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This article mainly shows you "how to use arrays in Java". The content is simple and clear. I hope it can help you solve your doubts. Let me lead you to study and learn this article "how to use arrays in Java".

1: array description

Arrays are special types in the Java language. They hold a series of objects that can be referenced by an index. In addition, you can define an array of arrays. Here are some examples:

Int i []

Char C []

Float f [] []

2: array operator

In JAVA, an array is allocated by creating an array using the new operator and assigning it to a variable, such as:

Int I [] = new int [10]

The previous example creates an array of 10 integer variables and assigns it to I, and you get the variables I [0], I [1],., I [8], I [9] in numerical order. Note that the subscript starts with the 0 of the first element and subtracts 1 from the number of arrays.

Arrays are used in the same way as variables, each array member can be used where similar variables are used, and Java also supports multi-dimensional arrays.

Char c [] [] = new char [10] [10]

Float f [] [] = new float [5] []

Note that only one-dimensional scale is determined in the second specification. Java requires that at least one-dimensional scale is determined at compile time (that is, in the source code), and the remaining dimensions can be assigned later.

Arrays are mainly used when you have a lot of related data that you want to store together and can simply access them digitally. Arrays are very powerful.

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