Need help in writing a program which is a java calculator. Use only procedural constructs of the Java programming language. You may use all the following: - the Main class since, - Scanner class with all its methods for input and output, - Array and String classes with all their methods Must do conversions: Binary to hexadecimal and vice versa Arithmetic to binary and vice versa Arithmetic to hexadecimal and vice versa Please use IntelliJ idea or eclipse. I have the code already done for: Binary to decimal Decimal to binary Hexadecimal to decimal Decimal to hexadecimal Please use this and add it to your code to print out the calculator values: public static void main(String[] args) { //String binary = toBinaryString(number); Scanner input = new Scanner(System.in); System.out.println("Number Conversion in java \n"); // Display the menu System.out.println("1.\t Decimal to Binary"); System.out.println("2.\t Decimal to Hexadecimal"); System.out.println("3.\t Binary to Decimal"); System.out.println("4.\t Hexadecimal to Decimal \n"); System.out.println("Your choice?"); //Get user's choice int choice = -1; while (choice < 0 || choice > 4) { choice = input.nextInt(); switch (choice) { case1: System.out.println("\nEnter Decimal Number"); break; case2: System.out.println("\nEnter Decimal Number"); break; case3: System.out.println("\nEnter Binary"); break; case4: System.out.println("\nEnter Hexadecimal"); break; default: System.out.println("\nInvalid choice. Please choose a number between 1 and 4."); break; } } if (choice == 1) { int number = input.nextInt(); String binary = toBinaryString(number); binary = recursive(number); System.out.printf("Decimal to Binary (%d) = %s", number, binary); } else if (choice == 2) { int number2 = input.nextInt(); String hexadecimal = toHexString(number2); hexadecimal = recursiveDecHex(number2); System.out.printf("Decimal to Hexadecimal (%d) = %s ", number2, hexadecimal); } else if (choice == 3 ) { String binary2 = input.next(); int decimal = toDecimalUsingParseInt(binary2); decimal = recursiveBin(binary2); System.out.printf("\n2. Binary to decimal - recursive(%s) = %d ", binary2, decimal); } else { String hex = input.next(); int decimal = toHexUsingParseInt(hex); decimal = recursiveHexDec(hex); System.out.printf("Hexadecimal to Decimal (%s) = %d ", hex, decimal); } input.close(); } private static String toBinaryString(int number) { return Integer.toBinaryString(number); } private static String toHexString(int number) { return Integer.toHexString(number); } private static int toDecimalUsingParseInt(String binaryNumber) { return Integer.parseInt(binaryNumber, 2); } private static int toHexUsingParseInt(String number) { return Integer.parseInt(number, 16); } private static String recursive(int number) { StringBuilder builder = new StringBuilder(); if (number > 0) { String binaryNumber = recursive(number / 2); int digit = number % 2; builder.append(binaryNumber + digit); } return builder.toString(); } private static String recursiveDecHex(int number) { StringBuilder builder = new StringBuilder(); if (number > 0) { String hexNumber = recursiveDecHex(number / 16); String hexCode = "0123456789ABCDEF"; int hexDigit = number % 16; builder.append(hexNumber + hexCode.charAt(hexDigit)); } return builder.toString(); } private static int recursiveBin(String binaryNumber) { int decimal = 0; int length = binaryNumber.length(); if (length > 0) { String substring = binaryNumber.substring(1); int digit = Character.getNumericValue(binaryNumber.charAt(0)); decimal = digit * (int) Math.pow(2, length - 1) + recursiveBin(substring); } return decimal; } private static int recursiveHexDec(String hexNumber) { int decimal = 0; String hexCode = "0123456789ABCDEF"; hexNumber = hexNumber.toUpperCase(); int length = hexNumber.length(); if (length > 0) { char ch = hexNumber.charAt(0); int digit = hexCode.indexOf(ch); String substring = hexNumber.substring(1); decimal = digit * (int) Math.pow(16, length - 1) + recursiveHexDec(substring); } return decimal; } }
Need help in writing a program which is a java calculator. Use only procedural constructs of the Java programming language.
