无法创建新的连接是sqldeveloepr [英] Cannot create a new connection is sqldeveloepr

问题描述

我是编程新手.我正在学习JAVA，对于DB，我想学习Oracle，因此我从Oracle网站下载了sqldeveloper.这是一个zip文件，因此我无需安装任何东西，只需将其解压缩即可.当我打开sqldeveloper并尝试建立新连接时，它显示错误.

I am new to Programming. I am learning JAVA and for DB i wanted to learn Oracle so I downloaded sqldeveloper from Oracle website. It was a zip file so I didnot have to install anything, simply extracted it. When I open the sqldeveloper and try to make a new connection, it shows error.

测试失败:IO错误:网络适配器无法建立连接.

Test failed: IO Error: The network adapter could not establish the connection.

我不确定要在用户名和密码中输入什么.而且我也不确定是否必须将此连接到jdk或jre或设置数据库的类路径.

I am not sure what to put in username and pwd. and i am also not sure if i have to connect this to jdk or jre or set classpath for database.

有人可以帮助我吗?我也上传了错误的快照.

Can anyone help me?? I have uploaded the snapshot of the error too.

推荐答案

您下载了客户端.

尽管您没有下载服务器组件-实际的数据库.

You did NOT download the server component though - the actual database.

SQL Developer仅允许您使用现有数据库.

SQL Developer just allows you to work with an existing database.

不用担心，您离那并不遥远.您有几种选择.

No worries, you're not that far away. You have several options.

Oracle Database Express Edition(XE)-它是完全免费的.

Oracle Database Express Edition (XE) - it's completely free.

我们还有一个VirtualBox设备，您可以将其用于个人学习，而且完全免费.

We also have a VirtualBox appliance you can use for personal learning purposes, also completely free.

我对此进行了讨论，并给出了

I talk about this and give step by step instructions here.

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