W6 COMPUTER PROGRAMMINING 2020 SPRING

W6 further in class concepts, introduction to composition & inheritance, class array structures

W6Ex1

public class book

{ public String name,author;

int year;

public book(String namei,String authori,int yeari)

{name=namei;author=authori;year=yeari;}

public book(book bi)

{name=bi.name;author=bi.author;year=bi.year;}

public String toString()

{String s="book name = "+name+" book author = "+author+" publication year = "+year;

return s;

}

}

public class library

{ public book b[];

String library_name;

public library(String namei,book bi[])

{library_name=namei;

int n=bi.length;

b=new book[n];

for(int i=0;i<n;i++)

{b[i]=bi[i];}

}

public String toString()

{String s=" Library name : "+library_name+"\n";

int n=b.length;

for(int i=0;i<n;i++)

{s+=b[i]+"\n";}

return s;

}}

import javax.swing.JOptionPane;

public class W6Ex1

{

public static void main(String arg[])

{ book b1=new book("heat transfer","Özışık",1976);

book b2=new book("the plaque","Camus",1987);

book b3=new book("Computer programing","Çoban",2019);

book b[]={b1,b2,b3};

library lib=new library("week 6 library",b);

JOptionPane.showMessageDialog(null,lib);

}

}

import javax.swing.JOptionPane;

public class W6Ex1A

{

public static void main(String arg[])

{ book b1=new book("heat transfer","Özışık",1976);

book b2=new book("the plaque","Camus",1987);

book b3=new book("Computer programing","Çoban",2019);

book b[]=new book[3];

for(int i=0;i<b.length;i++)

{b[i]=new book(b1);}

librarya l=new librarya("week 6 librarya",b);

JOptionPane.showMessageDialog(null,l);

}

}

EX2

public class box

{ double width,length,height;

String bcolor;

public box(double widthi,double lengthi,double heighti,String bc)

{width=widthi;length=lengthi;height=heighti;bcolor=bc;}

public double area()

{return width*length+width*height+length*height;}

public double volume()

{return length*width*height;}

public String toString()

{String s="width = "+width+" m length = "+length+" m height = "+height+" m area = "+area()+" m"+'\u00B2'+" volume = "+volume()+" m"+'\u00B3'+" color = "+bcolor+"\n";

return s;

}

}

Composition: red_box

public class red_box

{ public box b;

public red_box(double widthi,double lengthi,double heighti)

{b=new box(widthi,lengthi,heighti,"red");}

public String toString()

{String s=""+b;

return s;}

}

Inheritance: blue_box

public class blue_box extends box

{ public blue_box(double widthi,double lengthi,double heighti)

{super(widthi,lengthi,heighti,"blue");}

}

Inheritance: yellow_box

public class yellow_box extends box

{ public yellow_box(double widthi,double lengthi,double heighti)

{super(widthi,lengthi,heighti,"yellow");}

}

W6Ex2.java

import javax.swing.JOptionPane;

public class W6Ex2

{

public static void main(String arg[])

{ box b1=new _box(1.2,2.3,1.5,"red");

box b2=new box(1.3,2.5,1.7,"blue");

box b3=new box(1.0,2.0,1.0,"yellow");

String s=""+b1+b2+b3;

JOptionPane.showMessageDialog(null,s);

}}

W6Ex2A.java

import javax.swing.JOptionPane;

public class W6Ex2A

{

public static void main(String arg[])

{ red_box b1=new red_box(1.2,2.3,1.5);

blue_box b2=new blue_box(1.3,2.5,1.7,"blue");

box b3=new box(1.0,2.0,1.0,"yellow");

String s=""+b1+b2+b3;

JOptionPane.showMessageDialog(null,s);

}

}

W6Ex2B.java

import javax.swing.JOptionPane;

public class W6Ex2B

{

public static void main(String arg[])

{ yellow_box b1=new yellow_box(1.2,2.3,1.5);

blue_box b2=new blue_box(1.3,2.5,1.7);

box b3=new box(1.0,2.0,1.0,"red");

box b4=new box(1.7,2.7,1.7,"green");

box b[]={b1,b2,b3,b4};

