Question 1: --

Write a Java application that prompts a user to input a word and output the word to the screen the word in alternating lowercase and uppercase letters printing all characters in a single line. Note that the first character is in lowercase. For example, if the input is

florida

the output should be

fLoRiDa

Question 2: --

Provide a GUI for problem 1. Modify the Java program from problem 1 so that the input is entered using a GUI window like JOptionPane and the output is displayed in a JOptionPane message dialog window.

Question 3: --

Write a program that asks the user for the first name of type string, the last name of type string and the age of type integer. Then it outputs this data to the text file test.txt, that is, it outputs the first name, the last name, and the age.

Question 4: --

Review the provided classes prob4.java, CelsiusThread.java, and FarenheitThread.java. In these programs, the user is prompted to enter a temperature. Then, in one thread the temperature is converted to Celsius and printed, and in the other thread the temperature is converted to Fahrenheit and printed. See the sample output below: --

Enter the temperature (Fahrenheit or Celsius):

32

Starting Executor

32.00 Degrees Fahrenheit = 0.00 degrees Celsius

32.00 Degrees Celsius = 89.60 degrees Fahrenheit

These codes have errors which do not allow them to run using the two threads. For instance, the threads are not properly configured, and there are problems with the input data and objects specifications. