java - JDBC hostname error -

i expirencing problem jdbc driver. database @ postgres://... driver works postgresql://.... should do?

i trying connect heroku postgres database java.

code:

connection conn = null; 

below trying postgresql://

class.forname("org.postgresql.driver"); conn = drivermanager.getconnection("jdbc:postgresql://bfjxvagjalvmcu:n9y2vo0myq5sgwvrzjblx59td3@ec2-54-204-15-41.compute-1.amazonaws.com:5432/*****&username=******&password=******&ssl=true"); 

and error:

org.postgresql.util.psqlexception: connection attempt failed. 

and if use code, postgres

class.forname("org.postgresql.driver"); conn = drivermanager.getconnection("jdbc:postgres://bfjxvagjalvmcu:n9y2vo0myq5sgwvrzjblx59td3@ec2-54-204-15-41.compute-1.amazonaws.com:5432/****&username=******&password=****&ssl=true"); 

i error:

java.sql.sqlexception: no suitable driver found jdbc:postgres://bfjxvagjalvmcu:n9y2vo0myq5sgwvrzjblx59td3@ec2-54-204-15-41.compute-1.amazonaws.com:5432/*******&username=********&password=*******&ssl=true