Exception in thread "main" java.lang.IllegalAccessError: tried to access method javassist.ClassPool.<init>()V from class com.zaxxer.hikari.proxy.JavassistProxyFactory

[JohnMerlino1]

I am having an issue with installation. I am using Eclipse. I downloaded the HikariCP-1.3.8.jar and added it to my build path. I noticed it required two dependencies, so I added javassist24.jar to my build path and slf4j-api-1.7.7.jar to my build path. When I tried to compile then, it gave me the error: SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. So I added slf4j-simple.1.7.7.jar to my build path. Now I get the error:

Exception in thread "main" java.lang.IllegalAccessError: tried to access method javassist.ClassPool.()V from class com.zaxxer.hikari.proxy.JavassistProxyFactory
at com.zaxxer.hikari.proxy.JavassistProxyFactory.(JavassistProxyFactory.java:82)
at com.zaxxer.hikari.proxy.JavassistProxyFactory.(JavassistProxyFactory.java:57)
at com.zaxxer.hikari.HikariConfig.(HikariConfig.java:83)
at MyConnectionPool.main(MyConnectionPool.java:16)

And all I am doing is just trying to test a connection:

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.ResultSet;
import java.sql.Statement;

public class MyConnectionPool {

public static void main(String[] args) throws SQLException {
    Statement   stmt = null;  
    ResultSet   rset = null;  
    Connection  conn = null;

    HikariConfig config = new HikariConfig();
    config.setMaximumPoolSize(50);
    config.setDataSourceClassName("org.postgresql.ds.PGSimpleDataSource");
    config.addDataSourceProperty("serverName", "localhost");
    config.addDataSourceProperty("port", "5432");
    config.addDataSourceProperty("databaseName", "mydb");
    config.addDataSourceProperty("user", "myuser");
    config.addDataSourceProperty("password", "mypassword");

    HikariDataSource ds = new HikariDataSource(config);
    try {
        conn = ds.getConnection();
        stmt = conn.createStatement();
        rset = stmt.executeQuery("SELECT * FROM users");
        while (rset.next())  
        {  
            rset.getString(1);
        }
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } finally {
        if (stmt != null)  
        {  
            stmt.close();  
        }  

        if (rset != null)  
        {  
            rset.close();  
        }  

        if (conn != null)  
        {  
            conn.close();  
        }
    }
}

}

The exception occurs here:
HikariConfig config = new HikariConfig();

[JohnMerlino1]

This error went away when I followed the dependencies on this site: https://www.versioneye.com/java/com.zaxxer:HikariCP/1.3.8. I used javassist-3.18.1-GA.jar, slf4j-api-1.7.5.jar and slf4j-simple-1.7.5.jar.