个点上,我通过以下方式使用一些输入变量来创建世界:
World mundo = new World(W_x , W_y , num_ag , num_ob , op2);
我的实体类:
package finalproject;
import java.util.ArrayList;
public abstract class Entity {
protected String name;
protected String color;
protected String shape;
protected int xCoordenate;
protected int yCoordenate;
protected int id;
public Entity (String name, String color , String shape , int xCoordenate , int yCoordenate , int id){
this.name = name;
this.color = color;
this.shape = shape;
this.xCoordenate = xCoordenate;
this.yCoordenate = yCoordenate;
this.id = id;
}
我认为您的代码中的问题是您没有在使用ArrayList之前对其进行初始化,例如,我在下面的代码段中编写了一个: mundo[i][j] = new ArrayList<Integer>();
int cord_x = 6, cord_y = 5, num = 10;
ArrayList<Integer>[][] mundo = (ArrayList<Integer>[][])
new ArrayList<?>[cord_x][cord_y];
for(int i = 0; i < cord_x; i++){
for(int j = 0; j < cord_y; j++){
//***Instantiate the ArrayList---This is required***
mundo[i][j] = new ArrayList<Integer>();
for(int k = 0; k < num; k++){
// Add the elements in the array list
mundo[i][j].add(new Integer(i+j+k));
}
}
}
//Check the elements
for(int i = 0; i < cord_x; i++){
for(int j = 0; j < cord_y; j++){
for(int k = 0; k < num; k++){
// prints the elements
System.out.println("mundo["+i+"]["+j+"]- place "
+k+" Element == " +mundo[i][j].get(k));
}
}
}
上面的代码片段在第一次迭代中填充了元素,并在第二次迭代中将它们打印为:
mundo[0][0]- place 0 Element == 0
mundo[0][0]- place 1 Element == 1
mundo[0][0]- place 2 Element == 2
mundo[0][0]- place 3 Element == 3
......
我认为您可以在代码中采用两种方法。
mundo[numeroX][numeroY].add(nome);
在行之前添加检查以查看初始化,如下所示
if(mundo[numeroX][numeroY] == null){
mundo[numeroX][numeroY] = new ArrayList<Entity>();
}
在while循环之前,您可以通过如下放置初始化片段来将所有数组列表元素初始化在一起:
for(int i = 0; i < cord_x; i++){
for(int j = 0; j < cord_y; j++){
mundo[i][j] = new ArrayList<Entity>(); // <-- Instantiate the ArrayList
}
}
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