How to define java array

There are two syntaxes for defining arrays in Java:

Dynamic method (specify the length of the array)

Format: (Recommended learning: java course)

数据类型[] 数组名字 = new 数组存储的数据类型[长度];

[]: Represents an array.

Array name: Give the defined array a variable name that meets the identifier specification. You can use the name to operate the array.

new: keyword, keyword used to create an array.

Data type stored in the array: See what data type the created array is used to store.

[Length]: The length of the array, indicating how many elements can be stored in the array container.

Example:

Define an array container that can store 3 integers. The code is as follows:

int[] arr = new int[3];

Static mode (specify the elements of the array )

Format:

数据类型[] 数组名 = new 数据类型[]{元素1,元素2,元素3...};

Define an array container that stores 1, 2, 3, 4, 5 integers.

int[] arr = new int[]{1,2,3,4,5};

Or omit the format: (You cannot declare first and then assign a value, you can only declare and assign a value at the same time)

数据类型[] 数组名 = {元素1,元素2,元素3...};

Define an array container that stores 1, 2, 3, 4, and 5 integers.

int[] arr = {1,2,3,4,5};

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