I want to connect my java program to connect with database and retrieve the data.
its compile perfectly but runtime
im getting this Error : Could not find or load main cla
Default port for mysql connections is 3306. So change this line
String url = "jdbc:mysql://localhost:80/";
to this:
String url = "jdbc:mysql://localhost:3306/";
Let's say your Java2Sql
is inside test
package.
And the code you are trying to run is as below.
package test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class Java2Sql {
public static void main(String args[]) {
Connection connection = null;
try {
Class.forName("com.mysql.jdbc.Driver");
connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/test", "username", "pwd"); // Test DB
System.out.println("Connected.");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
Commands you need to compile and run would be:
javac Java2Sql.java
java -classpath .;test/mysql-connector-java-5.0.4-bin.jar test.Java2Sql
The class named in the manifest Main-class entry doesn't exist in your JAR file, or possibly there is no Main-class: entry in the manifest.
You haven't needed to call Class.forName() for about seven years, and you needs rendered to call newInstance() after that.
You should download Driver from HERE
and JAR file need to add to project class path.
First Right click on you Eclipse Project, Project --> Build Path --> Configure Build Path. Under Libraries tab, click Add Jars or "Add External JARs" and add downloaded jar
Not 100% sure but looks like you are using wrong port number 80. Make sure your MySQL port number is current by below statement
SHOW VARIABLES WHERE Variable_name = 'port';