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");
      
   }

}

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);

}

}

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     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) .

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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);

            }

}

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   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.

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//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.

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//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) ;

   }

}

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   Write a program to find the area and volume of the sphere by accepting the radius.

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//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();

        }

}