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Most people do not understand the knowledge points of this article "how to use java unbounded wildcards", so the editor summarizes the following content, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "java Unbounded wildcard how to use" article.

Description

1. If you are writing a method that can be implemented using the functionality provided in the Object class. Unbounded wildcard types are specified using wildcards.

For example, list

. This is called a list of unknown types.

2. Contemporary codes use methods that do not depend on type parameters in generics.

For example, List.size or List.clear. In fact, many methods of using Class do not depend on T, so Class is often used (Class is so often used because most of the methods in Class do not depend on T.).

Example

Public static void printList (List list) {for (Object elem: list) System.out.println (elem + "); System.out.println ();} what are the basic data types of java? the basic data types of Java are as follows:

1. Integer type, which is used to represent the data type of integer.

2. Floating point type, which is used to represent the data type of decimals.

3. Character type. The keyword of character type is "char".

4. Boolean type, which is the basic data type that represents logical values.

The above is the content of this article on "how to use java unbounded wildcards". I believe we all have some understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please follow the industry information channel.

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