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CS 367 Announcements
Thursday, February 6, 2014
Homework h1 due 10 pm tomorrow, February 7th Homework h2 assigned tomorrow Program p1 due 10 pm Sunday, February 16th
Handin directories have been created. Assignment questions? Post on Piazza or see a TA during lab consulting hours.
Last Time Exceptions
- throwing
- handling
- execution
- practice with exception handling
Today Exceptions
- throws and checked vs. unchecked
- defining Primitive vs. Reference Types
- assignment
- parameter passing ADTs vs. Data Structures Command Line Java Development Submitting Work
Next Time Chains of Linked Nodes
- Listnode class
- practice using
throws clause – Passing the Buck
Checked vs. Unchecked
Java Syntax
... methodName ( parameter list ) throws ExceptionType1, ExceptionType2, ... { ... }
Example
public static void main(String[] args) throws IOException { ...
Primitive vs. Reference Types: Assignment
Primitives
int x, y, z; x = 7; y = x; z = x; y = 10; z = 8;
References
ArrayList x, y, z; x = new ArrayList(); y = x; z = x; y = new ArrayList(); z.add("Madison"); y.add("Wisconsin");
Primitive vs. Reference Types: Parameter Passing
Primitives
Given:
void mod1(int x) { x = 7; }
Execute (assume in main):
int x = 1; int[] y = {1, 2, 3}; mod1(x); mod1(y[2]);
References
Given:
void mod2(int[] x) { x[0] = 7; }
void mod3(int[] x) { x = new int[x.length]; x[0] = 14; }
Execute (assume in main):
int[] a = {1, 2, 3}; mod2(a); mod3(a);
Command Line Java Development
Edit
Compile
Run
