Write a program to execute SQL cursors using CallableStatement.

A cursor is a temporary work area created in the system memory when a SQL statement is executed. A cursor contains information on a select statement and the rows of data accessed by it. This temporary work area is used to store the data retrieved from the database, and manipulate this data. A cursor can hold more than one row, but can process only one row at a time. The set of rows the cursor holds is called the active set.

package com.java2novice.jdbc;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import oracle.jdbc.OracleTypes;

public class MyCursorCallableStmt {

	public static void main(String a[]){
		
		Connection con = null;
		CallableStatement callSt = null;
		ResultSet rs = null;
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
			con = DriverManager.
				getConnection("jdbc:oracle:thin:@<hostname>:<port num>:<DB name>"
					,"user","password");
			callSt = con.prepareCall("{call myCursorExmp(?,?)}");
			callSt.setInt(1,200);
			callSt.registerOutParameter(2, OracleTypes.CURSOR);
			callSt.execute();
			rs = (ResultSet)callSt.getObject(2);
			while(rs.next()){
				System.out.println(rs.getInt(1));
			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally{
			try{
				if(rs != null) rs.close();
				if(callSt != null) callSt.close();
				if(con != null) con.close();
			} catch(Exception ex){}
		}
	}
}