Connecting with Oracle in Java application

I have downloaded Oracle express 11g and installed it Now I want to connect it from a Java application This is my connection code: –

Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:example","example","password123");

But when I try to connect it, it will show me the following exception

java.sql.sqlException: Listener refused the connection with the following error:  
ORA-12505,TNS:listener does not currently kNow of SID given in connect descriptor

at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:419)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:536)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:228)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at javaapplication3.JavaApplication3.main(JavaApplication3.java:40)

However, when I tried to connect to the "Xe" database, it was already connected

Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();   
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","password123");

I don't know why? Please give me some references or tips

Solution

I think you have a misunderstanding between database schema and database type In Oracle, Xe represents Express Edition of Oracle database Orcl means Oracle

In MySQL

DriverManager.getConnection("jdbc:MysqL://localhost:3306/test","password123");

`test` is a database schema.

In Oracle Xe

DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","password123");
DriverManager.getConnection("jdbc:oracle:thin:scott/tiger@myhost:1521:orcl","password123");

`example`: database schema name and DB user name are the same.