Patterns in jdk packages

This years last MOD2 task is to find and document at least four (4) different applications of patterns in a java package assigned to you(r group). These package come from the java jdk and are available in source format (in a zip) if you installed the jdk.

Result

You have to hand in a document that describes the application of the patterns found in the package. In this description you fill out the following template:

• Name of the package
• Names of the classes involved in the pattern instance and the roles in the pattern.
• The reason why this is an instance of the pattern you think it is.
• Example code using this pattern, showing its use.<>

Strategy for this task

To fulfil this task you might want to follow this strategy

• Start with reading the package description. Example: java.nio
• From there look for any class hierarchy. In java.nio that would be something below Buffer for instance.
• Look for members of (1) types from this packages in the classes or for (2)types of classes outside the package. Avoid the last one if you can, although you will not always be able to.
• Try to stay bin the documentation (javadoc level) as long as possible, making assumptions on the patterns used and verify that assumption

Packages for investigation.

Each group of four students gets assigned one of the following packages:

1. java.io
2. java.nio
3. java.util.jar
4. java.util.logging
5. java.util.zip
6. java.net
7. javax.net
8. java.rmi
9. java.security
10. javax.crypto
11. java.text

Group assignment will be done at the start of the lab hours.