J2ME(Java 2 Platform Micro Edition)

1
J2ME(Java 2 Platform Micro Edition)

• ???????????4?D?
• n02k1110 ?? ??

2
??

• J2ME?????????35
• Java?3??Edition
• J2ME????????????
• Java2????????
• J2ME?????????610
• ??????????
• ????????
• ??????
• J2ME???????????1112
• MIDP/CLDC?????????????????????
• ??
• ???
• ????????13

3
Java?3??Edition

• J2EE(Java 2 Platform Enterprise Edition)
• ???????????????????????????????
• J2SE(Java 2 Platform Standard Edition)
• ?PC????????????????
• J2ME(Java 2 Platform Micro Edition)
• ???????????????

4
J2ME????????????(6)

• ??
• ?????????????????????????J2SE?J2EE????????????
• ????
• ?????????? ??????

5
Java2????????(5)
J2ME???????
??????
??????????
6
J2ME???????????

• CLDC(Connected Limited Device Configuration)
• ????????????
• ???????PDA??
• CDC(Connected Device Configuration)
• ?????????????????
• CLCD????????????????
• ???????????????
• ????????????????????????

7
CLDC?CDC?????????(3)
Javax.microedition.
J2SE
CDC
CLDC
??
CDC http//java.sun.com/products/cdc/api.html
CLCDhttp//java.sun.com/j2me/docs/pdf/cldc11api.p
df
8
J2ME?????????

• KVM(K Virtual Machine)
• CLDC??VM
• KB??
• CVM(Compact Virtual Machine)
• CDC??VM

9
J2ME???????

• CLDC?
• MIDP(Mobile Information Device Profile)
  JSR37
• ?????
• PDAP(Personal Digital Assistant Profile)
  JSR75
• ??????? (PIM) ???????PDA
• CDC?
• FP(Foundation Profile) JSR219
• ???????????
• PP(Personal Profile)CDC?FP???? JSR216
• ?GUI???????????
• PBP(Personal Basis Profile)CDC?FP????
  JSR217
• ?PP??????
• RMIP(RMI Profile)CDC?FP???? JSR66
• ?RMI??????

10
MIDP???????????

• MIDPCLDCKVM
• ?????????
• Java2SDK??????1.3??
• (DL?http//java.sun.com/j2se/1.4.2/)
• ???????????
• WTK(J2ME Wireless Toolkit)???????
• (DL?http//java.sun.com/products/j2mewtoolkit/ja_
  download-1_0_4.html)
• WTK1.0.4CLDC1.0/MIDP1.0???
• WTK2.0CLDC1.1/MIDP2.0???
• ???????????????????????
• ???????????WTK????

11
??
import javax.microedition.midlet. import
javax.microedition.lcdui. public class
HelloMIDP extends MIDlet implements
CommandListener private Form form new
Form("Hello MIDP") //??????? public
HelloMIDP() //cmdStart new
Command("Start", Command.SCREEN, 2)
//cmdExit new Command("Exit", Command.SCREEN,
3) form.append("Hello,MIDP!")
form.addCommand(new Command("Exit",Command.EXIT,1)
) form.setCommandListener(this)
//??????????? public void startApp()
Display.getDisplay(this).setCurrent(form)
//????????????? public void pauseApp()
//??????????? public void
destroyApp(boolean unconditional)
//????????? public void commandAction(Command
c, Displayable d) destroyApp(false)
notifyDestroyed()
12
J2ME?????

• ????Felica????
• ?i?????????????????Edy????????????????????
• ?????????
• ?????

13
????

• 1 ??????????2004.4??IDG?????p.177p.190?
  (2004.4.1)
• 2 ?JAVA PRESS vol30????????p.202-p.213?(2003.6.15
  )
• 3 ?Java????????????J2ME?????????????????????
• ??????????????(2004.12.25)
• 4 ?J2ME ?????Java?????????ASCII?(2002.5.11)
• 5 ?Java2 Micro Edition??http//akimoto-jp.com/jav
  a/Mobile/J2ME.html
• 6 ???????????http//www.nec-mfriend.com/jp/index.
  php
• 7 ?Java????? http//webclub.kcom.ne.jp/ma
  /maknakat/Tech_Info3/html/2_1(Java).html
• 8 ???????????????????????
• http//www.intel.co.jp/jp/developer/update/cont
  ents/mo11031.htm
• 9 ?J2ME????????
• http//e-words.jp/n/J2ME.html