java programming - chapter 13 (in thai)

7/25/2019 Java Programming - Chapter 13 (in Thai)

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Computer Programming using JavaAdvanced Classes and Objects - 13

CHAPTER

3

(Advanced Classes and Objects)

1.

1) ( )

1 (Default Constructor)

2 (Detail Constructor)3 (Copy Constructor)

2)

t hi s

123456789

101112131415161718

publ i c cl ass Data {publ i c i nt x;publ i c Dat a( ) {

x = 0;}publ i c Dat a(int n) {

x = n;}publ i c Dat a(Data d) {

x = d.x;}publ i c bool ean i sEq1( int n) {

r et urn x == n;}publ i c bool ean i sEq2( Data d) {

r et urn x == d.x;}

}

d

xdxdd. xxDat a

n

d

x

i nt n

n

d

x

Dat ad(xd)

12

345678

publ i c cl ass Dat a {publ i c i nt x;

. . .publ i c Dat a( i nt x) {x = x; / / Er ror

}. . .

}

xx

12345

678

publ i c cl ass Dat a {publ i c i nt x;. . .publ i c Dat a( i nt x) {this.x = x;

}. . .}

x

x = -x this.x =

t hi s

1

2

3


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Computer Programming using Java 13 - Advanced Classes and Objects

1 [] TestNumNum Num (16 )

import java.util.Scanner;

public class TestNum {

public static void main(String[] args) {

} //End of main} //End of class

------------------------------------------------------------------------

public class Num {public int x;

public int y;Num() {

x = y = 0;}

Num(int x, int y) {this.x = x; this.y = y;

}Num(Num n) {

this.x = n.x; this.y = n.y;

}public boolean isEquals(int x, int y) {

}public boolean isEquals(Num n) {

}} //End of class

Num n1 = new Num();System.out.println(n1.x + "," + n1.y);

()

Num n2 = new Num(13, 2);System.out.println(n2.x + "," + n2.y);

Num n3 = new Num(n2);System.out.println(n3.x + "," + n3.y);

Num n4 = new Num(new Num(7, 11));System.out.println(n4.x + "," + n4.y);

Num n5 = new Num(n4.y, n3.x);System.out.println(n5.x + "," + n5.y);

n2 = new Num(new Num());System.out.println(n2.x + "," + n2.y);

1

2

3


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3) ( )

2 [] Coin (Value) (Side) (H) (T) DemoCoinCoin(20 )

public class Coin {

//sidepublic"H""T"//valuepublic 1 , 2 , 5 10

//list private final String list[] = { "H", "T" };

//(H) 0

//

//Coin

1234

56789101112

publ i c cl ass Dat a {publ i c i nt x;. . .publ i c int get X( ) {

return x;}publ i c Data get Data( ) {

Dat a d = new Dat a( x) ;return d;

}. . .

}

x

d

x

dd. x()


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//flip()(list)

//reverse()

//equals()

} //End of class

/* DemoCoin Coin4 1 2 () 5 2 ( ) 1 5 20 */


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public class DemoCoin {public static void main(String[] args) {


3 [] SetOfInteger

(30 )public class SetOfInteger {

//public iSet()

// 1 iSet

{ 7, 5, 3, 5, 3 } { 3, 5, 7 } ()public SetOfInteger(int[] x) {

} //End of constructor


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// 1 SetOfIntegeriSetpublic SetOfInteger(SetOfInteger s) {

} //End of constructor

//sort() public int[] sort(int x[]) {

for (int i = x.length - 1; i >= 1; i--)

for (int j = 0; j x[j + 1]) {

int temp = x[j];x[j] = x[j + 1];x[j + 1] = temp;

}}

}

return x;} //End of method

//removeDuplicatedMembers() public int[] removeDuplicatedMembers(int x[]) {

int t[] = new int[x.length];int index = 0;for(int i = 0; i < x.length; i++) {

if (i == 0) {t[index] = x[i];

index++;

} else {int j;

for (j = 0; j < index; j++) {if (t[j] == x[i]) break;

}if (j == index) {

t[index] = x[i];index++;

}

}}

int n[] = new int[index];

for (int i = 0; i < n.length; i++) n[i] = t[i];return n;

} //End of method


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//equals()iSet iSetx

public boolean equals(SetOfInteger x) {

} //End of method

//toString()iSet public String toString() {

} //End of method

//addElement()iSetiSet

public void addElement(int a) {

} //End of method


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//findElement()iSet-1

public int findElement(int a) {

} //End of method

//isSubset()iSets (Subset) -iSet

public boolean isSubset(SetOfInteger s) {

} //End of method

//union()iSet iSet (Union) SetOfInteger

public SetOfInteger union(SetOfInteger s) {

} //End of method


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//intersect() iSet iSet (Intersection) SetOfInteger

public SetOfInteger intersect(SetOfInteger s) {

} //End of method

} //End of class

2.

