August 2012: C & C++, Java, PL/SQL Programming Language

Monday 27 August 2012

Java Program that explain the Gregorian calendar class and display current year, current month, current date and also test if is a leap year or not.

Program

import java.util.*;
class grCalander
{
public static void main(String args[])
{
GregorianCalendar gc = new GregorianCalendar();
int year= gc.get(Calendar.YEAR);
System.out.println(year);
System.out.println(gc.isLeapYear(year));
System.out.println("Month:"+gc.get(Calendar.MONTH));
System.out.println("Week of Year:"+gc.get(Calendar.WEEK_OF_YEAR)); System.out.println("Week of Month:"+gc.get(Calendar.WEEK_OF_MONTH));
System.out.println("Day of year:"+gc.get(Calendar.DAY_OF_YEAR));
System.out.println("Day of week:"+gc.get(Calendar.DAY_OF_WEEK));
}
}

Java Program that add n or 100 number of days to the current date & display new date & time

Program

import java.util.*;
class Add100days
{
public static void main(String args[])
{
Date date=new Date();
long msec=date.getTime();
msec+=100*24*60*60*1000L;
date.setTime(msec);
System.out.println(date)
}
}

Java Program that generate 30 random numbers, Write java code to generate random numbers

Program
import java.util.*;
class randomnos
{
public static void main(String args[])
{
Random R = new Random();
for(int i=0;i<30;i++)
System.out.println(R.nextInt()%30);
}
}

Java Program that generates custom exception or user define exception, Write a java code to illustrate custom exception or user define exception

Program
class negativeArgExc
{
public static void main(String args[])throws NegativeArgumentException
{
int i;
i=Integer.parseInt(args[0]);
if (i<0)
throw new NegativeArgumentException("Negative Commandline Argument");
}
}
class NegativeArgumentException extends Exception
{
public NegativeArgumentException(String str)
{
super(str);
}
}

Java Program to explain different methods of catch class

Program
class catchMethod
{
public static void main(String args[])
{
int i,j,ans;
i=1;
j=0;
try
{
ans=i/j;
System.out.println("Ans is:"+ans);
}
catch(ArithmeticException e)
{
System.out.println("filIn: " + e.fillInStackTrace());
System.out.println("cause: " + e.getCause());
System.out.print("trace: ");
e.printStackTrace();
System.out.println("messa: " + e.getMessage());
}

}
}

Java Program to explain the concept of throw clause

Program
class throwClause
{
public static void main(String args[]) throws Exception
{
int no=24,i,quot;
for(i=0;i<=5;i++)
{
try
{
quot=no/(i-2);
System.out.println("Quotient:"+quot);
}
catch(ArithmeticException e)
{
System.out.println("Exception Occure at i:"+i);
}
}
}
}

Java Program to explain Super Keyword, write a program in java using super keyword through extend class of class inheritance

Program
class base
{
int i;
base(int a)
{
i=a;
}
void show()
{
System.out.println("Base:"+i);
}

}
class derived extends base
{
int i,j;
derived(int a,int b,int c)
{
super(a);
i=b;
j=c;
}
void show()
{
super.show();
System.out.println("Base i:"+super.i);
System.out.println("Derived i:"+i);
System.out.println("Derived j:"+i);
}

}
class superEx
{
public static void main(String args[])
{
derived d = new derived(10,20,30);
d.show();
}
}

Java Program to explain Method Modifier using Extend Class & Abstract Class

Program
abstract class A
{
int a;
public abstract void show();
}
class B extends A
{
int b,c;
B(int i,int j,int k)
{
a=i;
b=j;
c=k;
}
public void show()
{
System.out.println("a="+a);
System.out.println("b="+b);
System.out.println("c="+c);
}
final void disp()
{
System.out.println("Inside B Class Final Method");
}
}
class C extends B
{
static int i=10;
C(int i,int j,int k)
{
super(i,j,k);
}
public static void prt()
{
i=i*100;
System.out.println("Static Method:"+i);
}
private void display()
{
System.out.println("Private Method");
}
protected void msg()
{
System.out.println("Proctected Method");
}
/* void disp()
{
System.out.println("Final");
} Not Possible bcoz it is declared as final in the base class*/
}
class Methodmodi
{
public static void main(String args[])
{
B b = new B(10,20,30);
C c= new C(10,20,30);
c.show();
C.prt();
//c.display();Not possible bcoz it is private
c.msg();
c.disp();
}
}

Java Program to illustrate Variable modifier like Public, Private, Protected, Java code to explain any three modifier

