Conversion.java

/**
* @Author: ESSARE AYOUB
* Conversion Class 
* Convert from Bin to Dec - Oct - Hex
*/
import java.util.*;
public class Conversion {


	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int input = 0;
		System.out.println(" ||Chose an Operation:");
		System.out.println(" ||==> 1) Octal To Binary");
		System.out.println(" ||==> 2) Decimal To Binary");
		System.out.println(" ||==> 3) Hexa To Binary");
		System.out.println(" ||==> 4) From Binary To all");
		System.out.print(" Your Choice: ");
		Scanner scn = new Scanner(System.in);
		try {
	    input = scn.nextInt();
	    
		if ( input == 1){
			System.out.println("+============================+");
			System.out.println("| Octal To Binary Operation |");
			System.out.println("+============================+");
			// Analyzing Input
			OctToBinInput();
			scn.close();
			
		} else if ( input == 2 ){
			System.out.println("+============================+");
			System.out.println("| decimal To Binary Operation |");
			System.out.println("+============================+");
			// Analyzing Input
			DecToBinInput();
			scn.close();
			
		} else if ( input == 3 ) {
			System.out.println("+==========================+");
			System.out.println("| Hexa To Binary Operation |");
			System.out.println("+==========================+");
			// Analyzing Input
			HexToBinInput();
			scn.close();
			
		} else if ( input == 4 ) {
			System.out.println("+=====================+");
			System.out.println("| From Binary To All  |");
			System.out.println("+=====================+");
			// Analyzing Input
			FromBinToAllInput();
			scn.close();
			
		} else {
			System.out.println("Invalid number! Please try Again");
			AnotherOperation();
		}
		} catch (InputMismatchException e) {
			System.out.println("Invalid number! Please try Again");
			AnotherOperation();
		}
		
		
		}
		public static void OctToBinInput(){
			Scanner input = new Scanner(System.in);
			System.out.print("Enter octal number: ");
			String oct  = input.next();
			OctalToBin(oct);
			input.close();
			
		}
		
		public static void DecToBinInput(){
			Scanner input = new Scanner(System.in);
			System.out.print("Enter Decimal number: ");
			String dec  = input.next();
			DecimalToBin(dec);
			input.close();
			
		}
		
		public static void HexToBinInput(){
			Scanner input = new Scanner(System.in);
			System.out.print("Enter Hexa number: ");
			String hex  = input.next();
			HexaToBin(hex);
			input.close();
			
		}
		
		public static void FromBinToAllInput(){
			Scanner input = new Scanner(System.in);
			System.out.print("Enter Binary number: ");
			String bin  = input.next();
			FromBinToAll(bin);
			input.close();
			
		}
		
		
	

	 public static int OctalToBin(String octalNumber){
		 String binary = "";
		 for(int j = 0; j < octalNumber.length(); j++) { 
				char num = octalNumber.charAt(j);           
				num -= '0';     
				if(num<0||num>7) {          
					System.out.println("Invalid octal number! (<7 digits) Please try again.");
					OctToBinInput();
					return -1;
				} 
				try {
				binary = Integer.toBinaryString(Integer.parseInt(octalNumber));
				} catch (NumberFormatException e){
					System.out.println("Number format is wrong! Please try again.");
					OctToBinInput();
				}
		 
	 }
		 System.out.println(" Binary of " +octalNumber+ " is: " +binary);
		 BinToOct(binary);
		 BinToDec(binary);
		 BinToHex(binary);
		 return 1;
	 }
	 
	 
	 
	 public static int DecimalToBin(String decimalNumber){
		 String binary = "";
		 for(int j = 0; j < decimalNumber.length(); j++) { 
				char num = decimalNumber.charAt(j);           
				num -= '0';     
				if(num<0||num>9) {          
					System.out.println("Invalid Decimal number! Please try again.");
					DecToBinInput();
					return -1;
				} 
				try {
				binary = Integer.toBinaryString(Integer.parseInt(decimalNumber));
				} catch (NumberFormatException e){
					System.out.println("Number format is wrong! Please try again.");
					DecToBinInput();
				}
		 
	 }
		 System.out.println(" Binary of " +decimalNumber+ " is: " +binary);
		 BinToDec(binary);
		 BinToOct(binary);
		 BinToHex(binary);
		 return 1;
	 }
	 
	 
	 public static int HexaToBin(String hexaNumber){
		 String binary = "";
		 for(int j = 0; j < hexaNumber.length(); j++) { 
			//	char num = hexaNumber.charAt(j);           
				//num -= '0'; 
				if (isHexadecimal(hexaNumber)){
					int i = Integer.parseInt(hexaNumber, 16);
				    binary = Integer.toBinaryString(i);
				}
				else {        
					System.out.println("Invalid Hexa number! Please try again.");
					HexToBinInput();
					return -1;
				} 
				
