Write an expression to detect that the first character of userlnput matches firstLetter. 1 import java.util.Scanner; 2 3 public class CharMatching { public static void main (String [] args) { Scanner scnr = new Scanner(System.in); String userInput; char firstLetter; 4 5 7 8 = scnr.nextLine(); scnr.nextline().charAt(0); 9. userInput firstLetter 10 11 if (/* Your solution goes here */) { System.out.println("Found match: } else { System.out.println("No match: } 12 13 + firstLetter); 14 15 + firstLetter); %3D 16 17 18

Write an expression to detect that the first character of userlnput matches firstLetter. 1 import java.util.Scanner; 2 3 public class CharMatching { public static void main (String [] args) { Scanner scnr = new Scanner(System.in); String userInput; char firstLetter; 4 5 7 8 = scnr.nextLine(); scnr.nextline().charAt(0); 9. userInput firstLetter 10 11 if (/* Your solution goes here */) { System.out.println("Found match: } else { System.out.println("No match: } 12 13 + firstLetter); 14 15 + firstLetter); %3D 16 17 18

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

See similar textbooks

Similar questions

Write a client program that loops around getting two fractions from the user,output their sum, and state whether or not they are equal. Keep looping until the first fraction entered is a zero fraction. import java.util.ArrayList;import java.util.Scanner; //Define the class Fractionclass Fraction{private int n, d;public Fraction(){//Initialize the valuesthis.n = this.d = 0;}public Fraction(int n, int d){//Initialize the variablesthis.n = n;this.d = d;}//Define the getter function getNum() that returns the numeratorpublic int getNum(){//Returns numeratorreturn n;}//Define the getter function getDen() that returns the denominatorpublic int getDen(){//Returns denominatorreturn d;}//Define the boolean function isZero() that returns 0 if numerator is 0 and denominator is not equals to zeropublic boolean isZero(){return(getNum() == 0 && getDen() != 0);}public boolean isequals(Object c){Fraction f = (Fraction) c;return(Integer.compare(n,f.n))==0 &&…
Write a program that prints all digits of any integer in reverse order. import java.util.Scanner;public class ReverseDigits{ public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); // TODO: Print the digits of n in reverse /* Your code goes here */ System.out.print(""); if (n < 0) { /* Your code goes here */ n = n*-1; //Convert number to a positive value System.out.print(" -"); //Print negative } else if (n == 0) { /* Your code goes here */ System.out.println("0"); return; } int reverseNumber = 0; while (n != 0) { int digit = n % 10; //extracting the last digit from n reverseNumber = reverseNumber*10 + digit; // printing the digit n = n / 10; //updating n by removing the last digit }…
Write a program that prints all digits of a positive integer in reverse order. import java.util.Scanner;public class ReverseDigits{ public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); // TODO: Print the digits of n in reverse while (/* Your code goes here */) { /* Your code goes here */ System.out.print(digit); /* Your code goes here */ } System.out.println(); }}
import java.util.Random; class Main { public static void main(String[] args) { Random rand = new Random(); int a = new int[100]; for (int i = 0; i < 100; i++) { a[i] = rand.nextInt(100); } print(a); System.out.println("---"); quicksort(a, 0, a.length - 1); print(a); } public static void print(int[] a) { for (int x : a) { System.out.println(x); } } public static void swap(int[] a, int p1, int p2) { int temp = a[p1]; a[p1] = a[p2]; a[p2] = temp; } public static int partition(int[] a, int left, int right) { int pivot = right; int p1 = left; int p2 = pivot - 1; while (p2 >= p1) { if (a[p1] > a[pivot]) { swap(a, p1, p2); swap(a, p2, pivot); p2 = pivot - 1; } else { p1++; } } return pivot; } public static void quicksort(int[] a, int left, int right) { if (left < right) { int p = partition(a, left, right); quicksort(a, left, p - 1);…
Java Program Fix this Rock, Paper and scissor program so I can upload it to Hypergrade and it can pass all the test cases. Here is the program: import java.util.Random;import java.util.Scanner;public class RockPaperScissors { public static void main(String[] args) { if (args.length != 1) { System.out.println("Please provide a seed as a command line argument."); return; } long seed = Long.parseLong(args[0]); Random random = new Random(seed); Scanner scanner = new Scanner(System.in); System.out.println("Enter 1 for rock, 2 for paper, and 3 for scissors."); do { int computerChoice = random.nextInt(3); int userChoice = getUserChoice(scanner); if (userChoice == -1) { continue; } System.out.println("Your choice: " + choiceToString(userChoice) + ". Computer choice: " + choiceToString(computerChoice) + "."); int result =…
