Catie Welsh January 31,

 Project 1 Due Wednesday  Lab 1 Grades are posted 2

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4  Errors  Strings  Review

 Syntax error - grammatical mistake in your program  Run-time error - error that is detected when your program is run  Logic error - the output of your program is incorrect

UNCisGreat String output = myString.substring(1, 8); 6

 System.out.println(“How do I put \“quotes\” in my string?”); \”Double quote \’Single quote \\Backslash \nNew line \rCarriage return \tTab 7

 System.out.print(“this is a string”);  System.out.println(“this is a string”);  What is the difference? 8

 See p. 90

 Meaningful names  Indenting  Documentation  Defined Constants 10

 public static final Type Variable = Constant;  Named in ALL_CAPS  public class DefinedConstant { public static final double PI = ; public static void main(String[] args) { 11

 Hardware - physical machine ◦ CPU, Memory  Software - programs that give instructions to the computer ◦ Windows XP, Games, Eclipse 12

 Object-Oriented Programming Language ◦ Objects and methods

 “Information hiding”  Putting things in a capsule  Methods in the String class ◦ myString.length();

 “many forms”  Same instruction to mean same thing in different contexts. ◦ Example: “Go play your favorite sport.”  I’d go play lacrosse.  Others of you would play baseball instead.  In programming, this means that the same method name can cause different actions depending on what object it is applied to. 15

 Organizing classes so properties only have to be defined once

 Read 3.1  Project 1 Due  Project 2 Assigned 17