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Write a Java program that will 1. Ask the user to type in a sentence, using a JOptionPane.showInputDialog(). 2. The program will

Paraphin [41]

Answer:

Here is the JAVA program :

import javax.swing.JOptionPane; //to use JOptionPane

public class Main { //class name

public static void main(String[] args) { //start of main method

int ECount= 0; //counts number of upper case E

int eCount= 0; //counts number of lower case e

String sentence; //stores input sentence string

sentence = JOptionPane.showInputDialog(null, "Type a sentence (type stop to exit)"); //uses showInputDialog method to display a dialog box which prompts user to enter a sentence

int length = sentence.length(); //stores the length of the sentence

while (!sentence.equalsIgnoreCase("stop")) //the loop continues to execute until the user types stop

{ for (int i = 0; i < length; i++) { //loops through the sentence

if (sentence.charAt(i) == 'E') //if the character is an uppercase E

ECount += 1; //adds 1 to the count of Ecount

if (sentence.charAt(i) == 'e') //if the character in a sentence is lowercase e

eCount += 1;} //adds 1 to the count of lower case e

JOptionPane.showMessageDialog(null, "There are " + ECount + " number of E's and " + eCount + " number of e's in " +sentence); //displays the number of times uppercase and lowercase (E and e) occur in sentence

sentence = JOptionPane.showInputDialog(null, "Type a sentence (type stop to exit"); //prompts user to enter the next sentence

length = sentence.length(); //stores the length of sentence at each iteration of while loop until user enters stop

eCount=0; //resets the counter of lowercase e

ECount=0; } } } //resets the counter of uppercase e

Explanation:

The program uses showInputDialog() method that displays a dialog box on output screen. This dialog box prompts the user to enter a string (sentence) Suppose user enters "Evergreen" as input sentence so

sentence = "Evergreen"

Next the length of this string is computed using length() method and stored in length variable. So

length = sentence.length();

length = 9

The for loop iterates through this input sentence until the variable i is less than length i.e. 9

At first iteration

if (sentence.charAt(i) == 'E') becomes

if (sentence.charAt(0) == 'E')

Here charAt() method is used which returns the character at the specified index i. This if condition is true because the character at 0-th index (first character) of the sentence Evergreen is E. So ECount += 1; statement adds 1 to the count of upper case E so

ECount = 1

At second iteration:

if (sentence.charAt(1) == 'E')

this condition is false because the character at 1st index of sentence is 'v' which not an upper case E so the program moves to next if condition if (sentence.charAt(i) == 'e') which is also false because the character is not a lower case e either.

At third iteration:

if (sentence.charAt(2) == 'E')

this condition is false because the character at 2nd index of sentence is 'e' which not an upper case E so the program moves to next if condition if (sentence.charAt(i) == 'e') which is true because the character is a lower case e. So the statement eCount += 1; executes which adds 1 to the count of e.

eCount = 1

So at each iteration the sentence is checked for an upper case E and lower case e. After the loop breaks, the program moves to the statement:

JOptionPane.showMessageDialog(null, "There are " + ECount + " number of E's and " + eCount + " number of e's in " +sentence);

which displays the number of uppercase E and lower case e in a message dialog box. So the output is:

There are 1 number of E's and 3 number of e's in Evergreen.

Then because of while loop user is prompted again to enter a sentence until the user enters "stop". Now the user can enter Stop, StOp, STOp etc. So equalsIgnoreCase method is used to cover all upper/lower case possibilities of the word "stop".

The screenshot of the program and its output is attached.

6 0

4 years ago

What can you learn at Udemy.com?

PtichkaEL [24]

You can learn all sorts of Programming tutorial and other stuff from udemy.com.
Thank you.

5 0

3 years ago

Carlos owns a hardware store. He currently is not using any software to track what he has in the store. In 1–2 sentences, descri

Tresset [83]

Carlos Should use a Security Camera to keep track of his physical hardware. Carlos can then use a computer to monitor the security cameras.

7 0

3 years ago

Read 2 more answers

Use BlueJ to write a program that reads a sequence of data for several car objects from an input file. It stores the data in an

vaieri [72.5K]

Answer:

Java code is explained below

Explanation:

// Car.java

import java.util.Calendar;

public class Car {

private String vin;

private String make;

private String model;

private double cost;

private int year;

public Car(String vin, String make, String model, double cost, int year) {

this.vin = vin;

this.make = make;

this.model = model;

this.cost = cost;

this.year = year;

}

public String getModel() {

return model;

}

public double getCost() // returns car’s cost

{

return cost;

}

public String getMake() // returns car’s make

{

return make;

}

public boolean isExpensive() // returns true if car has cost above 30000 and

// false

// otherwise

{

if (cost > 30000)

return true;

else

return false;

}

public boolean isAntique() // returns true if car’s has above 50 years, and

// false

// otherwise

{

int cyear = Calendar.getInstance().get(Calendar.YEAR);

if ((cyear-year) > 50)

return true;

else

return false;

}

public String toString() // returns string with all car’s data in one line

// separated by tabs.

