There are 8 types of Java packaging types, namely: 1. Byte; 2. Integer; 3. Short; 4. Long; 5. Float; 6. Double; 7. Boolean; 8. Character.
[Related learning recommendations: java basic tutorial]
There are 8 types of Java packaging types, respectively Yes:
The basic types in Java have simple functions and do not have the characteristics of objects. In order to make the basic types have the characteristics of objects, wrapper classes have appeared, and basic type data can be manipulated like objects. .
1. The packaging class corresponding to the basic type
Basic type use using using using -
1. The packaging class corresponding to the basic type ##short withA. Create a wrapper class object:
Integer i = new Integer(4);//Create an Integer object to represent the specified int value.
Integer s = new Integer("8");
//An Integer object is created, representing the int value specified by the String parameter "8".
The commonly used methods of packaging classes are as follows:With basic data types, why do we need packaging types?
1. For example, if a piece of data in the business is judged by ID to exist in the database, the benefits of the packaging class come out. Integer can be used to represent the storage ID to determine whether it is empty. That’s it
3,
3.1 In Java, everything is an object, but the eight basic types are not objects.
3.2 Differences in declaration methods. Basic types do not need to be created through the new keyword, while encapsulated types require the new keyword.
3.4 Differences in initial values. The initial value of the encapsulated type is null, and the initial value of the basic type depends on the specific type. For example, the initial value of the int type is 0, and the boolean type is false;
3.5 Differences in usage: If used in conjunction with collection classes, only packaging types can be used.The above is the detailed content of There are several types of Java packaging. For more information, please follow other related articles on the PHP Chinese website!

The article discusses using Maven and Gradle for Java project management, build automation, and dependency resolution, comparing their approaches and optimization strategies.

The article discusses creating and using custom Java libraries (JAR files) with proper versioning and dependency management, using tools like Maven and Gradle.

The article discusses implementing multi-level caching in Java using Caffeine and Guava Cache to enhance application performance. It covers setup, integration, and performance benefits, along with configuration and eviction policy management best pra

The article discusses using JPA for object-relational mapping with advanced features like caching and lazy loading. It covers setup, entity mapping, and best practices for optimizing performance while highlighting potential pitfalls.[159 characters]

Java's classloading involves loading, linking, and initializing classes using a hierarchical system with Bootstrap, Extension, and Application classloaders. The parent delegation model ensures core classes are loaded first, affecting custom class loa


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Chinese version
Chinese version, very easy to use

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment