-->

Monday, September 21, 2015

java program for Eigenvalues

import Jama.Matrix;
import Jama.EigenvalueDecomposition;

public class Eigenvalues {
   public static void main(String[] args) {
      int N = 5;

      // create a symmetric positive definite matrix
      Matrix A = Matrix.random(N, N);
      A = A.transpose().times(A);

      // compute the spectral decomposition
      EigenvalueDecomposition e = A.eig();
      Matrix V = e.getV();
      Matrix D = e.getD();

      System.out.print("A =");
      A.print(9, 6);
      System.out.print("D =");
      D.print(9, 6);
      System.out.print("V =");
      V.print(9, 6);

      // check that V is orthogonal
      System.out.print("||V * V^T - I|| = ");
      System.out.println(V.times(V.transpose()).minus(Matrix.identity(N, N)).normInf());

      // check that A V = D V
      System.out.print("||AV - DV|| = ");
      System.out.println(A.times(V).minus(V.times(D)).normInf());
      System.out.print("Matrix is randomly choosen");
      
   }

}

Thursday, September 17, 2015

java programs for finding area ,volume,circumfrence and surface area



Write a java  program to find the sum of the series : 1+ x+ x2+x3+….
import java.util.Scanner;
class SumSeries
{
public static void main(String arg[])
{
                Scanner in = new Scanner(System.in);  
                int n;
                System.out.println("enter the nTH element ");
                n = in.nextInt();
                int i=0;
                int sum=0;
                int x;
                System.out.println("enter the power of the series");
                x = in.nextInt();
                while(i<n)
                {
                sum+=Math.pow(x,i);
                i++;
                }
                System.out.println("x="+x+"Sum of the seriees 1+x+x^2.s..="+sum);
}
}
          -------------------------------------------------------------------------------------------------------------------------------
     Write a java program to define a class called Cone and find its area and volume. The area and volume of the cone are evaluated using the formula:
Slant height = sqrt( r 2+h2) , volume = (1/ 3) .pi r 2 h, area = pi. r .sqrt( r 2+h2) .
-----------------------------------------------------------------------------------------------------------------
import java.util.Scanner;
public class Cone
{
            public static void main(String[] args)    
        {  
        double pi = 3.145;
        Scanner in = new Scanner(System.in);
        System.out.println("Enter the radius: ");
        double radius = in.nextDouble();
        System.out.print("Enter the height: ");
        double height = in.nextDouble();
        double slheight;
        double volume;
        double area;
        slheight = Math.sqrt(radius*radius + (height*height));
        volume = (pi*radius*radius*height)/3;
        area = (pi*radius*Math.sqrt(radius*radius+height*height));
        System.out.println("slantheight =is" + slheight);
        System.out.println("volume is = " +volume);
        System.out.println("Area is =" + area);
            }
}
------------------------------------------------------------------------------------------------------------------
   Write a java program to read 2 sides (float values) and included angle value (theta: radian of float type) of a triangle. Find the area of the triangle.
 -------------------------------------------------------------------------------------------------------------
//Thu 17 Sep 2015 16:01:11 IST coded by clinton
import java.util.Scanner;
class AreaTriangle
{
   public static void main(String args[])
   {
                Scanner in = new Scanner(System.in);
              System.out.println("Enter the value of 1st side: ");
              float a = in.nextFloat();
                System.out.println("Enter the value of 2ed side");
                float b = in.nextFloat();
                System.out.println("Enter the value of angle");
                float teta= in.nextFloat();            
                double area = ( 0.5*(a*b*(Math.sin(teta))));
                System.out.println("The Area of a Triangle is: "+area);
   }
}

Write a java program to find the volume and surface area of a cylinder by accepting its radius and height.
------------------------------------------------------------------------------------------------------------
//Thu 17 Sep 2015 15:31:55 IST  coded by clinton.m.u
import java.util.Scanner;
class VolCyli
{
   public static void main(String args[])
   {
                Scanner in = new Scanner(System.in);
              System.out.println("Enter the radius: ");
              double radius = in.nextDouble();
                System.out.println("Enter the hight");
                double hight = in.nextDouble();
                double surface_area = (2*(Math.PI *radius*hight))+(2*(Math.PI*radius*radius));
                System.out.println("The Surface area of a clylinder is: " + surface_area);
                double volume = (Math.PI*radius*radius*hight);            
              System.out.println( "The voulme of the clylinder is:"+volume) ;
   }
}
 ------------------------------------------------------------------------------------------------------------
   Write a program to find the area and volume of the sphere by accepting the radius.
---------------------------------------------------------------------------------------------------
//Thu 17 Sep 2015 15:49:35 IST  coded by clinton
import java.util.Scanner;
class VolSphere
{
   public static void main(String args[])
   {
            Scanner in = new Scanner(System.in);
             System.out.println("Enter the radius: ");
            double radius = in.nextDouble();
            double area = (4*(Math.PI*radius*radius));
            System.out.println("The  area of a sphere is: " + area);
            double volume = ((4/3)*Math.PI*radius*radius*radius);     
             System.out.println( "The voulme of the sphere is:"+volume) ;
   }
}


Write a java program to find the area and circumference of the circle by accepting the values for radius of the circle.

//Thu 17 Sep 2015 11:36:01 IST coded by clinton.m.u
import java.util.Scanner;
class CircleCircum
{
   public static void main(String args[])
   {
                Scanner in = new Scanner(System.in);
              System.out.print("Enter the radius: ");
              double radius = in.nextDouble();
                double area = Math.PI * (radius * radius);
                System.out.println("The area of circle is: " + area);
              double circumference= Math.PI * 2*radius;
              System.out.println( "The circumference of the circle is:"+circumference) ;
   }
}
 Write a java program to accept more than one string and arrange them in alphabetical order.
         –----------------------------------------------------------------------------------------------------------
         import java.util.Scanner;
public class Alphabetical_Order
{
            public static void main(String[] args)
        {
            int n;
            String temp;
            Scanner s = new Scanner(System.in);
            System.out.print("Enter number of words you want to enter:");
            n = s.nextInt();
            String words[] = new String[n];
            Scanner s1 = new Scanner(System.in);
            System.out.println("please Enter all the words:");
            for(int i = 0; i < n; i++)
            {
                words[i] = s1.nextLine();
            }
            for (int i = 0; i < n; i++)
            {
                for (int j = i + 1; j < n; j++)
                {
                    if (words[i].compareTo(words[j])>0)
                    {
                        temp = words[i];
                        words[i] = words[j];
                        words[j] = temp;
                    }
                }
            }
            System.out.println("Words in Sorted Order:");
            for (int i = 0; i < n - 1; i++)
            {
                System.out.print0(words[i] + ",");
            }
            System.out.println(words[n - 1]);
                System.out.println();
        }
}

JavaScript Free Code