{

return vin + "\t" + make + "\t" + model + " " + cost + "\t" + year;

}

___________________________

// CarList.java

import java.io.File;

import java.io.FileNotFoundException;

import java.util.ArrayList;

import java.util.Scanner;

public class CarList {

private ArrayList<Car> type;

public CarList() throws FileNotFoundException {

this.type = new ArrayList<Car>();

Scanner sc1 = new Scanner(new File("inData.txt"));

while (sc1.hasNextLine()) {

String str = sc1.nextLine();

String arr[] = str.split(" ");

type.add(new Car(arr[0], arr[1], arr[2], Integer.parseInt(arr[3]),

Integer.parseInt(arr[4])));

}

sc1.close();

}

public void printList()

{

System.out.println("Displaying cars:");

for(int i=0;i<type.size();i++)

{

System.out.println(type.get(i));

}

public void printExpensiveCars()

{

System.out.println("List of expensive cars:");

for(int i=0;i<type.size();i++)

{

if(type.get(i).isExpensive())

{

System.out.println(type.get(i));

}

public Car cheapestCar()

{

int cheapIndx=0;

double min=type.get(0).getCost();

for(int i=0;i<type.size();i++)

{

if(min>type.get(i).getCost())

{

min=type.get(i).getCost();

cheapIndx=i;

}

return type.get(cheapIndx);

}

public int countCarsWithModel(String model)

{

int cnt=0;

for(int i=0;i<type.size();i++)

{

if(type.get(i).getModel().equals(model))

{

cnt++;

}

return cnt;

}

public ArrayList<Car> antiqueCarList ()

{

ArrayList<Car> arl=new ArrayList<Car>();

for(int i=0;i<type.size();i++)

{

if(type.get(i).isAntique())

arl.add(type.get(i));

}

return arl;

}

_________________________________

// TestCarList.java

import java.io.File;

import java.io.FileNotFoundException;

import java.util.ArrayList;

import java.util.Scanner;

public class TestCarList {

public static void main(String[] args) throws FileNotFoundException {

CarList cl = new CarList();

cl.printList();

cl.printExpensiveCars();

ArrayList arl = cl.antiqueCarList();

System.out.println("Displaying the AntiqueCar list:");

for (int i = 0; i < arl.size(); i++) {

System.out.println(arl.get(i));

}

System.out.println("Displaying the cheapest car :");

System.out.println(cl.cheapestCar());

System.out.println("No of Royal model Cars :"+ cl.countCarsWithModel("Royal"));

}

____________________________

Output:

Displaying cars:

1234567CS2 Subaru Impreza 27000.0 2017

1233219CS2 Toyota Camry 31000.0 2010

9876543CS2 Ford Mustang 51000.0 1968

3456789CS2 Toyota Tercel 20000.0 2004

4567890CS2 Crysler Royal 11000.0 1951

List of expensive cars:

1233219CS2 Toyota Camry 31000.0 2010

9876543CS2 Ford Mustang 51000.0 1968

Displaying the AntiqueCar list:

9876543CS2 Ford Mustang 51000.0 1968

4567890CS2 Crysler Royal 11000.0 1951

Displaying the cheapest car :

4567890CS2 Crysler Royal 11000.0 1951

No of Royal model Cars :1

3 0

3 years ago

Help please!, explain what is missing and what needs to be changed if anything.

german

Using the computer language in JAVA to write a function code that output numbers in reverse

<h3>Writting the code in JAVA:</h3>

import java.util.Scanner;

public class LabProgram {

public static void main(String[] args) {

Scanner scnr = new Scanner(System.in);

int[] userList = new int[20];

int numElements;

numElements = scnr.nextInt();

for (int i = 0; i < numElements; ++i) {

userList[i] = scnr.nextInt();

}

for (int i = numElements - 1; i >= 0; --i) {

System.out.print(userList[i] + " ");

}

System.out.println();

}

}

See more about JAVA at brainly.com/question/12975450

#SPJ1

8 0

2 years ago