Analyze the following code and choose the correct answer.int[] arr = new int[5];arr = new int[6];
Question
Analyze the following code and choose the correct answer.
int[] arr = new int[5];
arr = new int[6];
Solution
Code Analysis
-
Understanding the Code
The code initializes an integer array namedarr
with a size of 5. The second line then reassignsarr
to a new integer array with a size of 6. -
Key Concepts
- In Java, arrays are fixed in size once they are created. This means that the length of an array cannot be changed after its initial creation.
- Assigning a new array to the variable
arr
means that the previous array (of size 5) is now a candidate for garbage collection, as there are no references pointing to it.
-
Detailed Explanation
int[] arr = new int[5];
creates an array that can hold 5 integers. Initially, all values in the array are set to 0 by default.arr = new int[6];
creates a new array that can hold 6 integers. This effectively creates an entirely new array in memory, and the referencearr
is updated to point to this new array. The original array of 5 integers is no longer referenced and can be garbage collected.
-
Implications
The original array is lost upon the reassignment, meaning any values that were stored in that 5-sized array cannot be accessed anymore.
Final Summary
The code correctly initializes and reassigns an array, but it effectively loses the reference to the initial 5-element array. The final state will be that arr
references a new array of size 6, while the original array (of size 5) is eligible for garbage collection.
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