CODEWITHSUNDEEP
javaderby
Komal Rathi
Komal Rathi

Reputation: 4274

Create derby database, tables using java code

I downloaded derby in C:\ directly and set the DERBY_INSTALL and CLASSPATH variables:

C:\>set DERBY_INSTALL=C:\Apache\db-derby-10.9.1.0-bin
C:\>set CLASSPATH=%DERBY_INSTALL%\lib\derby.jar;%DERBY_INSTALL%\lib\derbytools.jar;.
C:\> cd %DERBY_INSTALL%\bin
C:\db-derby-10.9.1.0-bin\bin>java org.apache.derby.tools.ij
ij version 10.9
ij>

So it shows ij> and I am able to create a database using command line SQL statements. But I have to create the database and its tables using a Java code. So I the source code below but I dont know where to paste it and how to run it. When I pasted it in the db-derby-10.9.1.0-bin>bin folder and tried to run it within that folder using 'java MainClass komaldb C:\' it shows could not find or load main class MainClass. I am not sure where do I have to run the java program from.

Java Source Code:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

public class MainDB {
static Connection conn;

public static void main(String[] args) throws Exception {
if (args.length != 2) {
  System.out.println("Usage: java JavaDBDemo <Name> <Address>");
  System.exit(1);
}
String driver = "org.apache.derby.jdbc.EmbeddedDriver";
String dbName = "AddressBookDB";
String connectionURL = "jdbc:derby:" + dbName + ";create=true";
String createString = "CREATE TABLE ADDRESSBOOKTbl (NAME VARCHAR 32) NOT NULL, 
ADDRESS VARCHAR(50) NOT NULL)";
Class.forName(driver);

conn = DriverManager.getConnection(connectionURL);

Statement stmt = conn.createStatement();
stmt.executeUpdate(createString);

PreparedStatement psInsert = conn
    .prepareStatement("insert into ADDRESSBOOKTbl values (?,?)");

psInsert.setString(1, args[0]);
psInsert.setString(2, args[1]);

psInsert.executeUpdate();

Statement stmt2 = conn.createStatement();
ResultSet rs = stmt2.executeQuery("select * from ADDRESSBOOKTbl");
System.out.println("Addressed present in your Address Book\n\n");
int num = 0;

while (rs.next()) {
  System.out.println(++num + ": Name: " + rs.getString(1) + "\n Address"
      + rs.getString(2));
}
rs.close();
}
}

Upvotes: 2

Views: 13316

Answers (1)

Bryan Pendleton
Bryan Pendleton

Reputation: 16349

It seems like you are just getting started with Java.

Use of Derby assumes that you are already quite comfortable with the basics of Java programming.

I recommend downloading and running some Java tutorials, such as the ones available here: http://docs.oracle.com/javase/tutorial/

After you become more comfortable with writing and running Java programs, you can start to learn about Derby. I recommend downloading the Derby tutorial available here: http://db.apache.org/derby/papers/DerbyTut/index.html

Upvotes: 2

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