• Went over examples of basic class definitions in Java--Employee example
• Considered inheritance -- Manager example
• Looked briefly at abstract methods and classes
• Looked briefly at features of the Run-Time Type Identification system
• Considered the problem of making parameterized sorting using subclasses of "sortable"
• Discusses problems with this in terms of objects that already have inherited properties from another class, such as Tile extends Rectangle
• Introduced interfaces to solve this problem and looked at Tile extends Rectangle implements Sortable
• Another example using interfaces, the Timer, also hinted at doing threaded programming
• Introduced exceptions, which are instances of Exception-derived classes
• They use throw, throws, and try/catch blocks
• Looked at how to make applets
• Discussed why cryptography is not a part of Java (most cryptosystems are proprietary, Java is open)
• Pointed out the Swing tutorial link which is also on the main course web page.
• See Java Swing Tutorial

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