Need help with the following java code, I have most of the code done but i have some minor problems getting the correct output and just need help revising my code and fixing it to meet the required instructions.

// Driver class

import java.util.Scanner;

import java.io.*;

public class Driver {

public static void main(String[] args) throws IOException

{

int choice;

PrintWriter pw = new PrintWriter(new FileWriter("csis.txt"));

Decimal dec = new Decimal(pw);

Binary bin = new Binary(pw);

HexaDecimal hex = new HexaDecimal(pw);

Menu menu = new Menu(pw);

do

{

menu.display();

choice = menu.getSelection();

switch (choice)

{

case 1 : dec.decToBin();

break;

case 2 : dec.decToHex();

break;

case 3 : bin.binToDec();

break;

case 4 : bin.binToHex();

break;

case 5 : hex.hexToDec();

break;

case 6 : hex.hexToBin();

break;

}

} while (choice != 7);

pw.close();

}

}

// Menu class

import java.io.*;

import java.util.*;

import java.util.Scanner;

public class Menu

{

//Declare Variable

private PrintWriter pw;

public Menu (PrintWriter pw)

{

this.pw = pw;

}

public void display()

{

//Display Conversion

System.out.println("Please Choose a Conversion: ");

System.out.println(" 1. Decimal to Binary: ");

System.out.println(" 2. Decimal to Hexadecimal: ");

System.out.println(" 3. Binary to Decimal: ");

System.out.println(" 4. Binary to Hexadecimal: ");

System.out.println(" 5. Hexadecimal to Decimal: ");

System.out.println(" 6. Hexadecimal to Binary: ");

System.out.println(" 7. Exit: ");

pw.println();

pw.println("Please Choose a Conversion: ");

pw.println(" 1. Decimal to Binary: ");

pw.println(" 2. Decimal to Hexadecimal: ");

pw.println(" 3. Binary to Decimal: ");

pw.println(" 4. Binary to Hexadecimal: ");

pw.println(" 5. Hexadecimal to Decimal: ");

pw.println(" 6. Hexadecimal to Binary: ");

pw.println();

}

public int getSelection()

{

//Create Scanner

Scanner menuClass = new Scanner(System.in);

//Declare Variable

int choice = 0;

//Display Choice

System.out.println();

System.out.println("Choice: ");

pw.println("Choice: ");

choice = menuClass.nextInt();

//Display User's Input

System.out.println();

System.out.println("You've Entered " + choice);

System.out.println();

pw.println("You've Entered " + choice);

pw.println();

return choice;

}

}

// Binary class

import java.lang.*;

import java.io.*;

import java.util.Scanner;

public class Binary

{

// Variables

private PrintWriter pw;

String hex = "";

int exp = 0;

int dec = 0;

int temp;

String inputBinToDec;

int i = 0;

public Binary (PrintWriter pw)

{

this.pw = pw;

}

public void binToDec()

{

inputBin();

toDec();

outDec();

}

public void binToHex()

{

inputBin();

toHex();

outHex();

}

private void inputBin()

{

//Declare Variables

dec = 0;

hex = "";

//Creates Scanner

Scanner inputSCB = new Scanner (System.in);

//User Enters Binary Number

System.out.println("Enter Binary Number:");

pw.println("Enter Binary Number:");

String bin = inputSCB.nextLine();

pw.print(bin);

pw.println();

inputBinToDec = bin;

//inputBinToDec = bin;

}

private void toDec()

{

int intValue;

int length = inputBinToDec.length();

int exp = inputBinToDec.length();

for (int i = 0; i

{

intValue = Character.getNumericValue(inputBinToDec.charAt(i));

dec += ((intValue)*Math.pow(2, --exp));

}// end for

}

private void outDec()

{

// Display Binary to Decimal

System.out.println();

System.out.println("Binary to Decimal: ");

System.out.println(dec + " ");

// Sends Output File to csis.text

pw.println("Binary to Decimal: ");

pw.print(dec + " ");

pw.println();

}

private void toHex()

