java.sql.SQLException: Io exception: Got minus one from a read call during JDBC connection with oracle

Question

Hi I am new to java when I tried to connect oracle with my java sample code I got the above exception

My Code is

import java.sql.*;
import java.io.IO         


        

Answer 1

package testing;

import java.sql.DriverManager;
import java.sql.Connection;

import java.sql.SQLException;
import java.sql.*;

public class OracleJDBC {

    public static void main(String[] argv) {

        System.out.println("-------- Oracle JDBC Connection Testing ------");

        try {

            Class.forName("oracle.jdbc.driver.OracleDriver");

        } catch (ClassNotFoundException e) {

            System.out.println("Where is your Oracle JDBC Driver?");
            e.printStackTrace();
            return;

        }

        System.out.println("Oracle driver registered");
        Connection conn=null;

        try {

            conn = DriverManager.getConnection(
                    "jdbc:oracle:thin:@localhost:1521:orclh", "scott",
                    "tiger");

            Statement stmt= conn.createStatement();
            ResultSet r=stmt.executeQuery("Select * from emp");
            while(r.next()){
            String str= r.getString("ename");
            System.out.println (str);
            }

        } catch (SQLException e) {

            System.out.println("Connection Failed! Check output console");
            e.printStackTrace();
            return;

        }
    }
}