Java Programming - Chapter 1 (in Thai)

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Computer Programming using JavaIntroduction to Java Programming - 01

CHAPTER

1

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(Introduction to Java Programming)

1. (Java Programming Concept)

1. 2 1) (Syntax)

2)

2.

3

1) (Class)

2) (Method)

3) (Statement)

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publ i c cl ass Hel l oJ ava {publ i c st at i c voi d mai n( St r i ng[ ] ar gs) {

Syst em. out . pr i nt l n( "Hel l o J ava") ;}

}


Syst em. out . pr i nt l n( "Hel l o J ava") ;}

}

1

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1 2 3 4

publ i c cl ass HelloJava {

}

publ i c cl ass Hel l oJ ava {publ i c st at i c voi dmain( St r i ng[ ] ar gs) {

}

}

ppubl i c

ppubl i c

1 (Semicolon)

1


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Computer Programming using Java 01 - Introduction to Java Programming

3. 3 (Comment)

3 1. (Single Line Comment)// Text

/ /

2.

(Multiple Line Comment)/* Text *// * */ 3. (Java Documentation Comment)/** Text */

Java Document

1 [] () () () () (8 )1) publ i c cl ass Test Test Test Test Test {

publ i c st at i c voi d mai n ( St r i ng [ ] ar gs) {System. out . pr i nt l n ( "Test J ava Progr ammi ng" ) ;

}}

2)

Publ i c cl ass Test {Publ i c stati c voi d mai n( St r i ng[ ] ar gs) {

Syst em. out . pr i nt ( "Test J ava\ n")}

}

3)

publ i c cl ass Test { publ i c st at i c voi d mai n( St r i ng ar gs[ ] ) {Syst em. out . pr i nt l n( "Test J ava") ; } / / End of mai n

} / / End of cl ass

4)

publ i c cl ass Test {publ i c stati c vi od mai n( St r i ng[ ] ar gs) {

Syst em. out . pr i nt l n( "Test J ava") ;}

}

5) publ i c cl ass Test J ava {publ i c stati c voi d mai n( St r i ng[ ] ar gs) {

System. er r . pr i nt l n( "Test J ava") ;}

}

6) publ i c cl ass t est {publ i c stat i c voi d mai n( St r i ng[ ] bank) {

Syst em. out . pr i nt ( "Test J ava") ;}

}

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publ i c cl ass Hel l oJ ava {publ i c st at i c voi d mai n( St r i ng[ ] ar gs) {Syst em. out . pr i nt l n( "Hel l o J ava") ;

} // End of method} /* End of class */


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7)

publ i c cl ass Test{ / / St ar t Cl ass

publ i c st at i c voi d mai n( St r i ng ar gs[ ] ){ / / St ar t Mat hod

Syst em. out . pr i nt l n( "Test J ava") ;} / / End of Cl ass

} / / End of Method

8)

publ i c cl ass Test {publ i c stati c voi d mai n( St r i ng[ ] ar g) {

/ * System. out . pr i nt l n( "Test J ava") ; */}

}

2 [] 1 MyFirstJavaProgram main4 int x = 5double y = 3.10000001y = y + xSystem.out.print("y = " + y + "\n")(6 )

4.

3 1)

( )

publ i c cl ass Hel l oJ ava {publ i c . . .

}cl ass Hi J ava {

publ i c . . .}

cl ass HeyJ ava {publ i c . . .

}


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34567891011

1 2 3 4

12

3456

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456

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12345678910

111213

1 2 3 4

2) ( )

3) ( )

4) ( )1.

2.

publ i c cl ass Hel l oJ ava {publ i c stati c voi d mai n( St r i ng[ ] ar gs) {

. . .}publ i c i nt add( i nt x, i nt y) {

. . .}publ i c st at i c bool ean check( doubl e n) {

. . .}

}


i nt x = 5;doubl e y = 3. 14;

}}


x = n++ / 2;

y = y + x;}

}


i nt x = 5;whi l e ( x >= 0) {

Syst em. out . pr i nt l n( x) ;x- - ;

}i f ( x == 0) {

Syst em. out . pr i nt l n( y) ;}

Syst em. out . pr i nt ( "End of Progr am") ;}

}

Semicolon

Semicolon

Semicolon


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1234

56789

1 2 3 4

1234

567

1 2 3 4

12

34567

1 2 3 4

12

34567

1 2 3 4

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1 2 3 4

3.