{

// Variables

int decToHex;

int decNum;

int intValue;

int length = inputBinToDec.length();

int twoPower = inputBinToDec.length();

for (int i = 0; i

{

// Converts from String to Charcater

intValue = Character.getNumericValue(inputBinToDec.charAt(i));

dec += ((intValue)*Math.pow(2, --exp));

}

// Assign New Variables

decNum = dec;

String convHex;

while (decNum > 0)

{

// Formula to Convert Binary to Hexadecimal

decToHex = decNum % 16;

decNum = decNum / 16;

convHex = Integer.toString(decToHex);

switch (decToHex)

{

case 10: convHex = "A";

break;

case 11: convHex = "B";

break;

case 12: convHex = "C";

break;

case 13: convHex = "D";

break;

case 14: convHex = "E";

break;

case 15: convHex = "F";

break;

}

hex += convHex;

}

}

private void outHex()

{

// Display Binary to Hexadecimal

System.out.println();

System.out.println("Binary to Hexadecimal: ");

System.out.println(hex + " ");

// Sends Output File to csis.text

pw.println("Binary to Hexadecimal: ");

pw.print(hex+ " ");

pw.println();

}

}

// Decimal Class

import java.lang.*;

import java.io.*;

import java.util.Scanner;

public class Decimal

{

//Declare Variables

private PrintWriter pw;

int inputDec = 0;

int inputDecToBin;

int inputDecToHex;

String bin = " ";

String hex = " ";

public Decimal (PrintWriter pw)

{

this.pw = pw;

}

public void decToBin()

{

inputDec();

toBin();

outBin();

}

public void decToHex()

{

inputDec();

toHex();

outHex();

}

private void inputDec()

{

//Declare Variable

bin = " ";

//Create Scanner

Scanner scanner = new Scanner(System.in);

//User Enters Decimal Number

System.out.println("Please Enter a Decimal Number: ");

String dec = scanner.nextLine();

pw.println("Please Enter a Decimal Number: ");

pw.println(dec);

//Changes Back from String to Integer

inputDec = Integer.parseInt(dec);

}

private void toBin()

{

while(inputDec > 0)

{

//Formula to Convert Decimal to Binary

inputDecToBin = inputDec % 2;

inputDec = inputDec / 2;

bin += inputDecToBin;

}

}

private void outBin()

{

//Display Decimal to Binary

System.out.println();

System.out.println("Decimal to Binary: ");

System.out.println(new StringBuffer (bin).reverse().toString());

System.out.println();

//Sends Output File to csis.txt

pw.println("Decimal to Binary: ");

pw.print(new StringBuffer (bin).reverse().toString());

pw.println();

}

private void toHex()

{

//Declare Variable

hex = "";

do

{

//Formula to Convert Decimal to Binary

inputDecToHex = inputDec % 16;

if (inputDecToHex == 10)

{

hex = 'A' + hex;

}

else if (inputDecToHex == 11)

{

hex = 'B' + hex;

}

else if (inputDecToHex == 12)

{

hex = 'C' + hex;

}

else if (inputDecToHex == 13)

{

hex = 'D' + hex;

}

else if (inputDecToHex == 14)

{

hex = 'E' + hex;

}

else if (inputDecToHex == 15)

{

hex = 'F' + hex;

}

else

{

hex = Integer.toString(inputDec % 16) + hex;

}

inputDec = inputDec / 16;

}while (inputDec > 0);

}

private void outHex()

{

//Display Decimal to Hexadecimal

System.out.println();

System.out.println("Decimal to Hexadecimal: ");

System.out.println(new StringBuffer(hex).reverse() + " ");

//Sends Output File to csis.text

pw.println("Decimal to Hexadecimal: ");

pw.print(new StringBuffer(hex).reverse()+" ");

pw.println();

//Closes the Output File

//pw.close();

}

}

// HexaDecimal Class

import java.lang.*;

import java.io.*;

import java.util.Scanner;

public class HexaDecimal

{

// Declare Variables

private PrintWriter pw;

int dec = 0;

String hexadecimal = "";

String bin = "";

String inputHex;

String inputBinToHex = "";

public HexaDecimal (PrintWriter pw)

{

this.pw = pw;

}

public void hexToDec()

{

inputHex();

toDec();

outDec();

