1. Read data from user and normalize the data using Min-Max Normalization, Z-score Normalization and Decimal Scaling Normalization

String csvFile = "D:/p1.csv";

     BufferedReader br;

     String line;

     String cvsSplitBy = ",";

        int value[] = new int [100];

        int i=0;

        int max=0;

        int min =100;

        try

        {

                br = new BufferedReader(new FileReader(csvFile));

          while ((line = br.readLine()) != null)

                {

                    value[i]=Integer.parseInt(line);

                    System.out.println(value[i]);

                    if(value[i]>=max)

                        max = value[i];

                    if(value[i]<min)

                        min = value[i];

                    i++;

          }

                br.close();

               int new_max=Integer.parseInt(jTextField1.getText());

                int new_min=Integer.parseInt(jTextField2.getText());

                float a = new_max-new_min;

                float b = max -min;

                System.out.println("Value by Min Max Normalization");

                for(int j =0;j<=i;j++)

                {

                    float V=((value[j]-min)*a/b)+new_min;

                    System.out.print(V+",");

                }

                System.out.println("\nValue by Z-score Normalization");

                int mean =find_mean(value,i);

                int var = find_variance(value,mean,i);

                double std_dev =Math.sqrt(var);

                for(int j =0;j<=i;j++)

                {

                    double V1=(value[j]-mean)/std_dev;

                    System.out.print(V1+",");

                }

                System.out.println("\nValue by Decimal Scaling Normalization");

                double k = Math.pow(10,2);

                for(int j =0;j<=i;j++)

                {

                    double V2=value[j]/k;

                    System.out.print(V2+",");

                }

        }

        catch (Exception e)

        {

            System.out.println(e);

        }

    }                                       

int find_mean(int value[],int i)

{

    int mean;

    int sum=0;

    for(int j=0;j<i;j++)

    {

        sum=sum+value[j];

    }

    mean=Math.round(sum/i);

    return mean;

}

int find_variance(int value[],int mean,int i)

{

    int var;

    int sum=0;

    int temp;

    for(int j=0;j<i;j++)

    {

        temp=value[j]-mean;

       sum= sum + temp*temp;

    }

    var=Math.round(sum/i);

    return var;

}