Java Array

学习材料

https://joshhug.gitbooks.io/hug61b/content/chap2/chap24.html

Array Basic

Arrays are a special type of object that consists of a numbered sequence of memory boxes. This is unlike class instances, which have named memory boxes.

Declaration and instantiation

Example

• int x; gives us a 32 bit memory box that stores ints.
• Walrus w1; gives us a 64 bit memory box that stores Walrus references.
• Walrus w2 = new Walrus(30, 5.6); gets us 3 total memory boxes. One 64 bit box that stores Walrus references, one 32 bit box that stores the int size of the Walrus, and a 64 bit box that stores the double tuskSize of the Walrus.

Array Creation

• x = new int[3];
• y = new int[]{1, 2, 3, 4, 5};
• int[] z = {1, 2, 3, 4, 5};