4.

5.

6.


i f ( x > 10) {y = y + x;

} el se {y = y x;}

}}


f or ( i nt i = 1; i


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1 2 3 4

5) 2 1 7 1

1 mainmai n

8 14 1

1

3 [] (10 )

4 [] (10 )

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i mpor t . j ava. ut i l . scanner ; {publ i c cl ass j ava {

Publ i c stat i c voi d / * publ i c */ mai n( St r i ng a[ ] ) {Scanner kb = new Scanner ( Syst em. i n)i nt i = kb. next I nt ( ) ;

I f ( i < 50) { Syst em. out . pr i nt l n( Hel l o J ava) ; }el se { System. out . Pr i nt ( Hel l o J aba) }}}

1234

5

I mpor t j ava. ut i l . Scanner ;publ i c Cl ass LoveJ ava {publ i c stati c vi od Mai n( st r i ng ar g) {

syst em. out . pr i nt ( "Gi ve me A f or t hi s cour se; ") ;

}


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5 [] (10 )

1 i nt x = kb. next I nt ( )2 x++3 Scanner kb = new Scanner ( Syst em. i n)4 Syst em. out . pr i nt l n( "r esul t = " + x)5 System. out . pr i nt l n( "er r or ")6 i f ( x ! = 0) . . . el se . . .7 whi l e(x < 100)

A main main 3, 17 7 6 2 if6 4 else 6 5()


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5. (1)

1)

2)

3)

4) (Escape Characters)

(1)

\n(New Line)(2)

\t(Horizontal Tab) 1 Tab = 8 Spaces(3)

\'Single Quote (' ) J System. out . pr i nt l n(" \ ' J \ ' " ) ;

(4)\"Double Quote (" ) Get A Java Syst em. out . pr i nt l n( "Get \ "A\ " J ava") ;

(5)\\Backslash (\ )

Tab key is \t Syst em. out . pr i nt l n( "Tab key i s \ \ t ") ;

6 [] (12 )

1. Syst em. out . pr i nt l n( "0" + "2") ;

2. Syst em. out . pr i nt l n( 0 + 2) ;

3. Syst em. out . pr i nt l n( 0 + "2") ;

4. System. out . pr i nt l n( 0 + 3 + "2") ;

5. System. out . pr i nt l n( "0" + 3 + 2) ;

Syst em. out .print( . . . ) ;

Syst em. out .println( . . . ) ;

Syst em. out . pr i nt ( "Hel l o J ava") ;

Syst em. out . pr i nt l n( "Hel l o J ava") ;

Hel l o J ava.

Hel l o J ava.

(Cursor)

Syst em. out . pr i nt l n( "Hi " + 5) ; + = Hi 5

System. out . pr i nt l n( 8 + 5) ; + = 13

Syst em. out . pr i nt l n( "Hi " + "V") ; + = Hi V

JLab

1 Tab = 6 Spaces


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6. System. out . pr i nt l n( 0 + "3" + 2) ;

7. Syst em. out . pr i nt l n( "0" + ( 3 + 2) ) ;

8. Syst em. out . pr i nt l n( 032) ;

9. Syst em. out . pr i nt l n( "0"32) ;

10. System. out . pr i nt l n( "Hel l o\ t J ava") ;

11. System. out . pr i nt ( " \ \ \ t \ \ \ xxx\ n") ;

12. System. out . pr i nt l n( " \ " \ \ \ \ \ ' / / \ " " ) ;

7 []

MyProfile (10 )

8 [] Shape

(10 ) *************************


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9 [] Test My first JAVA program

My JAVA tutor web site is http://www.javachula.co.cc ( ) 18 Click End of class End of method (10 )

2. (Compiling and Running Program)

1.

