create table student(id int, name varchar(50), class varchar(10));
insert into student values(1,'Akshay','FYCS'),(2,'Narayan','SYCS');

select * from student;

package embeddeddb;

import java.sql.*;

public class EmbeddedDB
{
    public static void main(String[] args) throws SQLException, ClassNotFoundException
    {
        Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
        Connection con=DriverManager.getConnection("jdbc:derby:myDB","username","password");
        Statement stmt=con.createStatement();

        ResultSet rs=stmt.executeQuery("select NAME from STUDENT where ID=1");
        rs.next();
        System.out.println(rs.getString(1));
    }
}

run:
Exception in thread "main" java.sql.SQLException: Database 'myDB' not found.
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.newSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.handleDBNotFound(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.AutoloadedDriver.connect(Unknown Source)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at embeddeddb.EmbeddedDB.main(EmbeddedDB.java:11)
Caused by: ERROR XJ004: Database 'myDB' not found.
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.wrapArgsForTransportAcrossDRDA(Unknown Source)
    ... 14 more
C:UsersDell 7559AppDataLocalNetBeansCache10.0executor-snippetsrun.xml:111: The following error occurred while executing this line:
C:UsersDell 7559AppDataLocalNetBeansCache10.0executor-snippetsrun.xml:94: Java returned: 1
BUILD FAILED (total time: 0 seconds)

Connection con=DriverManager.getConnection("jdbc:derby:myDB","username","password");