Hardware includes

the tangible parts of computer systems

Software includes

programs

Programs

sets of instructions for the computer to follow

Modern computers have similar components including:

Input devices

Output devices

A processor

Two kinds of memory

Name an input device

Keyboard, Mouse, etc

Name an output device

display screen, printer

What are the two types of computer memory?

Main and auxiliary memory

Bit

A digit with a value of either 0 or 1

How many bits are in a byte

8

Address

a numbered location in the main memory where a byte resides

What are some high-level languages

Java, C#, C++, Visual Basic, Python, Ruby

What type of language can a computer understand?

A low-level language

Compiler

Translates a program form a high-level language to a low-level language

Source program

A high-level language version of a program that you run on the compiler

What sort of programs do compiler produce?

machine or assembly language programs known as object programs

What does the Hava complier translate a Java program into?

byte-code

Byte Code

the machine language for a interpreter called the Java Virtual Machine

Interpreter

a hypothetical computer that translates each byte-code instruction, executing the resulting machine language instructions on the particular copmuter before translating the next byte-code instructions

What are most Java programs executed using?

Just-In-Time or JIT compiler

What command is used to get the compiler to translate the Java program into byte-code?

javac

What command is used to run machine-language instructions?

java

When was Java invented?

1991

Who created Java?

James Gosling and Sun Microsystems

What was the original purpose of Java?

to be a language for home appliances like toasters and tvs

What are the two kinds of Java programs?

applications and applets

Application

a regular program meant to be run on your computer

Applet

a little application meant to be sent to another location on the internet and run there

Programmar

the person who writes a program

User

the person who interacts with the program

Package

a library of classes that have been defined already

(import java.util.Scanner;)

Arguments

The item(s) inside parenthese that provide the information needed by methods

Variable

something that can store data

Statement

an instruction to the computer that ends with a semicolor

Syntax

the grammar rules for a programming language

System.out

an object for sneding output to the screen

println()

a method to print whatever is in parenthese to the screen

IDE

(integrated development environment)

cmbines a texte ditor with commands for compiling and running Java programs

The ending of a non-compiled program

.java

the ending of a compiled byte-vode verison of a Java program?

.class

the class to run a program will contain the words

public static void main(String[] args)

Bug

an error in a program

debugging

eliminating errors

Name three kinds of errors

Syntax, Runtime, and Logic errors

Syntax Error

grammatical mistake in a program

Runtime Errors

errors that are detected when your program is running but not compilation

Logic Errors

errors that are not detected during compilation or while running that cause the program to produce incorrect results