10 []() () () () () () (15 )1)

publ i c cl ass Test {publ i c stati c voi d mai n( St r i ng[ ] ar gs) {

Syst em. out .pr i nt l n( "xxxxx");

}}

Demo.java

public class Demo {

public static void {System.out

}

}

Demo.class

1001101010111101

1010101110101010

1010010101010100

001011101111

Hello!javac Demo.java java Demo

1 2 3 4 5 6

7

Demo.java

Edit/Coding Source Code Compile Byte Code Run/Execute Output/Result

Debugging


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2)


Syst em. out . pr i nt l n( "xxxxxxxxxxxxxxx") ;

}

}

3)


System. out . pr i nt l n( "xxxxx" +"xxxxx" +"xxxxx") ;

}}

4) publ i c cl ass Test {

voi d mai n( St r i ng[ ] ar gs) {Syst em. out . pr i nt l n( "xxxxx") ;

}

}

5) publ i c cl ass Test {publ i c stati c voi d noob( St r i ng[ ] ar gs) {

Syst em. out . pr i nt l n( "xxxxx") ;}

}

6) publ i c cl ass mai n {publ i c stati c voi d mai n( St r i ng[ ] ar gs) {


}

7)

publ i c cl ass voi d {publ i c stati c voi d mai n( St r i ng[ ] ar gs) {


}

8) publ i c cl ass {

publ i c stati c voi d mai n( St r i ng[ ] ar gs) {Syst em. out . pr i nt l n( "xxxxx") ;

}}

9) publ i c cl ass St r i ngs }

publ i c stati c voi d mai n( St r i ng[ ] ar gs) {Syst em. er r . pr i nt l n( "xxxxx") ;

}}

10)

publ i c cl ass Publ i c {/ / System. out . pr i nt l n( "xxxxx") ;

}

11)

publ i c cl ass 3Gi r l _And_1Man {publ i c stati c voi d mai n( St r i ng[ ] ar gs) {

/ / Love you "J ava"}

}

12) publ i c cl ass Swi ngi ng {

publ i c stati c voi d mai n( St r i ng[ ] ar gs) {Sys tem. out . pr i nt l n( "xxxxx" ) ; ; ; ; ; ; ; ; ; ; ; ; ;

}}


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13) publ i c / * pr i nt l n */ c l ass /* Cl ass */ Test { / / {

publ i c / * ??? */ stati c voi d mai n / * j ava */( St r i ng[ ] ar gs) {

/ * / / System. out . pr i nt l n( "xxxxx") ; */ }} / / }

14) cl ass Test {

publ i c stati c voi d mai n( St r i ng[ ] ar gs) {{ / / St ar t i ng the pr ogr am Syst em. out . pr i nt l n( "xxxxx") ;

{ / / St ar t i ng t he sub- pr ogr am Syst em. out . pr i nt l n( "yyyyy") ;

Syst em. out . pr i nt l n( "yyyyy") ;} / / Endi ng t he sub- pr ogr am

} / / Endi ng t he pr ogr am}

}

15) publ i c cl ass Cl ass {/ / System. out . pr i nt l n( "xxxxx") ;

publ i c st at i c voi d mai n( St r i ng[ ] ar gs) {}}

3. (Flowchart)

1. (Flowchart)(Psudocode)

2.

1. Terminator

2. Data ()

3. Manual Input (, )

4. Process

5. Decision 6. Display

7. Document ()

8. Predefined Process

9. On-page Connector

10. Off-page Connector

11. Arrow Line


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11 [] (18 )1)

z = x + y (Integer) x y x y z (4 )

2)

(Real) n1 n2n1 n2 n1 n2 n1 n2 (6 )

3) n i 0 i n Java i 1 (i++) in (8 )

12 [] 2 (20 )1) (Unit)

(Price) 30 (Amount) (8 )2)

100 60 3 20 (12 )

1 2 3


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13 []B1, B2 C A (5 )

1 2

A B1 B2 C

1

2

3

4

5

C = 1

A

B1 = A + 2

B2 = A + C

C < 6

C = A + 2

A

No

Yes

Start

B1 = A + 2

B2 = A + C

End

Java Programming - Chapter 1 (in Thai)

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