Java Programming 1

Java is case sensitive

Total, total, and TOTAL are different identifiers

run-time errors

a problem that occurs during a program execution

Reserved words

already have a predefined meaning in the language

hierarchies

classes can e organized into

decomposition

design separate pieces that are responsible for certain parts of the solution

Machine language

each CPU has its own specific machine language

Java Virtual Machine

executes bytecode

Comments

explain the purpose of the program and describe processing steps

compile-time errors

find syntax errors and other basic problems

Java objects

has state (characteristics), behaviors (operations)

syntax rules

how we can put together symbols, reserved words, and identifiers to make a valid program

Language levels

machine, assembly, high-level, fourth-generation

Classes

object is defined by a class, class is a the blueprint of an object, uses methods to define behavior of the object

Inheritance

one class can be used to derive another

semantics

program statement define what that statement means

logical errors

runs, but produces incorrect results, perhaps wrong formula

compiler

software tool which translates source code into a specific target language

White space

spaces, blank lines, and tabs

Programming Language

specifies the words and symbols that we can use to write a program

development environtment

support the development of Java software (JDK, Eclipse, NetBeans, BlueJ, jGrasp)

Identifiers

the "words" in a program

Java compiler

translates Java source code into a special representation called bytecode

problem solving activities

understand the problem, design a solution, consider alternatives and refine the solution, implement the solution, test the solution

Mechanics of developing a program

writing the program, translating the program, investigating and fixing errors