Write a recursive method that converts a positive decimal number to into a binary number as a string. The method header is: String decimalToBinary(int value) //Note: Print empty string ", if value is negative or zero. Input 2 Output 10
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***********************Answer question below:******
Write code in Java:
- Make sure code is recursive.
- Do not change code other than where it says you can.
import java.util.*;
import java.lang.*;
import java.io.*;
class DecimalToBinary {
public static String decimalToBinary(int value) {
//*Code goes here*
}
}
class DriverMain {
public static void main(String args[]) {
Scanner input = new Scanner(System.in);
System.out.print(DecimalToBinary.decimalToBinary(input.nextInt()));
}
}
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- Write a recursive method that converts a decimal number intoa hex number as a string. The method header ispublic static String dec2Hex(int value)Write a test program that prompts the user to enter a decimal number and displaysits hex equivalent.Write a recursive method that parses a binary number as astring into a decimal integer. The method header is public static int bin2Dec(String binaryString) Write a test program that prompts the user to enter a binary string and displaysits decimal equivalent.Given a long string use recursion to traverse the string and replace every vowel (A,E,I,O,U) with an @ sign. You cannot change the method header. public String encodeVowels(String s){ // Your code here }
- If your first name starts with a letter from A-J inclusively: Write a recursive method that takes a string as argument and determines if the string has more vowels than consonants. Test the method by asking the user to enter a string. Hint: Write your recursive method to first count vowels and consonants.Given an input string, complete a helper method that extracts the vowels and returns the string of the vowels in the input string recursively. All strings are lowercase. Do not use any loops or regular expressions. Test case 1: extractVowel("i love you 3000") "ioeou" Test case 2: extractVowel("aiueo") "aiueo" Given methods: public static String extractVowel (String str) { return extractVowelHelper (str, 0, ""); } 1 2 3 4 private static boolean isVowel (char c){ return c == 'a' || c == 'e' || c == 'i' || c == '0' || == 'u'; } 5. 6. 7.Using Java: Write a recursive method called 'vowels', that returns the number of vowels in a string
- Exercise-3: Write a recursive and iterative methods to convert a decimal number to its binary equivalent string. The iterative algorithm (in pseudo-code) for converting a decimal integer into a binary integer as follows: 1. If the integer is 0 or 1, its binary equivalent is 0 or 1. 2. If the integer is greater than or equal to 2 do the following: 3. Divide the integer by 2. 4. Separate the result into a quotient and remainder. 5. Divide the quotient again and repeat the process until the quotient is zero. 6. Write down all remainders in reverse order as a string. 7. This string is the binary equivalent of the given integer. // Recursive decimal to binary method public static String dec2binRecursive(int n) { if (n<2) return n+ " ". else return dec2binRecursive(n/2) + n%2; } a) Write the Complete program for above Recursive decimal to binary method Algorit b) Iterative decimal to binary methodWrite a recursive method that displaysa string reversely on the console using the following header: public static void reverseDisplay(String value) For example, reverseDisplay("abcd") displays dcba. Write a test programthat prompts the user to enter a string and displays its reversal.Write a recursive method that returns a string of all positive, prime numbers less than or equal to a given value n. Use this header: String primeList (int n) For example, primeList (10) returns "7532" because the range 10 down to 0 includes the prime numbers 7, 5, 3, 2. Here are a few more examples. Returned Input n Notes String Any value less than 2 the returned string is empty 2 "2" "32" 7. "7532" 10 "7532" returned string has values 13, 11, 7, 5, 3, 2 15 "13117532" Note: A prime number is a whole number greater than 1, and it is divisible only by itself or the number 1. For example, 2, 3, 5, 7, 11, 13, 17, etc are all prime numbers. Here is a method that checks if a given number is prime: boolean isPrime(int n) { /method returns true if n is prime, otherdse it returns false if(n<2) return false; for (Int 1- 2; i < n; i++) //condition could also be icMath.sqrt(n) if(n %i -- 0) return false; return true;
- java: Run length coding is a method to represent a string in a more compact manner. Each character that occurs more than 2 times in a row is represented by the character and a number following it. Two examples are: "abba" → "abba""abcccbbbba" → "abc3b4a"Write a function that calculates how many characters the encoded string is shorter than the original.Write a recursive method that will reverse the order of the characters in agiven string and return the result as a new string. For example, if "book" isthe argument, the result would be "koob".Help me please: A palindrome is a string that reads the same both forward and backward. For example, the string madam is a palindrome. Write a program that uses a recursive function to check whether a string is a palindrome. Prompt the user for a string. If the string is a palindrome output a message in the following format: madam is a palindrome else Hello is not a palindrome Your program must contain a value-returning recursive function that returns true if the string is a palindrome and false otherwise. Do not use any global variables; use the appropriate parameters.