Program
class var
{
public int a;
final int b=24;
static int c;
private int d;
protected int e;

public void show()
{
System.out.println("Public:"+a);
System.out.println("Private:"+d);
System.out.println("Protected"+e);
System.out.println("Final:"+b);
System.out.println("Static:"+c);
}
}
class variablemodi
{
public static void main(String args[])
{
var v=new var();

v.a=10;
//v.d=20; bcoz it is private variable cant access outside the class
v.e=30;
//v.b=40; bcoz it is final variable so it is constant
var.c=50;
v.show();
}
}

Java Program to find area of circle using Final Class, Write a java program to find area of circle using final keyword

Program
final class Fincircle
{
double area;
double radius;
final double PHI=22.0/7.0;
Fincircle(double r)
{
radius =r;
}
double Area()
{
area=PHI*radius*radius;
return area;
}
}
class finalcls
{
public static void main(String args[])
{
double ar;
Fincircle F=new Fincircle(3.5);
ar=F.Area();
System.out.println("Area of Circle is:"+ar);
}
}

Java Program to find area of Rectangle & circle using Abstract Class, Write a program in java explaining program Abstract Class, class modifiers

Program
/* This is a example of Abstract Class */
abstract class shape
{
double area;
final double PHI=22.0/7.0;
abstract double Area();
}
class Rectangle extends shape
{
double length,breadth;
Rectangle(double x,double y)
{
length=x;
breadth=y;
}
double Area()
{
area=length*breadth;
return area;
}
}
class Circle extends shape
{
double radious;
Circle(double r)
{
radious=r;
}
double Area()
{
area=PHI*radious*radious;
return area;
}
}
class Abscls
{
public static void main(String args[])
{
Rectangle rec=new Rectangle (6.0,4.0);
double ar;
ar=rec.Area();
System.out.println("Area of Ractangle is:"+ar);
Circle cir = new Circle(5.25);
ar=cir.Area();
System.out.println("Area of Circle is:"+ar);
}
}

Saturday 25 August 2012

Java Program for Matrix Multiplication, Write a program in java language for Matrix Multiplication

Program
class multi
{
public static void main(String args[])
{
int k=1;
int arr[][],arr2[][],arr3[][];

arr= new int[3][3];
arr2=new int[3][3];
arr3=new int[3][3];

for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
arr[i][j]=k;
arr2[i][j]=++k;
k++;
}

}
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
for(int p=0;p<3;p++)
{
arr3[i][j]+=arr[i][p]*arr2[p][j];
}

}
}

for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
System.out.print(" "+arr[i][j]);
}
System.out.println();

}
System.out.println();
System.out.println();

for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
System.out.print(" "+arr2[i][j]);
}
System.out.println();
}
System.out.println();
System.out.println();
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
System.out.print(" "+arr3[i][j]);
}
System.out.println();
}
}
}

Java Program for printing pyramid of 10 numbers, Write a java program that display pyramid of 10 numbers

Program
class pyramid
{
public static void main(String args[])
{
for(int i=1;i<=10;i++)
{
for(int s=20;s>=i;s--)
{
System.out.print(" ");
}
for(int j=1;j<=i;j++)
{
System.out.print(" "+j+" ");
}
System.out.println();
}
}
}

Java Program to find square root and power, Write a java program that finds square root and power

Program
class powsq
{
public static void main(String args[])
{
int i=Integer.parseInt(args[0]);
int j=Integer.parseInt(args[1]);

double sq=Math.sqrt(i);
double pw=Math.pow(i,j);

System.out.println("Square root is:"+sq);
System.out.println("Power is:"+pw);
}
}

Java Program for wrapper class. Write a java program for using any five methods for wrapper class.

Program
class Wrappercls
{
public static void main(String args[])
{
double no1=0;
double no2=0;
double no3=no1/no2;
System.out.println("no3:"+no3);
System.out.println("isInfinite:"+Double.isInfinite(no3));
System.out.println("isNaN:"+Double.isNaN(no3));
System.out.println("Max Value:"+Double.MAX_VALUE);
System.out.println("Min Value:"+Double.MIN_VALUE);
System.out.println("Positive Infinity:" + Double.POSITIVE_INFINITY);
System.out.println("Negative Infinity: " + Double.NEGATIVE_INFINITY);
}
}

Java Program to find Radius of a circle, Write a java Program that finds a radius using this variable

Program
class radius
{
double pie,area,r;
radious(double p,double a)
{
this.pie=p;
this.area=a;
}
void calculate()
{
r=(area/(2*pie));
System.out.println("Radius of circle is: "+r);
}
}
class Test
{
public static void main(String args[])
{
radius rd=new radius(3.14,22.24);
rd.calculate();
}
}

