PowerPoint 프레젠테이션

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2 @ Lesson 2... ( ). ( ).

3 @ vs. logic data method variable behavior attribute method field Flow (Type), ( ) member

4 @ () : C program Method A ( ) Method B ( ) Method C () program : Java, C++, C# data

5 @ Program A Loose coupling (Robust) Tight cohesive Program B. (Reusable)

6 @ Method A Method B Member field Method Field (data) Method B - (data)

7 @ Identifiers, - Pascal ex) PersonInSchool, - Camel ex) moneyinmypocket, goschool() (,keyword ) $, _ ($ nested class, _ c ).(2,s2) $,_.

8 @ Type Type Java Primitive Object Wrapper Wrapper class Primitive Object Built-in Simple Type Built-in Floating-point Type Built-in Object Type User-defined Object Type Boolean type

9 @ premitive bit bit bit bit bit bit bit bit byte char short int long long float double

10 @ Keywords Keywords abstract float protected boolean for public break future strictfp byte generic return byvalue goto short assert if static case implements super catch import switch char inner synchronized class instanceof this const int throw continue interface throws default long transient do native true double new try else null var extends operator void false outer volatile final package while finally private New keywords assert,grayed words are reserved but not currently in use. Note: Grayed words are reserved but not currently in use. New keywords assert

11 @ keywords in types, byte short char int long float double boolean true false if else switch case default for do while while continue break

12 @ variable data (Storage of data) valuea = 5; valueb = 0; valuec = valueb + valuea; valuec? valueb 0 valuea 5 valued = 5; valued = valued + 6; 6 valued 5

13 @ data? (down) cast double float long int short, char byte promotion

14 @ data double float long int short, char byte 8 byte 4 byte 8 byte 4 byte 2 byte E3, E E-324 ~.8E E-0.5 ~ 3.4E038-2^63 ~ 2^ ^3 ~ 2^3 - -2^5 ~ 2^5, 0 ~ 2^6 (65536) -2^7 ~ 2^7 int 23 int short

15 @ data ( ) { { int d = 98; int c = 9; { int b = 0; { int a = 0; } } } } { }, { }, //

16 @ if, for Yes No (else) if( a%2==0){ System.out.println( ); }else { System.out.println( ); } i=0 i<9 for( int i=0 ; i< 9 ; i++){ } i= { },. i=0 0<9 { } i= <9 { } i=2, 9<9 end

17 @ - int to char casting public class IntToChar{ } public static void main(string[] args) { } for(int i=2;i<=30;i++){ } System.out.print( (char)i+" "); if(i%0==0){ } System.out.println();

@ Unicode 0 ~ 65536 // 50000 char cc=' '; System.out.

18 @ Unicode 0 ~ // char cc=' '; System.out.println((int)cc); //54620 for(int i=540;i<=55400;i++){ } System.out.print( (char)i+" "); if(i%0==0){ System.out.println(); }

19 @ int, double byte ba=0; byte bb=20; byte bc=0+20; byte bd=ba+bb; System.out.println(ba); System.out.println(bb); System.out.println(bc); System.out.println(bd); //error int ia=20; int ib=30; long la=40l; long lb=50l; float fa=45.0f; float fb=46.67f; double da=4.5; int ic=(int)(la+lb); float fc=ia+ib; double db=fa+ia;

20 @ Literal

21 @ Literal

22 @ Literal System.out.println("Hello\nMy name is Kildong Hong."); //Hello //My name is. // System.out.println("My Uncles\' book"); //My Uncles' book System.out.println("Hucks\b high."); //Huck high. System.out.println(" (\\) 4."); // (\) 4. System.out.println(" \"."); // ". System.out.println(0xFA); //250 6 System.out.println(0222); //46 8

23 @ Comment ( )

24 @ ( ) + -- * // % = = 45*34 = /34 45%34 x = x + 25; x += 25; x = x - 25; x -= 25; x = x * 25; x *= 25; x = x / 25; x /= 25; x = x % 25; x %= 25; x = x + ; x += ; x ++; ++x;

25 @ (, ) ==!= < > <= >= & ^ &&!, && short circuit. & vs. && vs.

26 @ Short-Circuit Test int ca=0, cb=20, cc=-30, cd=5, temp=23; if((temp>ca) (temp=='c')){ System.out.println("!!"); } if((temp>ca) (temp=='c')){ System.out.println(" 2!!"); } if((temp<ca)&(temp=='c')){ System.out.println(" 3!!"); } if((temp<ca)&&(temp=='c')){ System.out.println(" 4!!"); }

27 @ Logical Operate Test boolean boa=true, boa2=false, bob=true, bob2=false; System.out.println("P Q P&Q P^Q!P"); System.out.print((boa boa)+" "+(boa&boa)+" "+(boa^boa)+" "+(!boa)+"\n"); System.out.print((boa boa2)+" "+(boa&boa2)+" "+(boa^boa2)+" "+(!boa)+"\n"); System.out.print((boa2 boa)+" "+(boa2&boa)+" "+(boa2^boa)+" "+(!boa2)+"\n"); System.out.print((boa2 boa2)+" "+(boa2&boa2)+" "+(boa2^boa2)+" "+(!boa2)+"\n");

28 @ 2 = ~

29 @ bit (Bitwise ) Exclusive or 65^2= ^ Bit & 65&2= &

30 @ bit Bit 65 2= shift >> 65>>3=

31 @ bit shift >> 65>>3= shift << 65<<3=

32 @ bit shift >> -65>>3= shift >>> -65>>>3=

33 @ ( {}, tab ) Short circuit

34 @ (Tab) space., main (override). 30. continue break. final private.

35 @

36 @

37 @ :: If else

38 @ :: switch case

39 @ :: while

40 @ :: do while

41 @ :: for

42 @ :: break, continue, return

43 @ :: break, continue, return

44 @ :: break, continue, return

45 @. ) 00,.

PowerPoint 프레젠테이션

PowerPoint 프레젠테이션 @ Lesson 1,..... @ 1 Green Project 1991 Oak Java 1995. 5 December '90 by Patrick Naughton, Mike Sheridan and James Gosling Embedded in various consumer electronic device 1992. 9. 3 Star 7 1993 www portability