Class review

1
Class review

• Chapter 1
• Computer System (CPU, Main Memory, Secondary
  Memory Devices, Input/Output devices)
• Binary number system
• Appendix B and the required reading
• Java
• Architecture-neutral
• Bytecode
• Compiler
• Programming languages at different levels
• Case sensitive
• Identifier

2
Class review

• Chapter 2 (data expressions)
• Primitive data types
• byte, short, int, long, float, double, char,
  boolean
• Conversion (widening and narrowing)
• Unicode character set
• Expressions
• Assignments and arithmetic operators (, -, , /,
  )
• char b'A'
• System.out.println(b3)
• System.out.printn(b)
• Precedence (, /, gt , -)
• Scanner class

3
Class review

• Chapter 3
• Create an object (new)
• Special treatment for String
• Creation, manipulation
• Object references
• Java standard class library
• Java.lang, java.util,
• Math, String, Random and their methods
• Static methods
• Enumerated types (type-safe, ensuring that
  invalid values will not be used.)
• Wrapper class
• Allows a primitive value to be used as an object.

4
Class review

• Chapter 5
• Boolean expressions
• Equality and relational operators
• Logic operators
• Precedence!
• Conditionals
• if, if-else
• In a nested if statement, an else clause is
  matched to the closest unmatched if.
• switch
• Break, default
• Integral values
• Relative order of characters and strings

5
Class review

• Chapter 5
• Loops
• While, do-while, for
• A while statement will execute the same statement
  until its condition becomes false
• A do statement executes its loop body at least
  once.
• A for statement is usually used when a loop will
  be executed a set number of times
• Nested loops!!!