Example of com?

I'm sorry, I'm not sure what you mean by "com." Could you please provide more context or clarify your question?

Java Networking:

- `java.net.Socket`
- `java.net.ServerSocket`
- `java.net.DatagramSocket`
- `java.net.MulticastSocket`
- `java.net.InetAddress`

I/O Operations:

- `java.io.File`
- `java.io.FileInputStream`
- `java.io.FileOutputStream`
- `java.io.BufferedReader`
- `java.io.BufferedWriter`

Database Connectivity:

- `java.sql.Connection`
- `java.sql.DriverManager`
- `java.sql.Statement`
- `java.sql.ResultSet`
- `java.sql.PreparedStatement`

Swing Components:

- `javax.swing.JButton`
- `javax.swing.JLabel`
- `javax.swing.JTextField`
- `javax.swing.JFrame`
- `javax.swing.JPanel`

AWT Components:

- `java.awt.Graphics`
- `java.awt.Color`
- `java.awt.Font`
- `java.awt.Rectangle`
- `java.awt.Component`

Utilities:

- `java.util.ArrayList`
- `java.util.HashMap`
- `java.util.List`
- `java.util.Map`
- `java.util.Date`

XML Processing:

- `javax.xml.parsers.DocumentBuilder`
- `javax.xml.parsers.DocumentBuilderFactory`
- `org.w3c.dom.Document`
- `org.w3c.dom.Element`
- `org.w3c.dom.Node`

Concurrency:

- `java.lang.Thread`
- `java.lang.Runnable`
- `java.util.concurrent.ExecutorService`
- `java.util.concurrent.Executors`
- `java.util.concurrent.Future`

Cryptography:

- `java.security.MessageDigest`
- `java.security.KeyFactory`
- `java.security.Cipher`
- `java.security.Signature`
- `java.security.cert.X509Certificate`

Enterprise JavaBeans:

- `javax.ejb.EJB`
- `javax.ejb.Stateless`
- `javax.ejb.Stateful`
- `javax.ejb.SessionContext`
- `javax.ejb.PersistenceContext`