WEEK 1 - Java building blocks: data types, expressions and controls

Question 1

How can we run Java programs in the absence of an IDE ?

Answer 1

• The default approach is using the command line user interface
• The command to compile Java source code is javac
• The command to run the Java program is java

Question 2

Compiling and running Java programs outline:

Answer 2

Question 3

Object - orientated programming (oo programming)

Answer 3

• Involves defining classes and then creating objects from those classes
  
  • Objects: Parts that the model is built up form are the objects that appear in the problem domain.
    
    • Represented in a computer program by chunks of computer code.
    • Need to define what information the object will hold (attributes) and what is capable of doing -> Defining a Class​
  • ​​​Class file: Where we write the code to specify the attributes (info to be held) and methods (what objects can do).

Question 4

Problem domain

Answer 4

A problem domain is the area of expertise or application that needs to be examined to solve a problem. A problem domain is simply looking at only the topics you are interested in, and excluding everything else.

Question 5

Structure of Java Code

Answer 5

In Java few rules about the order in which you choose to define the fields and methods within a class

* Important to chose a style and be consistent so it’s easier to read and understand *

Question 6

Main Method

Answer 6

Question 7

Declaring and initialising variables

Answer 7

Question 8

Assigning values to variables

Answer 8