Program Structure

• Source code consists of one or more compilation units (.java files)
• Each compilation unit can contain:
  • a package statement
  • import statements
  • class declarations
  • interface declarations
• Java compiler reads a Java compilation unit and produces one or more binary bytecode files (.class files)
  • Named according to the names of the classes or interfaces in the compilation unit
  • Case is always significant
  • Example: compilation unit MyClass.java containing classes named MyClass and MyList will produce MyClass.class and MyList.class as output files.