Web Reference: So how is Java initializing my array by default? Is it safe to assume that the default initialization is setting the array indices to 0 which would mean I don't have to loop through the array and initialize it? An array is a data structure that allows us to store and manipulate a collection of elements of the same data type. Arrays have a fixed size, determined during initialization, that cannot be altered during runtime. In this tutorial, we’ll see how to declare an array. Also, we’ll examine the different ways we can initialize an array and the subtle d... Mar 13, 2026 · Memory for arrays is always allocated on the heap in Java. The elements in the array allocated by new will automatically be initialized to zero (for numeric types), false (for boolean) or null (for reference types).
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