while running in Command promt, Error occurs, could not find or load main class DbCheck

Question

I set path for postgresql driver already. But dont know why this error occurs
Help me to solve the problem

 import java.io.IOException;
    import java.io.PrintWriter;
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.ResultSet;
    import java.sql.Statement;
    import java.util.Scanner;

    public class DbCheck {
        public static void main(String[] args) {
            Scanner scan = new Scanner(System.in);
            try {
                Class.forName("org.postgresql.Driver");
                Connection con=DriverManager.getConnection("jdbc:postgresql://localhost:5432/postgres","*","*");
                Statement st=con.createStatement();
                System.out.println("Name: ");
                String name = scan.nextLine();
                String sql= "select * from memberdata where name='" + name +"'";
                ResultSet rs = st.executeQuery(sql);
                if(rs.next()) {
                    System.out.println("Success");
                }
                else {
                    System.out.println("Failure");
                }
                scan.close();
                con.close();
            }catch(Exception e){
                System.out.println("Error: "+e.getMessage());
            }
        }
    }

Error: could not find or load main class DbCheck

is it while compiling or while running? – Maurice Perry Jan 08 '19 at 06:21 — Maurice Perry, Jan 08 '19 at 06:21
Please describe how exactly you are starting the program. – Laurenz Albe Jan 08 '19 at 07:06 — Laurenz Albe, Jan 08 '19 at 07:06

score 0 · Answer 1 · answered Jan 08 '19 at 05:56

0

Error: could not find or load main class DbCheck

This is not related to postgres driver, you might be trying to run program on different location. Please check your path where you have compiled program and .class file. Run class at same location you will get output.

answered Jan 08 '19 at 05:56

Vivek Pakmode

1,016
2
10
22

class file and java file both are in the same directory – Selva Kumar Jan 08 '19 at 06:21
ok so are you running same in that directory? – Vivek Pakmode Jan 08 '19 at 06:22
yes....! while running the program in cmd, it throws error as could not find main class – Selva Kumar Jan 08 '19 at 06:26
@SelvaKumar is that directory in the classpath? (I bet it isn't) – Maurice Perry Jan 08 '19 at 08:05
i corrected it. i forgot to add .; at the end of variable path – Selva Kumar Jan 08 '19 at 08:42

while running in Command promt, Error occurs, could not find or load main class DbCheck

1 Answers1