write a java program for Hybrid inheritance

 class Hybri 

{

int bonus=2000,sal=5000;

}

class chlid1 extends Hybri

{

void showchild1()

{

System.out.println("bonus"+bonus+"sal"+sal);

}

};

class chlid2 extends Hybri

{

void showchild2()

{

System.out.println("bonus"+bonus+"sal"+sal);

}

};

class Driver1

{

public static void main(String[] args) 

{

chlid1 c1=new chlid1();

        chlid2 c2=new chlid2();

c1.showchild1();

c2.showchild2();

}

}

super class private varibales can't access in child

 class Priva  //super class private varibales can't access in child

{

int a=10;

private int b=20;

}

class Use extends Priva //chlid

{ 

int c=20;

}

class Dri

{

public static void main(String[] args) 

{

Use p1=new Use();

System.out.println("public variable"+p1.a);

       System.out.println("private variable"+p1.b);

      System.out.println("private variable"+p1.c);

}

}

write a java program for character variable increment in java

 class D1 

{

public static void main(String[] args) 

{

char ch='X';

ch++;

System.out.println(ch);

}

}

write a java program for character variable Decrement in java

 class D1 

{

public static void main(String[] args) 

{

char ch='X';

ch--;

System.out.println(ch);

}

}

Print the average of three numbers given by user by creating a class named 'Average' having a method to calculate and print the average.

 class  Average

{

int a=5,b=4,c=3;

float avg;

void calaverage()

{

avg=(a+b+c)/3;

}

void printavg()

{

System.out.println("Average of three varibales"+avg);

}

public static void main(String[] args) 

{

    Average a1=new Average();

     a1.calaverage();

a1.printavg();

}

}

•Write a Java class Book with following features:

 

•Write a Java class Book with following features:

•Instance variables :

–title for the title of book of type String.

–author for the author’s name of type String.

–price for the book price of type double.

•Instance methods:

–public void setTitle(String title): Used to set the title of book.

–public void setAuthor(String author): Used to set the name of author of book.

–public void setPrice(double price): Used to set the price of book.

–public String getTitle(): This method returns the title of book.

–public String getAuthor(): This method returns the author’s name of book.

–Public double getPrice( ): Used to set the price of book.

class Book 

{

String title,author;

double price;

void setTitle(String t)

{

title=t;

}

void setAuthor(String a)

{

author=a;

}

void setPrice(double p)

{

price=p;

}

String getTitle()

{

return title;

}

String getAuthor()

{

return author;

}

double getPrice()

{

return price;

}

public static void main(String[] args) 

{

Book b1=new Book();

b1.setTitle("introduction to java");

b1.setAuthor("Dietiel");

b1.setPrice(550.60);

System.out.println("Book Title   "+ b1.getTitle()+"Author   "+b1.getAuthor()+"Price   "+b1.getPrice());

}

}

Write a Java class Author with following features:

 

•Write a Java class Author with following features:

•Instance variables :

–firstName for the author’s first name of type String.

–lastName for the author’s last name of type String.

•Instance methods:

–public void setFirstName (String firstName): Used to set the first name of author.

–public void setLastName (String lastName): Used to set the last name of author.

–public String getFirstName(): This method returns the first name of the author.

–public String getLastName(): This method returns the last name of the author.

class Author 

{

String firstname,lastname;

void setfirstname(String first)

{

firstname=first;

}

void setlastname(String last)

{

lastname=last;

}

String getfirstname()

{

return firstname;

}

String getlastname()

{

return lastname;

}

public static void main(String[] args) 

{

Author a1=new Author ();

a1.setfirstname("john");

a1.setlastname("k");

System.out.println("FirstName is"+a1.getfirstname()+"Last Nameis"+a1.getlastname());

}

}