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Java Hibernate Basics Getting Started with Hibernate Using the Builder Pattern

Posted by markmneimneh
markmneimneh
14,132 Points

I don't understand why --- Bummer! You haven't properly called the `ConnectionBuilder` constructor.

Hi

What wrong with this code.

We have no argument constructor and I am calling it with no arguments..

In my first attempt to ask the question, I made a typo and the support response did not resolve the original issue.

Thanks

com/teamtreehouse/builder/Connection.java 
package com.teamtreehouse.builder;

public class Connection {
  private String jdbcVendor;
  private String dbName;
  private String username;
  private String password;

  public Connection(String jdbcVendor, String dbName, String username, String password) {
    this.jdbcVendor = jdbcVendor;
    this.dbName = dbName;
    this.username = username;
    this.password = password;
  }

  public Connection(ConnectionBuilder builder) {
    this.jdbcVendor = builder.jdbcVendor;
    this.dbName = builder.dbName;
    this.username = builder.username;
    this.password = builder.password;
  }

  public static class ConnectionBuilder{
    private String jdbcVendor;
    private String dbName;
    private String username;
    private String password;

    public ConnectionBuilder(){}

    public ConnectionBuilder withJdbcVendor(String jdbcVendor) {
      this.jdbcVendor = jdbcVendor;
      return this;
    }

    public ConnectionBuilder withDb(String dbName) {
      this.dbName = dbName;
      return this;
    }

    public ConnectionBuilder withUser(String username, String password) {
      this.username = username;
      this.password = password;
      return this;
    }

    public Connection build() {
      return new Connection(this);
    }
  }
}
Application.java 
import com.teamtreehouse.builder.Connection;
import com.teamtreehouse.builder.Connection.ConnectionBuilder;

public class Application {
  public static void main(String[] args) {
    // TODO: User the builder here instead
    Connection c = new ConnectionConnectionBuilder()
      .withUser("th_user", "mysuperlongpassword")
      .withDb("languages")
      .withJdbcVendor("sqlite")
      .build();
  }
}

1 Answer

Cindy Lea
PLUS
Cindy Lea
Courses Plus Student 6,497 Points
Cindy Lea
Cindy Lea
Courses Plus Student 6,497 Points

You have a typo. It should say ConnectionBuilder() not ConnectionConnectionBuilder() in your Application.java file. So it should look like this:

Connection c = new ConnectionBuilder()