How to declare an array in java

We take a one-dimensional array as an example. The syntax format is:

数组类型[] 数组名

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The declaration method is as follows:

1,

数组类型 [] 数组名 = {em1,em2,em3,…,emN};//声明数组的时候初始化，一共N个元素

For example:

int[] array = {3,5,4,8,12,5};//一共六个元素

2,

数组类型[] 数组名 = new 数组类型[N]//用new关键字声明数组的同时指定数组长度

For example:

String[] str = new String[6]; //数组长度为6，即数组有六个元素

3,

数组类型[] 数组名 = new 数组类型[] {em1,em2,em3,…,emN};//用new关键字声明数组的同时初始化数组

For example:

int[] array = new int[] {2,4,5,6,8,9}; //array数组一共五个元素

Once the array is declared, the length of the array is determined. Each array has a length property, which cannot be changed, but the array elements can be changed.

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