CS 4773 Object Oriented Systems March 30, 2005

• Java Collections
• Editor dated March 30 available - has GUI 2 with limited functionality
• Needed changes to editor design:
  • EditingSession needs the following public methods:
    • public boolean insertLineAfter(int n, String s);
      Inserts the given line after line n.
      All lines after this one are moved down.
      Returns true on success and false on failure.
      Failure occurs when n is not a valid line number (negative for strictly greater than the number of lines) or String does not end in a newline.
    • public boolean insertLineBefore(int n, String s);
      As above, but inserts the line before line n.
    • public boolean removeLine(int n);
      Removes line n if it exists.
      All lines after this are moved up.