Why Can't I Initialize a Non-Declared Java Array Directly with Curly Braces?

Array Initialization Syntax for Non-Declared Arrays

In Java, initializing arrays presents nuances when the array is not declared simultaneously. While the following syntax is valid:

AClass[] array = {object1, object2};

and this syntax is also acceptable:

AClass[] array = new AClass[2];
...
array[0] = object1;
array[1] = object2;

the following code is not allowed:

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

Reason for the Restriction

The reason for this restriction remains a mystery, possibly due to underlying grammatical reasons. It was not present in Java 1.0 but was introduced in later versions.

Workaround

One workaround is to use this syntax:

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

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