ILLICIT KNOWLEDGE

Recursive program on Tower of Hanoi. import java.util.*; class TowerHRec {     public static void main(String args[])     {         int n;         char beg='A',aux='B',end='C';         Scanner sc=new Scanner(System.in);         System.out.println("Enter number of disks:");         n=sc.nextInt();         TowerHRec obj=new TowerHRec();         obj.move(n,beg,aux,end);     }     void move(int n,char beg,char aux,char end)     {         if(n==1)           System.out.println("Move "+n+" disks from "+beg+" -> "+end);                   else         {             move(n-1,beg,end,aux);             System.out.printl...

Queue data structure using Array. import java.util.*; class arrayQueue {     protected int Queue[] ;     protected int front, rear, size, len;     //Constructor     public arrayQueue(int n)     {         size = n;         len = 0;         Queue = new int[size];         front = -1;         rear = -1;     }       //Function to check if queue is empty     public boolean isEmpty()     {         return front == -1;     }       //Function to check if queue is full     public boolean isFull()     {         return front==0 && rear == size -1 ;     }       //Function to get the size of the queue     public int getSize()     {    ...

Implement Stack data structure using Array. import java.util.*; class Stack1 {     int s[],max,top;     public static void main()     {         int ch,size;         Scanner sc =new Scanner(System.in);         System.out.println("Enter the size of the stack");         size=sc.nextInt();         Stack1 obj=new Stack1();         obj.assign(size);         while(true)         {             System.out.println("1:PUSH\n2:POP\n3:DISPLAY\n4:EXIT");             System.out.println("Enter your choice");             ch=sc.nextInt();             switch(ch)             {                 case 1: System.out.pr...

Write a Program in Java to input a number and display the Evil Numbers from 1 to 50. import java.util.*; class EvilNumber {     String toBinary(int n) // Function to convert a number to Binary     {         int r;         String s="";         char dig[]={'0','1'};         while(n>0)             {                 r=n%2; //finding remainder by dividing the number by 2                 s=dig[r]+s;                 n=n/2;             }         return s;     }//toBinary         int countOne(String s)     {         int c = 0, l = s.length();         char ch;         for(int...

Write a menu driven program to perform the following using objects of the same class: i)distance of a given point from the origin ii)distance between two given points iii)coordinates of the midpoint of a line joining two points import java .util.*; class Point { double x,y;   public Point()   {x=0;    y=0;   }   public Point(double a,double b)   {x=a;    y=b;   }   public double distance(Point ob)   {double d;    d=Math.sqrt((Math.pow((this.x-ob.x),2))+(Math.pow((this.y-ob.y),2)));     return d;   }//end of distance()    public double disfromOrigin()   {double dis;    dis=Math.sqrt(x*x+y*y);      return dis;   }    public Point mid(Point ob)   {Point m;    m=new Point();    m.x=(ob.x+this.x)/2;    m.y=(ob.y+this.y)/2;    return m;   }//end of mid()   public stat...

Take two positive integer of two digits or more, reverse the digits, and add to the original number. This is the operation of the reverse-then-add-sequence. Now repeat the procedure with the sum so obtained until a palindromic number is obtained. import java.util.*; class Reverse_sequence { public static boolean isPalindrome(int n)   { int d,r=0,p=n;    while(p!=0)    { d=p%10;      r=r*10+d;      p=p/10;    }     if (r==n)      return true;     else     return false;  }//end of fucntion isPalindrome  public static int reverse(int n)  { int m=n,d=0;    while(m!=0)    { d=d*10+(m%10);      m=m/10;    }    return d;  }  public static void main()  {  int n,s;     Scanner sc= new Scanner (System.in);     System.out.println("Enter a no.");   ...

To design a class Complex to represent operations on Complex numbers,ie. Addition, subtraction, modulus, conjugate, multiplication, division using objects of the same class. import java.util.*; class Complex { double r,i;     public Complex()     {r=0;      i=0;     }     public Complex(double a,double b)     {r=a;      i=b;     }     public double mod()     { return Math.sqrt(r*r+i*i);}     public Complex conju()     {Complex ob= new Complex();      ob.r=this.r;      ob.i=-this.i;      return ob;     }     public Complex sum(Complex ob)    { Complex xy= new Complex();       xy.r=this.r+ob.r;       xy.i=this.i+ob.i;       return xy;    }//end of sum()     public Complex dif(Complex ob)   ...

Write a program in Java to find the value of Mobius function of a user input number. import java.util.*; class MobiusFn {     int n;         MobiusFn()     {         n = 0;     }         void input()     {         Scanner sc = new Scanner(System.in);           System.out.print("Enter a number : ");         n = sc.nextInt();     }         /*  The function primefac() either returns '0' if prime factors are repeated      *  or returns the no.of prime factors */     int primeFac()     {         int a=n, i=2, m=0, c=0, f=0;                     while(a > 1) // loop to generate prime factors         {           ...

Write a program to input a number and check whether it is a Fascinating Number or not      within the range 100 to 3000. import java.util.*; class FascinatingNumber {     boolean isUnique(String q)     {         int A[] = {0,0,0,0,0,0,0,0,0,0}; //to store frequency of every digit from '0' to '9'         int i, flag = 0;         char ch;         for(i=0; i<q.length(); i++)         {             ch = q.charAt(i);             A[ch-48]++;         }         for(i=1; i<10; i++)         {             if(A[i]!=1)             {                 flag = 1; //flag is set to 1 if frequency is not 1       ...

Amicable numbers are two different numbers so related that the sum of the proper divisors of each is equal to the other number. Write a program in Java to find out the given two numbers are amicable or not. class amicable {  static int a,b;  static void input(int m,int n)  {      a=m;      b=n;      display();     }//input     static boolean check()     {         int s=0,i;         for(i=1;i<a;i++)         {             if(a%i==0)             {                 s=s+i;             }         }         if(s==b)         {             s=0;             for(i=1;i<b;i++) ...

Write a Program in Java to input a word and print its anagrams. import java.util.*; class Anagrams {     int c = 0;         void input()     {         Scanner sc = new Scanner(System.in);         System.out.print("Enter a word : ");         String s = sc.next();         System.out.println("The Anagrams are : ");         display("",s);         System.out.println("Total Number of Anagrams = "+c);     }//input       void display(String s1, String s2)     {         if(s2.length()<=1)         {             c++;             System.out.println(s1+s2);         }         else         {         ...

Write a program to print the consecutive letters in a sentence. Both input and output      are considered in uppercase. import java.util.*; class Consecutive{     public static void main(){         Scanner sc=new Scanner(System.in);         String str,s="";         int i,l,j;         System.out.println("Enter a sentence");         str=sc.nextLine();         str=str.toUpperCase();         l=str.length();         for(i=65;i<=90;i++){             for(j=0;j<l;j++){                 if(str.charAt(j)==i){                     s=s+str.charAt(j);                     break;               ...