CSCI 335 - Software Development: Exception Handling, Pattern Matching, and Linked Lists - , Study notes of Software Engineering

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CSCI 335 — Software Development

Chain of Responsibility

November 16, 2007

Exception handling

try { Scanner file = new Scanner(new FileInputStream("operations.dat")); while (file.hasNext()) Class.forName(file.nextLine()); } catch (IOException ioe) { System.out.println("Couldn’t find file operations.dat"); System.exit(-1); } catch (ClassNotFoundException cnfe) { System.out.println("Couldn’t load operation " + cnfe.getMessage()); System.exit(-1); }

Linked lists

public class Node {

private int datum; private Node next;

public boolean contains(int item) { if (item == datum) return true; else if (next != null) return next.contains(item); else return false; } }