数组初始化时不能在声明语法

问题描述

我可以这样写：

  ACLASS []数组= {object1，Object2的}
 

我也可以这样写：

  ACLASS []数组=新ACLASS [2];
...
数组[0] = object1;
阵列[1] = Object2的;
 

但我不能写：

  ACLASS []数组;
...
阵列= {object1，Object2的};
 

这是为什么阻止Java的？

我知道如何解决它，但不时会比较简单。

例如：

 公共无效selectedPointsToMove（cpVect坐标）{    如果（标签== NULL）{
        如果（arePointsClose（坐标，点1，10））{
            cpVect [] = tempTab {}点1;
            标签= tempTab;
        }否则如果（arePointsClose（点2，坐标，10））{
            cpVect [] = tempTab {}点2;
            标签= tempTab;
        }其他{
            cpVect [] = tempTab {点1，点2};
            标签= tempTab;
        }
    }
}
 

的这个简单的问题，因为我学会了如何使用数组在Java中发挥已经缠着我。的

解决方案

You'd have to ask the Java designers. There might be some subtle grammatical reason for the restriction. Note that some of the array creation / initialization constructs were not in Java 1.0, and (IIRC) were added in Java 1.1.

But "why" is immaterial ... the restriction is there, and you have to live with it.

You can write this:

AClass[] array;
...
array = new AClass[]{object1, object2};

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