面试题Java重载重写的相关内容

每日一道面试题之在 Java 中，什么时候用重载，什么时候用重写？

什么是重载？重载（Overloading）是指在同一个类中定义多个具有相同的名称但参数列表不同的方法，由于编译器在调用重载方法时，会根据参数的类型和个数选择合适的方法进行调用。因此这些方法即使可以有不同的返回类型，但是不能仅仅通过返回类型的不同来进行重载，重载的目的是为了提供更多的方法选择ÿ...

【面试题精讲】Java重载和重写有什么区别？

1. 什么是重载和重写?重载(Overloading) 是指在同一个类中，可以定义多个方法名相同但参数列表不同的方法。这些方法根据参数的类型、顺序或数量的不同来区分。重写(Overriding) 是指子类重新实现了父类中已有的方法。子类通过继承父类的方法，并对其进行修改或补充。2. 为什么需要重载和...

「大师课」搞定 Java 开发基础

23 课时 |

8714 人已学 |

加入学习

Java Spring Boot 2.6.0开发实战-1024程序员节创造营公益课

5 课时 |

1162 人已学 |

加入学习

Java Web开发-Web应用、Tomcat、HTTP请求与响应

17 课时 |

1440 人已学 |

加入学习

共有2条

< 1 >

跳转至： GO

更新时间 2024-03-07 14:23:29

本页面内关键词为智能算法引擎基于机器学习所生成，如有任何问题，可在页面下方点击"联系我们"与我们沟通。

产品推荐

{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","icon":"","iconImg":"https://img.alicdn.com/tfs/TB1iJox2Br0gK0jSZFnXXbRRXXa-200-200.png","contentLink":"https://www.aliyun.com/product/arms","title":"应用实时监控服务 ARMS","des":"应用实时监控服务ARMS 包含前端监控，应用监控、云拨测等模块，覆盖小程序、APP、网站等客户端及ECS、Serverless、容器等环境，为分布式、微服务应用提供端到端性能监控与全链路追踪诊断， 让运维监控更加高效便捷。","link1":"https://common-buy.aliyun.com/?spm=5176.26849858.J_5253785160.3.3887564cBbVoUd&commodityCode=arms_serverless_public_cn","btn1":"立即开通（每月50GB额度）","link2":"https://common-buy.aliyun.com/?spm=5176.8140086.1280672.buy11.30f2bb91uujI1A&commodityCode=arms_app_bag#/buy","btn2":"资源包购买（旧版计费）","btn3":"帮助文档","link3":"https://help.aliyun.com/zh/arms/application-monitoring/getting-started/overview?spm=a2c4g.11186623.0.0.502edf6bVmoHkw","infoGroup":[{"infoName":"最佳实践","infoContent":{"firstContentLink":"https://www.aliyun.com/activity/middleware/ObservabilityConference2022?spm=5176.26849857.J_5253785160.2.1f4415e9ite0CU","firstContentName":"新老用户限时钜惠","lastContentLink":"https://www.aliyun.com/activity/middleware/observability","lastContentName":"最新实践 & 公开课"}},{"infoName":"相关推荐","infoContent":{"firstContentLink":"https://www.aliyun.com/activity/middleware/Application_monitoring?spm=5176.8140086.J_4084816840.3.1db8be45A6RecL","firstContentName":"应用监控-Java监控","lastContentName":"前端监控-Web应用监控","lastContentLink":"https://www.aliyun.com/activity/middleware/web_monitoring?spm=5176.26849857.J_9938243310.4.640115e9rV41KE"}},{"infoName":"产品入门","infoContent":{"firstContentName":"快速接入","lastContentName":"计费说明","firstContentLink":"https://help.aliyun.com/zh/arms/application-monitoring/getting-started/monitor-java-applications-1/?spm=a2c4g.11186623.0.0.36badf6bscAkU3","lastContentLink":"https://help.aliyun.com/zh/arms/application-monitoring/product-overview/billing-description?spm=a2c4g.11186623.0.0.41ba1a08NHoPA3"}},{"infoName":"相关推荐","infoContent":{"firstContentName":" 云拨测-网络测速","firstContentLink":"https://www.aliyun.com/activity/middleware/website/performance/test?spm=5176.20960838.0.0.6d33305emfVIyC","lastContentLink":"","lastContentName":""}}]}],"card":[],"search":[],"infoCard":[{"bannerUrl":"https://img.alicdn.com/tfs/TB1Xf81a3gP7K4jSZFqXXamhVXa-5169-974.jpg","bannerTitle":"mPaaS 小程序","bannerContent":"源自于支付宝小程序框架，亿级线上业务体量的锤炼，安全性媲美支付宝原生能力。<br>不仅面向自有 App 投放小程序，更可快速构建打包，覆盖支付宝、淘宝、钉钉等应用。","liveButtonName":"查看详情","liveButtonLink":"https://www.aliyun.com/product/mobilepaas/mpaas-miniprogram","contentTitle":"提供即开即用的端上体验","homePageLink":"https://common-buy.aliyun.com/?spm=5176.14673561.J_8751524360.2.56702709BussF3&commodityCode=mpaas_beta#/open","homePageName":"免费试用","linkGroup":[{"linkContent":"发布包大小极致优化，节省流量和存储。"},{"linkContent":"服务迭代不再受发版限制，快速发布，快速迭代。"},{"linkContent":"业务开发效率更加优秀，一次开发，多端运行。"}]}],"title":{"mainTitle":"应用实时监控服务ARMS","subtitle":"","linkUrl":"","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}

{"$env":{"JSON":{}},"$page":{"env":"production"},"$context":{"optioninfo":{"dynamic":"ture","static":"true"},"simplifiedDisplay":"newEdition","newCard":[{"ifIcon":"img","link":"https://img.alicdn.com/tfs/TB1XY8hGYr1gK0jSZFDXXb9yVXa-1740-328.png","icon":"","iconImg":"https://img.alicdn.com/tfs/TB1iJox2Br0gK0jSZFnXXbRRXXa-200-200.png","contentLink":"https://www.aliyun.com/product/arms","title":"应用实时监控服务 ARMS","des":"应用实时监控服务ARMS 包含前端监控，应用监控、云拨测等模块，覆盖小程序、APP、网站等客户端及ECS、Serverless、容器等环境，为分布式、微服务应用提供端到端性能监控与全链路追踪诊断， 让运维监控更加高效便捷。","link1":"https://common-buy.aliyun.com/?spm=5176.26849858.J_5253785160.3.3887564cBbVoUd&commodityCode=arms_serverless_public_cn","btn1":"立即开通（每月50GB额度）","link2":"https://common-buy.aliyun.com/?spm=5176.8140086.1280672.buy11.30f2bb91uujI1A&commodityCode=arms_app_bag#/buy","btn2":"资源包购买（旧版计费）","btn3":"帮助文档","link3":"https://help.aliyun.com/zh/arms/application-monitoring/getting-started/overview?spm=a2c4g.11186623.0.0.502edf6bVmoHkw","infoGroup":[{"infoName":"最佳实践","infoContent":{"firstContentLink":"https://www.aliyun.com/activity/middleware/ObservabilityConference2022?spm=5176.26849857.J_5253785160.2.1f4415e9ite0CU","firstContentName":"新老用户限时钜惠","lastContentLink":"https://www.aliyun.com/activity/middleware/observability","lastContentName":"最新实践 & 公开课"}},{"infoName":"相关推荐","infoContent":{"firstContentLink":"https://www.aliyun.com/activity/middleware/Application_monitoring?spm=5176.8140086.J_4084816840.3.1db8be45A6RecL","firstContentName":"应用监控-Java监控","lastContentName":"前端监控-Web应用监控","lastContentLink":"https://www.aliyun.com/activity/middleware/web_monitoring?spm=5176.26849857.J_9938243310.4.640115e9rV41KE"}},{"infoName":"产品入门","infoContent":{"firstContentName":"快速接入","lastContentName":"计费说明","firstContentLink":"https://help.aliyun.com/zh/arms/application-monitoring/getting-started/monitor-java-applications-1/?spm=a2c4g.11186623.0.0.36badf6bscAkU3","lastContentLink":"https://help.aliyun.com/zh/arms/application-monitoring/product-overview/billing-description?spm=a2c4g.11186623.0.0.41ba1a08NHoPA3"}},{"infoName":"相关推荐","infoContent":{"firstContentName":" 云拨测-网络测速","firstContentLink":"https://www.aliyun.com/activity/middleware/website/performance/test?spm=5176.20960838.0.0.6d33305emfVIyC","lastContentLink":"","lastContentName":""}}]}],"card":[],"search":[],"infoCard":[{"bannerUrl":"https://img.alicdn.com/tfs/TB1Xf81a3gP7K4jSZFqXXamhVXa-5169-974.jpg","bannerTitle":"mPaaS 小程序","bannerContent":"源自于支付宝小程序框架，亿级线上业务体量的锤炼，安全性媲美支付宝原生能力。<br>不仅面向自有 App 投放小程序，更可快速构建打包，覆盖支付宝、淘宝、钉钉等应用。","liveButtonName":"查看详情","liveButtonLink":"https://www.aliyun.com/product/mobilepaas/mpaas-miniprogram","contentTitle":"提供即开即用的端上体验","homePageLink":"https://common-buy.aliyun.com/?spm=5176.14673561.J_8751524360.2.56702709BussF3&commodityCode=mpaas_beta#/open","homePageName":"免费试用","linkGroup":[{"linkContent":"发布包大小极致优化，节省流量和存储。"},{"linkContent":"服务迭代不再受发版限制，快速发布，快速迭代。"},{"linkContent":"业务开发效率更加优秀，一次开发，多端运行。"}]}],"title":{"mainTitle":"应用实时监控服务ARMS","subtitle":"","linkUrl":"","btnText":"查看详情"},"visual":{"topbg":"https://img.alicdn.com/tfs/TB1bQuBIYH1gK0jSZFwXXc7aXXa-3840-740.gif","icon":"","textColor":"dark"},"dataList":[{"summary":"啦啦啦","author":"wuwu","linksUrl":"#"}],"sceneCard":[],"txt":[]}}