String s="";

for (int i=0;i<b.length;i++) {s+=b[i];}

JOptionPane.showMessageDialog(null,s);

}

}

W6Ex3 complex class

public class complex

{ public double real,imag;

public complex(double r,double i)

{real=r;imag=i;}

public complex(complex c)

{real=c.real;imag=c.imag;}

public void add(complex c)

{real+=c.real;

imag+=c.imag;

}

public static complex add(complex c1,complex c2)

{complex c3=new complex((c1.real+c2.real),(c1.imag+c2.imag));

return c3;

}

public String toString()

{String s="("+real+" + i*"+imag+")";

return s;

}

}

W6Ex3.java

import javax.swing.JOptionPane;

public class W6Ex3

{

public static void main(String arg[])

{ complex c1=new complex(1.2,2.3);

complex c2=new complex(1.1,2.0);

complex c3=complex.add(c1,c2);

JOptionPane.showMessageDialog(null,""+c1+"+"+c2+" = "+c3);

}}

W6Ex3A.java

import javax.swing.JOptionPane;

public class W6Ex3A

{

public static void main(String arg[])

{ complex c1=new complex(1.2,2.3);

complex c2=new complex(1.1,2.0);

complex c3=new complex(c1);

c3.add(c2);

JOptionPane.showMessageDialog(null,""+c1+"+"+c2+" = "+c3);

}

}

W6Ex3B.java

import javax.swing.JOptionPane;

public class W6Ex3B

{

public static void main(String arg[])

{ complex c1=new complex(1.2,2.3);

complex c2=new complex(1.1,2.0);

complex c3=new complex(c1);

c3.multiply(c2);

JOptionPane.showMessageDialog(null,""+c1+"+"+c2+" = "+c3);

}}

W6Ex3C.java

import javax.swing.JOptionPane;

public class W6Ex3C

{

public static void main(String arg[])

{ complex c1=new complex(1.2,2.3);

complex c2=new complex(1.1,2.0);

complex c3=complex.multiply(c1,c2);

JOptionPane.showMessageDialog(null,""+c1+"+"+c2+" = "+c3);

}}

W6Ex4

public class vector

{ public double x[];

//x=x[0] y=x[1] z=x[2]

public vector(double xi,double yi,double zi)

{double x1[]={xi,yi,zi};

x=x1;

}

public vector(double xi[])

{x=xi;}

public vector(vector v)

{ x=new double[3];

for(int i=0;i<x.length;i++) {x[i]+=v.x[i];}

}

public void add(vector A)

{for(int i=0;i<x.length;i++) {x[i]+=A.x[i];}}

public static vector add(vector A,vector B)

{ vector C=new vector(A);

C.add(B);

return C;

}

//Scalar multiplication=dotproduct of two vectors

// i*i=1 j*j=1 k*k=1 i*j=0 i*k=0 j*k=0 A.B

public void dotproduct(vector A)

{for(int i=0;i<x.length;i++) {x[i]*=A.x[i];}}

public static vector dotproduct(vector A,vector B)

{ vector C=new vector(A);

C.dotproduct(B);

return C;

}

//Vectorel multiplication=crossproduct of two vectors

// i*j=k j*k=i k*i=j j*i=-k k*j=-i i*k=-j

//i*i=0 j*j=0 k*k=0 AxB

public void crossproduct(vector B)

{ double x1=x[1]*B.x[2]-x[2]*B.x[1];

double y1=x[2]*B.x[0]-x[0]*B.x[2];

double z1=x[0]*B.x[1]-x[1]*B.x[0];

x[0]=x1;x[1]=y1;x[2]=z1;

}

public static vector crossproduct(vector A,vector B)

{ double x1=A.x[1]*B.x[2]-A.x[2]*B.x[1];

double y1=A.x[2]*B.x[0]-A.x[0]*B.x[2];

double z1=A.x[0]*B.x[1]-A.x[1]*B.x[0];

vector C=new vector(x1,y1,z1);

return C;

}

public String toString()

