search
HomeJavajavaTutorialWhat is the difference between Java functions and Go language functions?

The main difference between Java and Go language functions is: Creating functions: Java requires explicitly specifying types, while Go has type inference. Number of parameters: Fixed in Java, variable in Go (variable length parameters). Number of return values: Java can only return one, Go can return multiple (tuples). Pass by value and pass by reference: Java passes by value, Go passes by reference by default.

What is the difference between Java functions and Go language functions?

The difference between Java functions and Go language functions

Overview

Java and Go There are differences in the handling of functions between the two programming languages. This article will introduce the main differences between Java functions and Go language functions.

Creating functions

In Java, function declarations use the public static keyword as follows:

public static int sum(int a, int b) {
    return a + b;
}

In In the Go language, function declarations begin with the func keyword, as shown below:

func sum(a, b int) int {
    return a + b
}

Type inference

Java requires explicit The formula specifies the parameter type and return value type. The Go language has a type inference function that can automatically infer types based on parameter values.

func sum(a, b int) int {
    return a + b
}

Number of parameters

The number of parameters of a Java function must be fixed. The number of parameters of Go language functions can be variable, which is called "variable length parameters".

func sum(numbers ...int) int {
    total := 0
    for _, num := range numbers {
        total += num
    }
    return total
}

Number of return values

Java functions can only return one value. Go language functions can return multiple values, called "tuples".

func minMax(numbers ...int) (int, int) {
    min := numbers[0]
    max := numbers[0]
    for _, num := range numbers {
        if num < min {
            min = num
        }
        if num > max {
            max = num
        }
    }
    return min, max
}

Value passing and reference passing

Java functions use value passing, that is, a copy of the parameter value is passed. The Go language function uses reference passing by default, that is, the reference of the parameter is passed.

// Java
public static void changeValue(int value) {
    value = 100;
}
// Go
func changeValue(value *int) {
    *value = 100
}

Practical case

The following is a function that calculates the sum of two numbers, showing the difference between Java and Go language functions:

Java

public static int sum(int a, int b) {
    return a + b;
}

public static void main(String[] args) {
    int result = sum(10, 20);
    System.out.println(result); // 输出:30
}

Go Language

func sum(a, b int) int {
    return a + b
}

func main() {
    result := sum(10, 20)
    println(result) // 输出:30
}

As can be seen from this example, the parameter and return value types of Java functions must be explicitly specified. Go language functions support type inference and variable-length parameters.

The above is the detailed content of What is the difference between Java functions and Go language functions?. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
go语言有没有缩进go语言有没有缩进Dec 01, 2022 pm 06:54 PM

go语言有缩进。在go语言中,缩进直接使用gofmt工具格式化即可(gofmt使用tab进行缩进);gofmt工具会以标准样式的缩进和垂直对齐方式对源代码进行格式化,甚至必要情况下注释也会重新格式化。

go语言为什么叫gogo语言为什么叫goNov 28, 2022 pm 06:19 PM

go语言叫go的原因:想表达这门语言的运行速度、开发速度、学习速度(develop)都像gopher一样快。gopher是一种生活在加拿大的小动物,go的吉祥物就是这个小动物,它的中文名叫做囊地鼠,它们最大的特点就是挖洞速度特别快,当然可能不止是挖洞啦。

一文浅析Golang中的闭包一文浅析Golang中的闭包Nov 21, 2022 pm 08:36 PM

闭包(closure)是一个函数以及其捆绑的周边环境状态(lexical environment,词法环境)的引用的组合。 换而言之,闭包让开发者可以从内部函数访问外部函数的作用域。 闭包会随着函数的创建而被同时创建。

聊聊Golang中的几种常用基本数据类型聊聊Golang中的几种常用基本数据类型Jun 30, 2022 am 11:34 AM

本篇文章带大家了解一下golang 的几种常用的基本数据类型,如整型,浮点型,字符,字符串,布尔型等,并介绍了一些常用的类型转换操作。

一文详解Go中的并发【20 张动图演示】一文详解Go中的并发【20 张动图演示】Sep 08, 2022 am 10:48 AM

Go语言中各种并发模式看起来是怎样的?下面本篇文章就通过20 张动图为你演示 Go 并发,希望对大家有所帮助!

【整理分享】一些GO面试题(附答案解析)【整理分享】一些GO面试题(附答案解析)Oct 25, 2022 am 10:45 AM

本篇文章给大家整理分享一些GO面试题集锦快答,希望对大家有所帮助!

tidb是go语言么tidb是go语言么Dec 02, 2022 pm 06:24 PM

是,TiDB采用go语言编写。TiDB是一个分布式NewSQL数据库;它支持水平弹性扩展、ACID事务、标准SQL、MySQL语法和MySQL协议,具有数据强一致的高可用特性。TiDB架构中的PD储存了集群的元信息,如key在哪个TiKV节点;PD还负责集群的负载均衡以及数据分片等。PD通过内嵌etcd来支持数据分布和容错;PD采用go语言编写。

go语言是否需要编译go语言是否需要编译Dec 01, 2022 pm 07:06 PM

go语言需要编译。Go语言是编译型的静态语言,是一门需要编译才能运行的编程语言,也就说Go语言程序在运行之前需要通过编译器生成二进制机器码(二进制的可执行文件),随后二进制文件才能在目标机器上运行。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment