06-from scratch to JavaWeb-storage format of arrays in memory, 06-javaweb-

06-from scratch to JavaWeb-storage format of arrays in memory, 06-javaweb-

Video: Array Memory Analysis

I. JVM memory Division

To learn about the memory storage of arrays, first understand the overall JVM memory division. For details, see section 04JVM memory.

Ii. Storage of arrays in JVM

Suppose we have the following code:

In the code above, we can divide the process of creating an array into three steps:

1. Declare an array of the int type ages int [] ages;

2. initialize the array new int [] {10, 20, 30} in the heap };

3. Assign the address of the initial array to the ages variable.

 

Is the embodiment of int [] ages = new int [] {} in the memory

We can see that the value of ages is actually the address of the array in the heap.

So when you print the array, you will find that the printed Address is not the value in the array.

When you execute ages = new int [] {, 60}
Initializes a new array in the heap.
The array address is assigned to ages.