Determinantenverfahren in Java

import java.io.*;

public classprogramm            {

         publicstatic void main(String[] args)

         {

              BufferedReader taste = new     BufferedReader(new InputStreamReader(System.in));

   try{

     System.out.println("Die CramerscheRegel");

     System.out.println();

     System.out.println();

     System.out.println("Formel:");

     System.out.println("ax + ay + az = ad");

     System.out.println("bx + by + bz = bd");

     System.out.println("cx+ cy + cz = cd");//(1)

     doubleax, bx, cx;

     double ay, by, cy;

     double az, bz, cz;

     double ad, bd, cd;

     double D, Dx, Dy, Dz;

    System.out.println();

    System.out.println();

    System.out.println("Geben Sie alle x-Werte ein ein!");

    System.out.println();

    ax = Double.parseDouble(taste.readLine());

    bx = Double.parseDouble(taste.readLine());

    cx = Double.parseDouble(taste.readLine());//(3)

    System.out.println();

    System.out.println("Geben Sie alle y-Werteein!");

    System.out.println();

    ay = Double.parseDouble(taste.readLine());

    by = Double.parseDouble(taste.readLine());

    cy = Double.parseDouble(taste.readLine());

    System.out.println();

     System.out.println("Geben Sie alle z-Werteein!");

      System.out.println();

      az = Double.parseDouble(taste.readLine());

      bz = Double.parseDouble(taste.readLine());

      cz = Double.parseDouble(taste.readLine());

      System.out.println();

      System.out.println("Geben Sie alle d-Werteein!");

      System.out.println();

      ad = Double.parseDouble(taste.readLine());

      bd = Double.parseDouble(taste.readLine());

      cd = Double.parseDouble(taste.readLine());

      System.out.println();

      System.out.println();

     D = ax * (by * cz - bz * cy) - ay * (bx *cz -          bz * cx) + az * (bx * cy - by * cx);

      System.out.println(" D = " + D);

      System.out.println();

      Dx = ad * (by * cz - bz * cy) - ay * (bd *cz     -bz * cd) + az * (bd * cy - by * cd);

      System.out.println(" Dx = " + Dx);

      System.out.println();

      Dy = ax * (bd * cz - bz * cd) - ad * (bx *cz -            bz * cx) + az * (bx * cd - bd * cx);

     System.out.println(" Dy = " + Dy);

     System.out.println();

     Dz = ax * (by * cd - bd * cy) - ay * (bx *cd -           bd * cx) + ad * (bx * cy - by * cx);//(7)

      System.out.println(" Dz = " + Dz);

      System.out.println();

      System.out.println();

      System.out.println("x = " + Dx / D);

      System.out.println();

      System.out.println("y = " + Dy / D);

      System.out.println();

      System.out.println("z = " + Dz / D);//(8)

      System.out.println();

     }catch(IOExceptione){

         System.out.println("Es gibt einen Fehler beim Einlesen");

             }

         }

     }