}

public void hexToBin()

{

inputHex();

toBin();

outBin();

}

private void inputHex()

{

//Creates Scanner

Scanner inputHex = new Scanner(System.in);

// User Enters Hexadecimal Number

System.out.println("Please Enter a Hexadecimal Number:" );

hexadecimal = inputHex.nextLine();

// Sends OutputFile to the csis.txt

pw.println("Please Enter a Hexadecimal: ");

pw.println(hexadecimal);

}

private void toDec()

{

// Declare Variables

int h = hexadecimal.length() - 1;

int n = 0;

for(int i=0; i

{

char ch= hexadecimal.charAt(i);

switch(ch)

{

case '1': n=1;

break;

case '2': n=2;

break;

case '3': n=3;

break;

case '4': n=4;

break;

case '5': n=5;

break;

case '6': n=6;

break;

case '7': n=7;

break;

case '8': n=8;

break;

case '9': n=9;

break;

case 'A': n=10;

break;

case 'B': n=11;

break;

case 'C': n=12;

break;

case 'D': n=13;

break;

case 'E': n=14;

break;

case 'F':n=15;

break;

}

// Formula to Convert Hexadecimal to Decimal

dec = (int)(n*(Math.pow(16,h))) + (int)dec;

h--;

}

}

private void outDec()

{

// Display the Hexadecimal to Decimal

System.out.println();

System.out.println("Hexadecimal to Decimal: ");

pw.println("Hexadecimal to Decimal: ");

System.out.println(dec+" ");

pw.print(dec+" ");

pw.println();

}

//Converts the hexadecimal value to a decimal number

private void toBin()

{

//Declare Variables

int intValue = 0;

double intPreFinal = 0;

double intFinal;

int Binary = 0;

int PreFinal = 0;

int hex;

bin = "";

int intStringLength = hexadecimal.length();

int exp = intStringLength;

for (int i = 0; i

{

// Converts from String to Integer

hex = Integer.parseInt(""+hexadecimal.charAt(i),16);

// Formula to Convert from Hexadecimal to Binary

intValue = Character.getNumericValue(hexadecimal.charAt(i));

intPreFinal = intPreFinal + ((intValue)*Math.pow(16, --exp));

}

// Assigning New Variables

intFinal = intPreFinal;

int intTest = (int)intPreFinal;

double grand = intTest;

int j = 0;

for(int i = 0;intTest >= Math.pow(2,i);i++)

{

j = i;

}

for(;j >= 0;j--)

{

Binary = 0;

// Reverses the Order

if (grand >= Math.pow(2,j))

Binary = 1;

grand = grand - Math.pow(2,j) * Binary;

bin += Integer.toString(Binary);

}

}

private void outBin()

{

// Display Hexadecimal to Binary

System.out.println();

System.out.println("Hexadecimal to Binary: ");

System.out.println(bin + " ");

// Sends Output File to csis.text

pw.println("Hexadecimal to Binary: ");

pw.print(bin+ " ");

pw.println();

// Close Output File

pw.close();

}

}

Computer Lab: Number Systems Construct an object-oriented Java program that performs each of the following conversions. Note that we're only dealing with non-negative numbers. Converts a decimal integer into a 32-bit binary number Converts a decimal integer into an 8-digit hexadecimal number Converts a 32-bit binary number into a decimal integer Converts a 32-bit binary number into an 8-digit hexadecimal number Converts an 8-digit hexadecimal number into a decimal integer Converts an 8-digit hexadecimal number into a 32-bit binary number ram should be interactive, requiring the user to select the appropriate Your progr option from a menu of options (no GUI required). Note that Java's Scanner class will be very helpful reading data from the keyboard. The conversions you code must be direct. In other words, if you had to convert a base 2 number into base 16, the conversion should be made directly from base 2 to base 16 and not from base 2 to base 10 to base 16. You may not use any methods or utilities from the Java library that do the conversions for you, such as: Integer.toBinaryString () Integer.toHexString () Your program should send all output to a file called csis.txt. This output file will be submitted along with your source code for the lab. All information displayed in the terminal window, including input from the user, should also be sent to the output file