Java Program to perform Stack operations like Push, Pop, Peep, Change, Write a java Program for stack using constructor, define methods with parameter etc

Program
class stack
{
int stck[] = new int[10];
int top;

stack() //Default Constructor
{
top=-1;
}
void push(int item)
{
if(top==9)
System.out.println("Stack is Overflow");
else
top++;
stck[top]=item;
}
int pop()
{
if(top<0)
{
System.out.println("Stack is Underflow");
return 0;
}
else
{
return stck[top--];
}
}
void peep(int l)
{
if(top-l+1<=0)
System.out.println("Stack Underflow");
else
System.out.println(" The value of "+l+" location in stack::"+stck[top-l+1]);
}
void change(int l,int x)
{
if(top-l+1<=0)
System.out.println("Stack Underflow");
else
stck[top-l+1]=x;
}
}

class MyStack
{
public static void main(String args[])
{
stack Mystack1 = new stack();
stack Mystack2 = new stack();
//Push
for(int i=0;i<10;i++)
Mystack1.push(i);
for(int i=10;i<20;i++)
Mystack2.push(i);

//Peep Operation
Mystack1.peep(5);
Mystack2.peep(4);

//Change Operation
Mystack1.change(5,25);
Mystack2.change(4,50);

//Peep Operation
Mystack1.peep(5);
Mystack2.peep(4);

//Pop
System.out.println("Stack in Mystack1");
for(int i=0;i<10;i++)
System.out.println(Mystack1.pop());

System.out.println("Stack in Mystack2");
for(int i=0;i<10;i++)
System.out.println(Mystack2.pop());
}
}

Java Program that illustrate StringBuffer class & using different method like append, insert, capacity, lenth, charat etc.

Program
class stBuffercls
{
public static void main(String args[])
{
StringBuffer sb = new StringBuffer("Delhi");

//Length
System.out.println("Length of Buffer String:"+sb.length());
//Capacity
System.out.println("Capacity of Buffer String:"+sb.capacity());
//charAt
System.out.println("CharAt(3) from Buffer String:"+sb.charAt(3));
//Append
System.out.println("String After Append Operation:"+ sb.append(" Hai Meri Jaan"));
//Insert
sb.insert(0,"Yeh ");
System.out.println("String After insert operation:"+ sb);
}
}

Java Program that illustrate String class using different methods like equal, compareTo, replace, lowercase, uppercase, concat, valueof, indedof etc.

Program
class StCls
{
public static void main(String args[])
{
String str1="I Love My India";
String str2=new String("I Love My India");
String str3="I Love My India";
String str4="Teach";
String str5="YourSelf";
StringBuffer sb=new StringBuffer("I Love My India");
System.out.println("str1==str2:"+ (str1==str2));
System.out.println("str1==str3:"+ (str1==str3));
int result = str1.compareTo(str2);
if (result < 0)
System.out.println(str1 + " is less than " + str2);
else if (result == 0)
System.out.println(str1 +" is equal to " + str2);
else
System.out.println(str1 +" is greater than " + str2);
//Concat
String str6=str4.concat(str5);
System.out.println("Concated String is: "+ str6);
//Replace
System.out.println("String After Replace:"+ sb.replace(10,16,"Country"));
//Lowercase
String lower=str4.toLowerCase();
System.out.println("String After Conversion:"+ lower);
//Uppercase
String upper=str4.toUpperCase();
System.out.println("String After Conversion:"+ upper);
int i=str4.indexOf("c");
System.out.println("The Index of c is :"+i);
}
}

Java Program that perform type conversion like int to byte, double to int, double to byte etc.( other possible types)

Program
class conversion
{
public static void main(String[] args)
{
byte b;
int i=123;
double d=121.212;
System.out.println("\nConversion of int to byte");
b=(byte)i;
System.out.println("i= " + i + " b= " + b);

System.out.println("\nConversion of double to int");
i=(int)d;
System.out.println("d= " + d +" i= "+i);

System.out.println("\nConversion of double to byte");
b=(byte)d;
System.out.println("d= " + d + " b= " + b);

//The type promotion rules.....

byte b1=11;
char c1='a';
short s1=256;
int i1=4000;
float f1=1.24f;
double d1=0.123;

double result=(f1*b1)+(i1/c1)-(d1*s1);
System.out.println((f1*b1)+ " + " + (i1/c1) + " - " + (d1*s1));
System.out.println("Result-->" + result);
}
}

Java Program to find Prime Number, Write a program in Java Language to find a twin prime numbers.

