import java.sql.*;
class ChangeRootPassword
{
    public static void main(String[] args) 
    {
        try{
            Class.forName("com.mysql.jdbc.Driver");
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
            String sql = "SET PASSWORD FOR 'root'@'localhost' = PASSWORD('admin')";
            Statement stmt = conn.createStatement();
            stmt.executeQuery(sql);
            stmt.close();
            conn.close();
            }
        catch(Exception ex){
            ex.printStackTrace();
            }
    }
}