You may use all the following: - the Main class since, - Scanner class with all its methods for input and output, - Array and String classes with all their methods
Must do conversions:
- Binary to hexadecimal and vice versa
- Arithmetic to binary and vice versa
- Arithmetic to hexadecimal and vice versa
Please use IntelliJ idea or eclipse.
I have the code already done for:
- Binary to decimal
- Decimal to binary
- Hexadecimal to decimal
- Decimal to hexadecimal
Please use this and add it to your code to print out the calculator values:
public static void main(String[] args) {
//String binary = toBinaryString(number);
Scanner input = new Scanner(System.in);
System.out.println("Number Conversion in java \n");
// Display the menu
System.out.println("1.\t Decimal to Binary");
System.out.println("2.\t Decimal to Hexadecimal");
System.out.println("3.\t Binary to Decimal");
System.out.println("4.\t Hexadecimal to Decimal \n");
System.out.println("Your choice?");
//Get user's choice
int choice = -1;
while (choice < 0 || choice > 4) {
choice = input.nextInt();
switch (choice) {
case1:
System.out.println("\nEnter Decimal Number");
break;
case2:
System.out.println("\nEnter Decimal Number");
break;
case3:
System.out.println("\nEnter Binary");
break;
case4:
System.out.println("\nEnter Hexadecimal");
break;
default:
System.out.println("\nInvalid choice. Please choose a number between 1 and 4.");
break;
}
}
if (choice == 1) {
int number = input.nextInt();
String binary = toBinaryString(number);
binary = recursive(number);
System.out.printf("Decimal to Binary (%d) = %s", number, binary);
}
else if (choice == 2) {
int number2 = input.nextInt();
String hexadecimal = toHexString(number2);
hexadecimal = recursiveDecHex(number2);
System.out.printf("Decimal to Hexadecimal (%d) = %s ", number2, hexadecimal);
}
else if (choice == 3 ) {
String binary2 = input.next();
int decimal = toDecimalUsingParseInt(binary2);
decimal = recursiveBin(binary2);
System.out.printf("\n2. Binary to decimal - recursive(%s) = %d ", binary2, decimal);
} else {
String hex = input.next();
int decimal = toHexUsingParseInt(hex);
decimal = recursiveHexDec(hex);
System.out.printf("Hexadecimal to Decimal (%s) = %d ", hex, decimal);
}
input.close();
}
private static String toBinaryString(int number) {
return Integer.toBinaryString(number);
}
private static String toHexString(int number) {
return Integer.toHexString(number);
}
private static int toDecimalUsingParseInt(String binaryNumber) {
return Integer.parseInt(binaryNumber, 2);
}
private static int toHexUsingParseInt(String number) {
return Integer.parseInt(number, 16);
}
private static String recursive(int number) {
StringBuilder builder = new StringBuilder();
if (number > 0) {
String binaryNumber = recursive(number / 2);
int digit = number % 2;
builder.append(binaryNumber + digit);
}
return builder.toString();
}
private static String recursiveDecHex(int number) {
StringBuilder builder = new StringBuilder();
if (number > 0) {
String hexNumber = recursiveDecHex(number / 16);
String hexCode = "0123456789ABCDEF";
int hexDigit = number % 16;
builder.append(hexNumber + hexCode.charAt(hexDigit));
}
return builder.toString();
}
private static int recursiveBin(String binaryNumber) {
int decimal = 0;
int length = binaryNumber.length();
if (length > 0) {
String substring = binaryNumber.substring(1);
int digit = Character.getNumericValue(binaryNumber.charAt(0));
decimal = digit * (int) Math.pow(2, length - 1) + recursiveBin(substring);
}
return decimal;
}
private static int recursiveHexDec(String hexNumber) {
int decimal = 0;
String hexCode = "0123456789ABCDEF";
hexNumber = hexNumber.toUpperCase();
int length = hexNumber.length();
if (length > 0) {
char ch = hexNumber.charAt(0);
int digit = hexCode.indexOf(ch);
String substring = hexNumber.substring(1);
decimal = digit * (int) Math.pow(16, length - 1) + recursiveHexDec(substring);
}
return decimal;
}
}
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