Program
class prime
{
public static void main(String args[])
{
Logic L=new Logic(); // Create instance of Logic class
L.findprime();
}
}
class Logic
{
public void findprime()
{
int i,j,flag;
flag=0;
System.out.println("Twin Prime Numbers are.......");
for(i=1;i<100;i=i+2) // Logic to find First prime number
{
flag=0;

for(j=2;j<i-1;j++)
{
if( i % j == 0 )
{
flag = 1;
break;
}
}
if (flag == 0) // to find number is twin prime or not
{
for(j=2;j<(i+2)-1;j++)
{
if((i+2) % j == 0 )
{
flag = 1;
break;
}
}
if (flag == 0)
{
System.out.println(i + " " + (i+2));
}
}
}
}
}

Java Program to swap 2 numbers without using third variable, Write a program in Java for swapping values of two variable without using temporary variable

Program
class swapping
{
public static void main(String args[])
{
int no1,no2;
no1 = Integer.parseInt(args[0]);
no2 = Integer.parseInt(args[1]);
Logic L=new Logic();
L.swapping(no1,no2);
}
}
class Logic
{
public void swapping(int n1,int n2)
{
System.out.println("Before Swapping......");
System.out.println("No1 is: " + n1);
System.out.println("No2 is: " + n2);

n1 = n1+ n2; // Logic
n2 = n1 - n2;
n1 = n1 - n2;

System.out.println("After Swapping......");
System.out.println("No1 is: " + n1);
System.out.println("No2 is: " + n2);

}

}

Java Program to swap 2 numbers using third variable, Write an application for swapping values of two variable using third variable

Program
class swap
{
public static void main(String args[])
{
int no1,no2;
no1 = Integer.parseInt(args[0]);
no2 = Integer.parseInt(args[1]);
Logic L=new Logic();
L.swapping(no1,no2);
}
}
class Logic
{
public void swapping(int n1,int n2)
{
int t; //Third Variable

System.out.println("No1 is : " + n1);
System.out.println("No2 is: " + n2);

t = n1;
n1 = n2;
n2 = t;

System.out.println("After Swapping..........");
System.out.println("No1 is : " + n1);
System.out.println("No2 is: " + n2);
}
}

Java Program to find Max & Min number, Write a program in Java Language to find maximum & minimum numbers

Java Program to find Max & Min number, Write a program in Java Language to find maximum & minimum numbers

Program
class maxmin
{
public static void main(String args[])
{
int no1,no2,ans;
no1 = Integer.parseInt(args[0]);
no2 = Integer.parseInt(args[1]);
Logic L=new Logic();
ans=L.find(no1,no2);
if (ans == no1)
System.out.println("No1 Is Greater Than No2...." );
else
System.out.println("No2 Is Greater Than No1...." );

}
}
class Logic
{
public int find(int n1, int n2)
{
return( n1 > n2 ? n1 : n2); // Conditional Operator
}
}

Java Program to find Factorial Using Recursion, Write a program in Java language for an an application to find factorial using recursion

Java Program to find Factorial Using Recursion, Write a program in Java language for an an application to find factorial using recursion

Program
class facto
{
public static void main(String args[])
{
int no,f;
no = Integer.parseInt(args[0]);
Logic L=new Logic();
f=L.fact(no);
System.out.println("Factorial of " + no + " is " + f);
}
}
class Logic
{
public int fact(int n)
{
if(n==1)
return 1;
else
{
return n*fact(n-1); //Recursion
}

}
}

Java Program to find Factorial, Write a Java Program for an application to find factorial

Java Program to find Factorial, Write a Java Program for an application to find factorial

Program:-
class factorial
{
public static void main(String args[])
{
int no;
no = Integer.parseInt(args[0]);
Logic L=new Logic();
L.fact(no);
}
}
class Logic
{
public void fact(int n)
{
int f,no;
no = n;
f=1;
while(no>0)
{
f = f * no;
no = no - 1;
}
System.out.println("Factorial of " + n + " is " + f);
}
}

Java Program of Fibonacci series, Write a Java program for application for Fibonacci series

Java Program of Fibonacci series, Write a Java program for application for Fibonacci series

Program:-
class fibonacci
{
public static void main(String args[])
{
int no;
no = Integer.parseInt(args[0]);
Logic L=new Logic();
L.fibo(no);
}
}
class Logic
{
public void fibo(int n)
{
int a,b,c;
a=0;
b=1;
System.out.print(a +" ");
System.out.print(b +" ");
c=1;
do //Using Do....While Loop
{
c=a+b;
System.out.print(c +" ");
a=b;
b=c;
}while(c<n);
}
}