*6.23 (Occurrences of a specified character) Write a method that finds the number ofoccurrences of a specified character in a string using the following header:public static int count (String str, char a)For example, count ("Welcome", 'e') returns 2. Write a test program thatprompts the user to enter a string followed by a character then displays thenumber of occurrences of the character in the string.Expected Output:Run1:Enter a string: TestingEnter a character: TThe number of occurrences of T in Testing is 1Run2:Enter a string: hello worldEnter a character: oThe number of occurrences of o in hello world is 2

Answered: (Occurrences of a specified character)…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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5.27 LAB: Fun with characters (EO) Write a method checkCharacter() which has 2 parameters: A String, and a specified index (an int). Method checkCharacter() checks the character at the specified index of the String parameter, and returns a String based on the type of character at that location indicating if the character is a letter, digit, whitespace, or unknown character. Ex: The method calls below with the given arguments will return the following Strings: checkCharacter("happy birthday", 2) returns "Character 'p' is a letter"checkCharacter("happy birthday", 5) returns "Character ' ' is a white space"checkCharacter("happy birthday 2 you", 15) returns "Character '2' is a digit"checkCharacter("happy birthday!", 14) returns "Character '!' is unknown" Your program must define the method:public String checkCharacter(String word, int index) code: import java.util.Scanner; public class FunWithCharacters { /* Type your code here */ public static void main(String[] args) {…
6.28 LAB: Check if array is sorted Use java Programming Write the inOrder() method, which has an array of integers as a parameter, and returns true if the numbers are sorted (in order from low to high) or false otherwise. The program outputs "In order" if the array is sorted, or "Not in order" if the array is not sorted. Ex: If the array passed to the inOrder() method is [5, 6, 7, 8, 3], then the method returns false and the program outputs: Not in order Ex: If the array passed to the inOrder() method is [5, 6, 7, 8 , 10], then the method returns true and the program outputs: In order public class LabProgram {public static boolean inOrder(int [] nums) {/* Type your code here. */ }public static void main(String[] args) {// Test out-of-order example.int [] nums1 = {5, 6, 7, 8, 3};if(inOrder(nums1)){System.out.println("In order");}else{System.out.println("Not in order");}// Test in-order example.int [] nums2 = {5, 6, 7, 8, 10};if(inOrder(nums2)){System.out.println("In…
5.25 LAB: Longest string (EO) Write a method, findLongest(), that takes two strings as parameters and returns the longest string. If the strings are the same length then return the second string. Ex. If the input is: almond pistachio the method findLongest() returns and then the program outputs: pistachio Your program must define the following method:public String findLongest(String str1, String str2) import java.util.Scanner; public class LongestString {public String findLongest(String str1, String str2) {/* Type your code here. */} public static void main(String[] args) {LongestString mainObject = new LongestString();Scanner scnr = new Scanner(System.in);String str1;String str2;String longest;str1 = scnr.next();str2 = scnr.next();longest = mainObject.findLongest(str1, str2);System.out.println(longest);}}
5.28 LAB: Toll calculation (EO) Toll roads have different fees based on the time of day and on weekends. Write a method calcToll() that has three parameters: the current hour of time (int), whether the time is morning (boolean), and whether the day is a weekend (boolean). The method returns the correct toll fee (double), based on the chart below. Weekday Tolls Before 7:00 am ($1.15) 7:00 am to 9:59 am ($2.95) 10:00 am to 2:59 pm ($1.90) 3:00 pm to 7:59 pm ($3.95) Starting 8:00 pm ($1.40) Weekend Tolls Before 7:00 am ($1.05) 7:00 am to 7:59 pm ($2.15) Starting 8:00 pm ($1.10) Ex: The method calls below, with the given arguments, will return the following toll fees: calcToll(7, true, false) returns 2.95calcToll(1, false, false) returns 1.90calcToll(3, false, true) returns 2.15calcToll(5, true, true) returns 1.05 code: public class TollCalculation { public double calcToll(int hour, boolean isMorning, boolean isWeekend) { /* Type your code here. */ } public…
6.27 LAB: Toll calculation Use Java programming. Toll roads have different fees based on the time of day and on weekends. Write a method calcToll() that has three parameters: the current hour of time (int), whether the time is morning (boolean), and whether the day is a weekend (boolean). The method returns the correct toll fee (double), based on the chart below. Weekday Tolls Before 7:00 am ($1.15) 7:00 am to 9:59 am ($2.95) 10:00 am to 2:59 pm ($1.90) 3:00 pm to 7:59 pm ($3.95) Starting 8:00 pm ($1.40) Weekend Tolls Before 7:00 am ($1.05) 7:00 am to 7:59 pm ($2.15) Starting 8:00 pm ($1.10) Ex: The method calls below, with the given arguments, will return the following toll fees: calcToll(8, true, false) returns 2.95calcToll(1, false, false) returns 1.90calcToll(3, false, true) returns 2.15calcToll(5, true, true) returns 1.05 public class LabProgram {public static double calcToll(int hour, boolean isMorning, boolean isWeekend) {/* Type your code here. */ } public static void…
