How to Fix \'Access denied for user \'root\'@\'localhost\'\' Error when Connecting to MySQL with Java?

Querying a MySQL Database with Java

When trying to establish a connection to a MySQL database using the Java code snippet below:

<code class="java">Class.forName("com.mysql.jdbc.Driver");
Connection m_connection = DriverManager.getConnection("jdbc:mysql://localhost","root","root");</code>

you may encounter the following SQLException:

<code class="java">java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)</code>

This error is typically caused by a lack of proper permissions for the root user. To resolve this issue:

1. Grant Privileges: Use the following query in a command line tool or GUI to grant the root user on localhost all privileges on all databases:

<code class="sql">GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY '%password%' WITH GRANT OPTION;</code>

2. Replace Password Placeholder: Replace %password% with the actual password for the root user.

Once the permissions are granted, you should be able to connect to the database successfully using the specified credentials.

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