CSCE 2013L: Lab 7

1
CSCE 2013L Lab 7

• Overview
• Arrays in Java
• Selection Sort
• Lab Programs
• Average.java
• Sort and average 5 integers entered from the
  keyboard
• AverageDriver.java
• Use your Average class
• CompactDisc.java
• Modify to print out a selection of songs from
  Classics.txt

2
Arrays in Java (Syntax)?

• Unlike C, the (brackets) go behind the type
  name, not the variable name
• Declare like
• int intArray
• Person people
• Allocate new memory for like
• intArray new intsize
• people new Personsize

3
Arrays in Java cont.

• When an array of class types is made, keep in
  mind that the array is initially filled with the
  null value (i.e. the cells aren't pointing to
  anything)?
• Memory for each element still has to be new'ed.
• Like
• peoplepos new Person(name, age)

4
Selection Sort (Descending)?

• Find the highest element in the list and swap it
  with the element at the first position (remember
  to use a temporary variable for the swap)?
• Move to position (n 1) and repeat this process
  (only, of course, (n 1) is where the value
  needs to be swapped)?

5
Lab Submission

• How do I submit my assignment?
• submit csce2013-005 elb02 lab7
• if you are enrolled in the Wednesday session
• submit csce2013-004 elb02 lab7
• if you are enrolled in the Monday session
• The files I require for this lab are
• Average.java, AverageDriver.java, Song.java,
  CompactDisc.java
• Be sure to submit from the src directory of your
  Netbeans project folder