Write a client program that allows the user to add up any number of non-zero fractions. The program should display the running total as an exact fraction (in simplified form as numerator / denominator), and as an approximate double value. The user can finish by entering a fraction that represents a zero fraction import java.util.ArrayList;import java.util.Scanner; //Define the class Fractionclass Fraction{private int n, d;public Fraction(){//Initialize the valuesthis.n = this.d = 0;}public Fraction(int n, int d){//Initialize the variablesthis.n = n;this.d = d;}//Define the getter function getNum() that returns the numeratorpublic int getNum(){//Returns numeratorreturn n;}//Define the getter function getDen() that returns the denominatorpublic int getDen(){//Returns denominatorreturn d;}//Define the boolean function isZero() that returns 0 if numerator is 0 and denominator is not equals to zeropublic boolean isZero(){return(getNum() == 0 && getDen() != 0);}public boolean…
Write a method swapArrayEnds() that swaps the first and last elements of its array parameter. Ex: sortArray = {10, 20, 30, 40} becomes {40, 20, 30, 10}. import java.util.Scanner; public class ModifyArray { /* Your solution goes here */ public static void main (String [] args) { Scanner scnr = new Scanner(System.in); int numElem = 4; int[] sortArray = new int[numElem]; int i; int userNum; for (i = 0; i < sortArray.length; ++i) { sortArray[i] = scnr.nextInt();} swapArrayEnds(sortArray); for (i = 0; i < sortArray.length; ++i) { System.out.print(sortArray[i]); System.out.print(" ");} System.out.println("");}}
import java.util.Scanner; public class LabProgram { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); int n = scnr.nextInt(); int[] arr = new int[n]; for (int i = 0; i < n; i++) { arr[i] = scnr.nextInt(); } for (int i = n - 1; i >= 0; i--) { System.out.print(arr[i]); if (i > 0) { System.out.print(","); } } }}
Please help debug this: Debugging Exercise 4-3, Farrell, Joyce, Java Programming, 9th edition, Cengage Learning public class DebugBox { private int width; private int length; private int height; private FixDebugBox() { length = 1; width = 1; height = 1; } public DebugBox(int width, int length, int height) { width = width; length = length; height = height; } public void showData() { System.out.println("Width: " + width + " Length: " + length + " Height: " + height); } public double getVolume() { double vol = length - width - height; return vol; } }
Fix the Java code below, make sure it can make the same outputs as the sample: import java.util.ArrayList;import java.util.Scanner; class Main{ //Returns index of name if found otherwise -1 public static int findName(ArrayList<String> arr, String name) { for(int i = 0; i < arr.size(); i++) if(arr.get(i).equals(name)) return i; return -1;//Name not found } //Deletes a name from ArrayList public static void deleteName(ArrayList<String> arr, String name) { int index = findName(arr, name);//Get index of name to be deleted for(int i = index; i < arr.size() - 1; i++){ arr.set(i, arr.get(i + 1)); } arr.remove(arr.size() - 1);//Remove last element } public static void main(String[] args) { Scanner scan = new Scanner(System.in); System.out.print("Enter number of students(upto 10): "); int n = scan.nextInt(); ArrayList<String> arr = new…
Please sort out the following JAVA code....line by line. Run the code in Netbeans and provide screenshots to verify that it runs successfully. CODE: import java.io.*; import java.util.*; public class experiment { public static void main(String args[]) { Scanner in=new Scanner(System.in); int time[]=new int[10]; float weight[]=new float[10]; String get; char ch; int i=0; do{ try { System.out.print("\nEnter the time in seconds:"); time[i]=in.nextInt(); System.out.print("\nEnter the weight in kilograms:"); weight[i]=in.nextFloat(); i++; } catch(Exception e) { System.out.print("\nInvalid type"); } System.out.print("\n-----------------"); System.out.print("\n|Time\t|Weight\t|"); System.out.print("\n-----------------"); for(int x=0;x<i;x++) { System.out.print("\n|"+time[x]+"\t|"+weight[x]+"\t|"); System.out.print("\n-----------------"); } if(i==10) { for(int x=0;x<9;x++) { time[x]=time[x+1]; weight[x]=weight[x+1]; } i--; } System.out.print("\nDo you want to continue?(y/n) ");…
Continuing from the example, modify the program so that it outputs the average grade in each course, and also shows which course has the highest average grade. import java.util.Scanner; public class Main { publicstaticvoid main(String[] args) { Scanner s = new Scanner(System.in); int numCourses, numTests; double[][] testScores; System.out.print("How many courses are you taking? "); numCourses = s.nextInt(); testScores = new double[numCourses][]; // allocate an array of references to 1-D arrays (rows) for(int i = 0; i < numCourses; i++) { System.out.print("How many tests are in course number " + (i+1) + "? "); numTests = s.nextInt(); // allocate this row: a 1-D array of doubles: testScores[i] = new double[numTests]; } for(int courseId=0; courseId < testScores.length; courseId++) { for(int testId=0; testId < testScores[courseId].length; testId++) { System.out.print("What was your grade on test " + (testId+1) + " for course " + (courseId+1) + "? ");…