1) (1) 1

(2) 2

(Dat a)

[ ] = new [ ] ;

[ ] [ ] = new [ ] [ ] ;

1234567

publ i c cl ass Test Dat a {publ i c stati c voi d mai n( St r i ng [ ] ar gs) {Data d = new Data();Data e = new Data(13);

Syst em. out . pr i nt l n( d. x + ", " + e. x) ;}

}

d

x = 0

e

x = 13


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4 [] Student(30 )public class Student {

//3 private(4 ) id name score

//(2 )

//3 (2 )

d

1234

5678910

publ i c cl ass Test Dat a {publ i c stati c voi d mai n( St r i ng [ ] ar gs) {Data d[] = new Data[6];f or ( i nt i = 0; i < d. l engt h; i ++) {

d[i] = new Data(i);}d[2].x = 15;d[4].x = 30

}}

6

()

6 newf or

d[0]

x = 0

d[1]

x = 1

d[2]

x = 15

d[ 3]

x = 3

d[4]

x = 30

d[ 5]

x = 5


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//1 Student(2 )

//4 (10 ) getID() getName() getScore() setScore()

score

} //End of class

Freshmenmain()(15 )import java.util.Scanner;

public class Freshmen {public static void main(String[] args) {

Scanner kb = new Scanner(System.in);

//800 Student()


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// 5300121 5380021 4

//setScore()4 0 100

//4

//


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} //End of main

} //End of class

3.

1) ( )

5 [

]

(City)

(Land) (Owner) 3 OwnerLandCity(30 )

Owner Land City

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891011121314141617

publ i c cl ass Box {publ i c doubl e v;

public Data d;publ i c Box( ) {

v = 0. 0;d = new Data();

}

publ i c Box( doubl e a, Dat a b) {v = a;d = new Data(b);

}publ i c Box( Box b) {

v = b. v;d = new Data(b.d);

}. . .

}

Box

vd

x

vdoubl e ()

dDat a new


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1. Owner(10 )public class Owner {

//privateid( )//privatename

//public (int0 double0.0 )

//public 2

//public1 Owner

//publicgetID


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//publicgetName

//publicsetID 1 (id)

//publicsetName 1 (name)

//public show

} //End of class

2. Land(10 )public class Land {

//public n Owner (OwnerLand) //publicprice


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//public ( new)

//public 2 Owner

//public setOwner 1 Owner (n )

//public setPrice 1 (price)

//public show

} //End of class


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3. Citymainmain(10 )import java.util.Scanner;

public class City {


// Land 3000 50 x 60()

//( Default) 1 10

//ow1 "Tukie"1001

//ow2 "Annie"1002

//Tukie(4, 9)


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// Tukie 30

//Annie Tukie

//Tukie 50 (1) 50


6 [] Scanner1 1

Enter

12345678

91011

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

publ i c stati c voi d mai n( St r i ng[ ] ar gs) {Scanner kb = new Scanner ( Syst em. i n) ;System. out . pr i nt ( "Ent er I nt : ") ;i nt a = kb. next I nt ( ) ;System. out . pr i nt ( "Ent er St r : ") ;St r i ng b = kb. next Li ne( ) ;

Syst em. out . pr i nt l n( a + ", " + b) ;}

}

Ent er I nt : 10Ent er St r : 10

()Ent er I nt : 10

Ent er St r : J ava10, J ava


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SScanner SScanner Scanner(10 )import java.util.Scanner;import java.io.InputStream;

public class SScanner {//kbScanner

// 1 in InputStreamkb

//nextInt() 1

//nextLine() 1 0

} //End of class


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TestSScanner SScanner (5 )

public class TestSScanner {



7 [] ()

3 Fruit BasketFruitBasket !(50 )

1. Fruit(10 )public class Fruit {

//name //weigh

//wh private final double wh[] = { 0.1, 0.2, 0.3, 0.4, 0.5 };

//4

(wh)


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Fruit

//showFruit

} //End of class

2. Basket(20 )public class Basket {

//fruitFruit //count


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// 10

//

// Basket

//isFull

//isEmpty


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//takeIn 1 Basket Full

//takeOut1 Basket Empty

//getTotalWeigh


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//showBasket

} //End of class

3. FruitBasket (20 )import java.util.Scanner;

public class FruitBasket {

//getFruitBasket1 () ( )

//showFruitBasket - (Total Weigh) (Total Fruit) (List of Fruit)


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//mainpublic static void main(String[] args) {

//3 ( Basket) getFruitBasket1 (Apple)

0.12 25 2 (Orange) 0.1 303 (Melon) 0.45 15

// 6 ( Basket) 3 6 1-3 showFruitBasket

} //End of main

} //End of class


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8 [] 3021 2 StudentRoom

(Noob Levels) 4 1 (Noob) 2 (Father Noob) 3 (God Noob) 4 (Hof Noob)(30 )1. Student(10 )

public class Student {

//privateid//privatename

//privatenoob

//

// 3

// Student


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//publicgetID

//publicgetName

//publicgetNoob

//publicset Student

//publicshow 1 "[1-Noob]" 2 "[2-Father Noob]"3 "[3-God Noob]"4 "[4-Hof Noob]""[Un- known]"


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} //End of class

2.

Room302 116 40 40 38 (20 )

public class Room {

//publics 2 Student 302 1 16 40

public void setSeat Student (1) (1)113-16(2)

29-12(3)35-8(4)

4

1-4

// ()

1

16


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//public void showRoom

W, T (#)

//public void showStudent 2


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//public void showStudent

//main()(1)s 2 Student (

0 ""0(2)

5 Akeudom, Phakhin, Taparb, Ong-ard Wongyos 1, 1, 2, 3, 4

(3)

5 setSeat()(4)

5 showRoom()(5)

showStudent()

java programming - chapter 13 (in thai)

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