Java 2 Micro Edition 관련 전반적인 기술 개요

Java 2 Micro Edition

Java2 Micro edition Introduction

Java 2 J2MECDCCLDC MIDP J2ME

Java2 Micro edition Introduction

Java 2 Micro- J2ME technologyStandard- J2SE technologyEnterprise- J2EE technology Java VM API API

Java2 Micro edition Introduction

J2ME(Java2 Micro Edition) 2 VM API (configuration) (profile)

Java2 Micro edition Introduction

(Configuration) API (CLDC) (CDC) API . 128~512 KB 512 KB

Java2 Micro edition Introduction

(Profile) API API API

Java2 Micro edition Introduction

(Profile) (2)Sun's Java Community ProcessSM Program http://java.sun.com/aboutjava/communityprocess/

Java2 Micro edition Introduction

J2ME J2ME LibraryJava VMJ2ME ProfileConfiguration : API Profile :

Java2 Micro edition Introduction

CDCConnected Device ConfigurationCLDC 32-bit CPU System2MByte (RAM ROM ) (9600 bps ) PDA, ,

Java2 Micro edition Introduction

CLDCConnected Limited Device Configuration CPU 16-bit, 32-bit CPU160 512 KByte (RAM ROM) , , , PDA

Java2 Micro edition Introduction

ProfilesEditionCDCCLDCPersonal Profile(Personal Java)Handheld Profile

MID ProfileJ2ME CDC Libs.J2ME CLDC Libs.C virtual machineK virtual machine

Java2 Micro edition Introduction

PersonalJava, EmbeddedJavaPersonalJava (version 3.1)JDK 1.1 J2ME CDC Java 2 EmbeddedJava . J2ME API

Java2 Micro edition Introduction

CLDC Java VM 128KB ROMJava 32KB RAM ,

Java2 Micro edition Introduction

CLCD CLDC CLDC life cycle (, , ) High-level (

Java2 Micro edition Introduction

CLDC Finalize JNI(Java Native Interface) (reflection)

Java2 Micro edition Introduction

CLDC API VM

Java2 Micro edition Introduction

CLDC (preverifier) JAR Preloading/prelinking Romize VM S/W

Java2 Micro edition Introduction

CLDC API Libraryjava.ioData stream java.lang java.util, javax.microedition.io

Java2 Micro edition Introduction

MID Mobile Information Device Profile CLDC Display : 96x54Color depth : 1 bitInput : Memory : 128KB ROM, 32KB RAM, 8KB Persistent Storage

Java2 Micro edition Introduction

MIDP Mobile Information DeviceNative System SoftwareCLDC(MIDlet)MIDPOEM OEM classNative MIDP

Java2 Micro edition Introduction

JAM Java Application ManagerMIDP (MIDlet) , , , MIDlet JAR MIDlet ,

Java2 Micro edition Introduction

(Manifest)MIDlet JAR JAM JAD(java application descripter) JAD MIDlet javax.microedition.midlet.MIDlet JAR MIDlet JAR MIDlet

Java2 Micro edition Introduction

MIDP CLDC AWT(abstract window toolkit) lcdui API lcdui API High-level API : APILow-level API : APIScreen (High-level) Canvas (Low-level)

Java2 Micro edition Introduction

MIDP CLDC Javax.microedition.midletJavax.microedition.ioJavax.microeditoin.rmsJavax.microedition.lcdui

Java2 Micro edition Introduction

J2ME Wireless ToolkitMIDP API JAD , Win98se, Windows NT, Windows 2000Java2 Standard Edition, 1.3.0

Java2 Micro edition Introduction

MIDP Step 1: Step 2: javac d .\ -bootclasspath c:\classes myMIDlet.javapreverify classpath c:\classes;c:\work\myMIDlet.class myMIDlet.classStep 3: midp myMIDletStep 4: jad jar cf mypack.jar myMIDlet.classStep 5: midp descriptor mypack.jad

Java2 Micro edition Introduction

J2ME C . LG Telecom, NTT . PDA IMT-2000

Java2 Micro edition Introduction

XCE http://developer.xce.co.krLG http://java.ez-I.co.kr http://www.mobilejava.co.kr

Java2 Micro edition Introduction

mailto://[email protected]

Java2 Micro edition Introduction

. . float, double Object.finalize() . . Java.lang.Error Java.lang.VirtualMachineError Java.lang.OutOfMemoryErrorJNI RMI, Serialize JINI