CMSC131 Midterm #1 Java Terminology

Java Compiler

Converts source code into machine code file, and runs everything at once 

Java Interpreter

Converts machine code when program is run, goes LINE by LINE to understand what each line does. Debuggers are based on interpreters 

Interpreter vs Compiler

Java Virtual Machine

loads up all bytecode from .class files and runs program

Scanner Syntax

import java.util.Scanner;

High level languages

java, python

low level languages

assembly, c

primitive data

data type that canot be manipulated (int, double, float, long, short, byte, boolean, char)

primitiveType name = data;

object data

String, Scanner (notice all uppercase)

ObjectType name = new ObjectType();

Pass by values

a mechanism to pass everything in java

static methods

with static methods, objects are NOT created

syntax: className.methodName(); or className.variableName();

non-static

with non-static methods, objects ARE created

syntax: object.methodName();