6.25 LAB: Step counter IN JAVA ** A pedometer treats walking 1 step as walking 2.5 feet. Define a method named feetToSteps that takes a double as a parameter, representing the number of feet walked, and returns an integer that represents the number of steps walked. Then, write a main program that reads the number of feet walked as an input, calls method feetToSteps() with the input as an argument, and outputs the number of steps. Use floating-point arithmetic to perform the conversion. Ex: If the input is: 150.5 the output is: 60 The program must define and call a method:public static int feetToSteps(double userFeet) import java.util.Scanner; public class LabProgram { /* Define your method here */ public static void main(String[] args) { /* Type your code here. */ }}
4.32 LAB: Matching strings (JAVA) Write a program in java that compares two strings given as input. Output the number of characters that match in each string position. The output should use the correct verb (match vs matches) according to the character count. Ex: If the input is: crash crush the output is: 4 characters match Ex: If the input is: cat catnip the output is: 3 characters match Ex: If the input is: mall saw the output is: 1 character matches Code starts here: import java.util.Scanner; public class LabProgram { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); /* Type your code here. */ }}
6.46 LAB: Subtracting list elements from max - methods (JAVA) When analyzing data sets, such as data for human heights or for human weights, a common step is to adjust the data. This can be done by normalizing to values between 0 and 1, or throwing away outliers. For this java program, adjust the values by subtracting each value from the maximum. The input begins with an integer indicating the number of integers that follow. Assume that the list will always contain between 1 and 20 integers. Ex: If the input is: 5 30 50 10 70 65 the output is: 40 20 60 0 5 For coding simplicity, follow every output value by a space, even the last one. Your program must define and call a method:public static int getMaxInt(int[] listInts, int listSize) Code starts here: import java.util.Scanner; public class LabProgram { /* Define your method here */ public static void main(String[] args) { /* Type your code here. */ }}
5.24 LAB: Count evens (EO) Kindly perform acion on the given code below and show output: Write a method, countEvens(), that has four integer parameters, and returns the count of parameters where the value is an even number (i.e. evenly divisible by 2). Ex: If the four parameters are: 1 22 11 40 the method countEvens() returns: 2 Hint: Use the modulo operator % to determine if each number is even or odd. Your program must define the method:public int countEvens(int num1, int num2, int num3, int num4) code: import java.util.Scanner; public class CountEvens { /* Type your code here */ public static void main(String[] args) { Scanner scnr = new Scanner(System.in); CountEvens labObject = new CountEvens(); int num1; int num2; int num3; int num4; num1 = scnr.nextInt(); num2 = scnr.nextInt(); num3 = scnr.nextInt(); num4 = scnr.nextInt(); int result = labObject.countEvens(num1, num2, num3, num4);…
3.27 LAB: Login name Write a program that creates a login name for a user, given the user's first name, last name, and a four-digit integer as input. Output the login name, which is made up of the first five letters of the last name, followed by the first letter of the first name, and then the last two digits of the number (use the % operator). If the last name has less than five letters, then use all letters of the last name. Hint: Use the to_string() function to convert numerical data to a string. Ex: If the input is: Michael Jordan 1991 the output is: Your login name: JordaM91 Ex: If the input is: Kanye West 2024 the output is: Your login name: WestK24 38°F Clea VDICE
5.22 LAB: Password modifier Many user-created passwords are simple and easy to guess. Write a program that takes a simple password and makes it stronger by replacing characters using the key below, and by appending "!" to the end of the input string. I need to figure out how to do this code using java. Thanks, Sarah Thomas
6.38 LAB: Convert to binary - methods (JAVA) Write a program in java that takes in a positive integer as input, and outputs a string of 1's and 0's representing the integer in binary. For an integer x, the algorithm is: As long as x is greater than 0 Output x % 2 (remainder is either 0 or 1) x = x / 2 Note: The above algorithm outputs the 0's and 1's in reverse order. You will need to write a second function to reverse the string. Ex: If the input is: 6 the output is: 110 The program must define and call the following two methods. Define a method named intToReverseBinary() that takes an int as a parameter and returns a string of 1's and 0's representing the integer in binary (in reverse). Define a method named stringReverse() that takes a string as a parameter and returns a string representing the input string in reverse. public static String intToReverseBinary(int integerValue)public static String stringReverse(String inputString) Code starts here: import java.util.Scanner; public…

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