{String s="["+x[0]+"*i+" + x[1]+"*j+"+ x[2]+"*k]";

return s;

}

}

W6Ex4.java add

import javax.swing.JOptionPane;

public class W6Ex4

{

public static void main(String arg[])

{ vector v1=new vector(1.0,1.0,1.0);

double x[]={1,2,3};

vector v2=new vector(x);

vector v3=vector.add(v1,v2);

JOptionPane.showMessageDialog(null,""+v1+" + "+v2+" = "+v3);

}}

W6Ex4A.java add

import javax.swing.JOptionPane;

public class W6Ex4A

{

public static void main(String arg[])

{ vector v1=new vector(1.0,1.0,1.0);

double x[]={1,2,3};

vector v2=new vector(x);

vector v3=new vector(v1);

v3.add(v2);

JOptionPane.showMessageDialog(null,""+v1+" + "+v2+" = "+v3);

}}

W6Ex4B.java dotproduct

import javax.swing.JOptionPane;

public class W6Ex4A

{

public static void main(String arg[])

{ vector v1=new vector(1.0,1.0,1.0);

double x[]={1,2,3};

vector v2=new vector(x);

vector v3=new vector(v1);

v3.dotproduct(v2);

JOptionPane.showMessageDialog(null,""+v1+" + "+v2+" = "+v3);

}}

W6Ex4C.java dotproduct

import javax.swing.JOptionPane;

import javax.swing.JOptionPane;

public class W6Ex4C

{

public static void main(String arg[])

{ vector v1=new vector(1.0,1.0,1.0);

double x[]={1,2,3};

vector v2=new vector(x);

vector v3=vector.dotproduct(v1,v2);

JOptionPane.showMessageDialog(null,""+v1+" + "+v2+" = "+v3);

}}

W6Ex4D.java crossproduct

import javax.swing.JOptionPane;

public class W6Ex4D

{

public static void main(String arg[])

{ vector v1=new vector(1.0,1.0,1.0);

double x[]={1,2,3};

vector v2=new vector(x);

vector v3=new vector(v1);

v3.crossproduct(v2);

JOptionPane.showMessageDialog(null,""+v1+" + "+v2+" = "+v3);

}}

W6Ex4E.java crossproduct

import javax.swing.JOptionPane;

public class W6Ex4E

{

public static void main(String arg[])

{ vector v1=new vector(1.0,1.0,1.0);

double x[]={1,2,3};

vector v2=new vector(x);

vector v3=vector.crossproduct(v1,v2);

JOptionPane.showMessageDialog(null,""+v1+" + "+v2+" = "+v3);

}}

HOMEWORK EXERCISES

W6HW1: car and car registry classes are given add the following lis into the carregistry and list the output

brand	model	year
Ford	fiesta	2010
Ford	mustang	1968
Fiat	Aegea	2019
Fiat	cinquocento	1978
BMC	austin	1976

public class car

{ public String brand,model;

int year;

public car(String brandi,String modeli,int yeari)

{brand=brandi;model=modeli;year=yeari;}

public String toString()

{String s="car brand = "+brand+" model = "+model+" year = "+year+"\n";

return s;

}

}

public class car_registry

{ public car c[];

String registry_name;

public car_registry(String namei,car ci[])

{registry_name=namei;

int n=ci.length;

c=new car[n];

for(int i=0;i<n;i++)

{c[i]=ci[i];}

}

public String toString()

{String s=" Registry : "+registry_name+"\n";

int n=c.length;

for(int i=0;i<n;i++)

{s+=c[i]+"\n";}

return s;

}

}

W6HW2 create Ford class a) by using composition b) by using inheritance and add them into the car_registry class

W6HW3: calculate the following by using complex class

Z₁=3-2i Z₂=1+3.2i Z₃=( Z₁²+2)( Z₁ + Z₂) Z₄=( Z₁ - Z₂)( Z₁ + Z₂)

W6HW4: A force of F=10i+11j+2k is applied to end of a bar with position of A=0.707106781i+0.707106781j+0k. Find the Moment M=AxF (cross product of this two vector)