(Occurrences of a specified character in a string) Write a recursive method that finds the number of occurrences of a specified letter in a string using the follow- ing method header: public static int count(String str, char a) For example, count("Welcome", 'e') returns 2.
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- T/F 6. Consider the following recursive sum method:public int sum(int x){if (x == 0) return 0;else return sum(x - 1) + 1;}i. Write a recursive method named displayStars to generate a pattern of stars with numbers such as the following: 1* 2*2* 3*3*3* 4*4*4*4* 4*4*4*4* 3*3*3* 2*2* 1* (ii). Also, write a program that prompts the user to enter the number of lines in the pattern and uses the recursive method displayStars to generate the pattern. For example, specifying the number of lines to be 4 generates the above pattern.Do not use static variables to implement recursive methods. USING JAVA: // P6 public static int countSubstrings(String s1, String s2) { } Write a recursive method countSubstrings that counts the number of non-overlapping occurrences of a string s2 in a string s1. Use the method indexOf() from String class. As an example, with s1=”abab” and s2=”ab”, countSubstrings returns 2. With s1=”aaabbaa” and s2=”aa”, countSubstrings returns 2. With s1=”aabbaa” and s2=”AA”, countSubStrings returns 0. Show the output on the following strings: s1 = “Java is a programming language originally developed by James Gosling at Sun Microsystems and released in 1995 as a core component of Sun Microsystems Java platform. The language derives much of its syntax from C and C++ but has a simpler object model and fewer low-level facilities. Java applications are typically compiled to bytecode (class file) that can run on any Java Virtual Machine (JVM) regardless of computer architecture.…
- T/F 7. The recursive procedure for solving the Towers of Hanoi can only be used if the number of discs parameter is 7 or less.Make a code using Recursion The countSubstring function will take two strings as parameters and will return an integer that is the count of how many times the substring (the second parameter) appears in the first string without overlapping with itself. This method will be case insensitive. For example: countSubstring(“catwoman loves cats”, “cat”) would return 2 countSubstring(“aaa nice”, “aa”) would return 1 because “aa” only appears once without overlapping itself. public static int countSubstring(String s, String x) { if (s.length() == 0 || x.length() == 0) return 1; if (s.length() == 1 || x.length() == 1){ if (s.substring(0,1).equals(x.substring(0,1))){ s.replaceFirst((x), " "); return 1 + countSubstring(s.substring(1), x); } else { return 0 + countSubstring(s.substring(1), x); } } return countSubstring(s.substring(0,1), x) + countSubstring(s.substring(1), x); } public class Main { public static void main(String[] args) {…6) Write a recursive function to calculate the summation of numbers from 1 to n. For exampleif the user enters 5, your program would add 1+2+3+4+5 and print out the answer 15.7) Write a recursive program to calculate Fibonacci numbers. Use the definition of a Fibonaccinumber where F(n) = F(n-1) + F(n-2). use java to code
- Please help me with the below using java. Please also comment the code (explai. What each li e is doing). Please make sure both codes are completed using recursion12.10 LAB: All permutations of names- Java Write a program that lists all ways people can line up for a photo (all permutations of a list of Strings). The program will read a list of one word names (until -1), and use a recursive method to create and output all possible orderings of those names, one ordering per line. When the input is: Julia Lucas Mia -1 then the output is (must match the below ordering): Julia Lucas Mia Julia Mia Lucas Lucas Julia Mia Lucas Mia Julia Mia Julia Lucas Mia Lucas JuliaGive the sequence of values of p and q that are computed when Euclid’s algorithm is used to compute the greatest common divisor of 105 and 24. Extend the codegiven on page 4 to develop a program Euclid that takes two integers from the commandline and computes their greatest common divisor, printing out the two arguments foreach call on the recursive method. Use your program to compute the greatest commondivisor or 1111111 and 1234567.
- Do not use static variables to implement recursive methods. USING JAVA USING: // P4 public static int min(int [] a, int begin, int end) { } Implement a recursive method min that accepts an array and returns the minimum element in the array. The recursive step should divide the array into two halves and find the minimum in each half. Demonstrate the output of min on the array int [] a = { 2, 3, 5, 7, 11, 13, 17, 19, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 23, 29, 31, 37, 41, 43 }PYTHON RECURSIVE FUNCTION Write a python program that lists all ways people can line up for a photo (all permutations of a list of strings). The program will read a list of one word names, then use a recursive method to create and output all possible orderings of those names, one ordering per line. When the input is: Julia Lucas Mia then the output is (must match the below ordering): Julia Lucas Mia Julia Mia Lucas Lucas Julia Mia Lucas Mia Julia Mia Julia Lucas Mia Lucas JuliaYou are given a string of characters. Complete the below recursive method in JAVA or inPython to print the lowercase characters in a reverse manner and also print the count. Scontains the string, i is the starting index and c is the count, which are both initialized to0. [Note for Python Implementation: You are not allowed to use any built-in functionsexcept len(), print(), ord() and chr()]. def printReverse (s, i, c) : #To Do OR public void printReverse (String s, int i, int c) { // To Do } Sample Input Sample Output s = Axy3*8Gw57&Xyu1 count is 4, uwyx