				
	 }
		 System.out.println(" Binary of " +hexaNumber+ " is: " +binary);
		 BinToDec(binary);
		 BinToOct(binary);
		 BinToHex(binary);
		 return 1;
	 }
	 
	 public static boolean isHexadecimal(String text) {
		    text = text.trim();

		    char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
		            'a', 'b', 'c', 'd', 'e', 'f', 'A', 'B', 'C', 'D', 'E', 'F' };

		    int hexDigitsCount = 0;

		    for (char symbol : text.toCharArray()) {
		        for (char hexDigit : hexDigits) {
		            if (symbol == hexDigit) {
		                hexDigitsCount++;
		                break;
		            }
		        }
		    }

		    return true ? hexDigitsCount == text.length() : false;
		}
	 
	 
	 public static long BinToDec(String bin){
		 long decimalValue = 0;
		 decimalValue = Long.parseLong(bin, 2);
		 System.out.println("+=====================+");
		 System.out.println("| Decimal: "+Long.toString(decimalValue));
		// System.out.println("+=====================+");
		 return decimalValue;
	 }
	 
	 public static long BinToOct(String bin){
		 long octalValue = 0;
		 octalValue = Long.parseLong(bin, 2);
		 System.out.println("+=====================+");
		 System.out.println("| Octal:   "+Long.toOctalString(octalValue));
	//	 System.out.println("+=====================+");
		 return octalValue;
	 }
	 
	 public static long BinToHex(String bin){
		 int hex = 0;
		 int decimal = Integer.parseInt(bin,2);
		 String hexStr = Integer.toString(decimal,16);
		 System.out.println("+=====================+");
		 System.out.println("| Hex:    "+(hexStr));
		 System.out.println("+=====================+");
		 AskForAnotherOper();
		 return hex;
	 }
	 
	 public static void AnotherOperation(){
		 int input = 0;
			System.out.println("\n ||Chose an Operation:");
			System.out.println(" ||==> 1) Octal To Binary");
			System.out.println(" ||==> 2) Decimal To Binary");
			System.out.println(" ||==> 3) Hexa To Binary");
			System.out.println(" ||==> 4) From Binary To all");
			System.out.print(" Your Choice: ");
			Scanner scn = new Scanner(System.in);
			try {
		    input = scn.nextInt();
		    
			if ( input == 1){
				System.out.println("+============================+");
				System.out.println("| Octal To Binary Operation |");
				System.out.println("+============================+");
				// Analyzing Input
				OctToBinInput();
				scn.close();
				
			} else if ( input == 2 ){
				System.out.println("+============================+");
				System.out.println("| decimal To Binary Operation |");
				System.out.println("+============================+");
				// Analyzing Input
				DecToBinInput();
				scn.close();
				
			} else if ( input == 3 ) {
				System.out.println("+==========================+");
				System.out.println("| Hexa To Binary Operation |");
				System.out.println("+==========================+");
				// Analyzing Input
				HexToBinInput();
				scn.close();
				
			} else if ( input == 4 ) {
				System.out.println("+=====================+");
				System.out.println("| From Binary To All  |");
				System.out.println("+=====================+");
				// Analyzing Input
				FromBinToAllInput();
				scn.close();
				
			} else {
				System.out.println("Invalid number! Please try Again");
				AnotherOperation();
			}
			} catch (InputMismatchException e) {
				System.out.println("Invalid number! Please try Again");
				AnotherOperation();
			}
			
			
			
			
}
	 
	 public static void AskForAnotherOper(){
		 System.out.println("Calculate Another Operation [Y/n] ?");
		 Scanner anotherInputScan = new Scanner(System.in);
		 String anotherInput = anotherInputScan.next();
		 if (anotherInput.equals("Y") || anotherInput.equals("y") || anotherInput.equals("Yes") || anotherInput.equals("YES") || anotherInput.equals("yes")){
		 AnotherOperation();
		 } else if (anotherInput.equals("n") || anotherInput.equals("N") || anotherInput.equals("no") || anotherInput.equals("NO")) {
			System.out.println("All Done! Thank you for using me :) ");  
		 } else {
			 System.out.println("Invalid response! Please try again.");  
			 AskForAnotherOper();
		 }
		 anotherInputScan.close();
	 }
	 public static void FromBinToAll(String bin){
		 try {
		 BinToDec(bin);
		 BinToOct(bin);
		 BinToHex(bin);
		 } catch (NumberFormatException e){
			 System.out.println("Invalid Binary number! Please try again."); 
			 FromBinToAllInput();
		 }
		 
	 }

}