从 Java 中的自定义对象的二维数组列表访问对象

Question

考虑以下情况。我有 2 个类，如下所示：

public class CustomObject{

  public int a;
  public String xyz;
  public ArrayList<Integer> arrInt;
  public SomeOtherClass objectSOC;

   public CustomObject(){
   //Constructor
        }
  /*Followed by other methods in the class*/

  }

现在还有一个类，我在其中创建了CustomObject的ArrayList[][]，方法如下

public class CustomObjectUtil{

 ArrayList<CustomObject>[][] arrCO = new ArrayList[100][100];

 public CustomObjectUtil(){
 //Assume there is an object of CustomObject class, let's call it ObjectCO, and a method that adds values to the arrCO using arrCO[i][j].add(ObjectCO);

 //Now, here I want to access objects from my 2D ArrayList as
   String stringCO = arrCO[indx][indy].xyz;
   ArrayList<Integer> arrIntCO = arrCO[indx][indy].arrInt;
   SomeOtherClass objectSOC_CO = arrCO[indx][indy].objectSOC;
 // But the above method is not allowed;
      }

 }

我找不到完成此类作业的方法。如果您需要更多信息，请发表评论！

Answer 1

arrCO[indx][indy] 引用的对象是一个 ArrayList

arrCO 是自定义对象列表的二维数组

执行此操作以访问您要访问的内容：

List<CustomObject> customObjList = arrCO[indx][indy];
CustomObject customObj = customObjList.get(0)  // assuming there are elements in this list

现在您可以访问 arrInt 和 objectSOC 了

customObj.arrInt & customObj.objectSOC