In Java, when is the {a,b,c,…} array shorthand inappropriate, and why?

Question

If you\'re defining a variable, it appears to be perfectly valid to declare/define a variable as follows:

    double[][] output = {{0,0},{1,0}};

Answer 1

One more edge case I found was in the creation of a two dimensional array and initializing the arrays in the two dimensional array

So from Jeffrey's response - https://docs.oracle.com/javase/specs/jls/se7/html/jls-10.html#jls-10.6 - "An array initializer may be specified in a declaration, or as part of an array creation expression", the below code should appear to work because the the array initializer is being used to initialize the array

int[][] grid = new int[3][3];
grid[0] =  {1,1,1};

However this didn't work(compilation error), and I had to rewrite this as

grid[0] =  new int[]{1,1,1};