Review

Review

1. It is worth starting by reviewing the aspects of Java program structure you have been exposed to in class.
   • Each program is constructed by completing a class definition.
   • A class definition consists of a class header followed by a collection of
     • variable declarations
     • method definitions

     grouped within curly braces.

   • A method definition consists of a method header followed by a list of statements grouped by curly braces.
   • A methods name determines when the statements in the method are preformed. In particular, the following names associate instructions with user actions:
     • onMousePress
     • onMouseRelease
     • onMouseClick
     • onMouseEnter
     • onMouseExit
     • onMouseMove
     • onMouseDrag
     • begin
   • There are (at least) three kinds of statements:
     • constructions (new ... ),
     • method invocations ( canvas.clear() ),
     • assignments ( uptext = ... )

Review