It's in the original post. If you wish everything then here it is:

import java.sql.*;
public class Main {
	public static void main(String[] args) {
		try {
			Class.forName("org.postgresql.Driver");
			Connection con = DriverManager.getConnection(url_removed);
		} catch (SQLException ex) {
			System.out.println(ex.getMessage());
		} catch (ClassNotFoundException ex) {
			System.out.println(ex.getMessage());
		}
	}
}

When I use java Main it throws ClassNotFoundException, as it cannot find class org.postgresql.Driver, meaning I have to tell where it's located (the .jar file), but I don't know how to do that.

It's in the original post. If you wish everything then here it is:

import java.sql.*;
public class Main {
	public static void main(String[] args) {
		try {
			Class.forName("org.postgresql.Driver");
			Connection con = DriverManager.getConnection(url_removed);
		} catch (SQLException ex) {
			System.out.println(ex.getMessage());
		} catch (ClassNotFoundException ex) {
			System.out.println(ex.getMessage());
		}
	}
}

When I use java Main it throws ClassNotFoundException without the .jar, as it cannot find class org.postgresql.Driver, meaning I have to tell where it's located (the .jar file), but I don't know how to do that.

It's in the original post. If you wish everything then here it is:

import java.sql.*;
public class Main {
	public static void main(String[] args) {
		try {
			Class.forName("org.postgresql.Driver");
			Connection con = DriverManager.getConnection(url_removed);
		} catch (SQLException ex) {
			System.out.println(ex.getMessage());
		} catch (ClassNotFoundException ex) {
			System.out.println(ex.getMessage());
		}
	}
}

It throws ClassNotFoundException without the .jar, as it cannot find class org.postgresql.Driver.

It's in the original post. If you wish everything then here it is:

import java.sql.*;
public class Main {
	public static void main(String[] args) {
		try {
			Class.forName("org.postgresql.Driver");
			Connection con = DriverManager.getConnection(url_removed);
		} catch (SQLException ex) {
			System.out.println(ex.getMessage());
		} catch (ClassNotFoundException ex) {
			System.out.println(ex.getMessage());
		}
	}
}

It throws ClassNotFoundException without the .jar, as it cannot find classes.

It's in the original post. If you wish everything then here it is:

import java.sql.*;
public class Main {
    public static void main(String[] args) {
	    try {
		    Class.forName("org.postgresql.Driver");
		    Connection con = DriverManager.getConnection(url_removed);
	    } catch (SQLException ex) {
		    System.out.println(ex.getMessage());
	    } catch (ClassNotFoundException ex) {
		    System.out.println(ex.getMessage());
	    }
    }
}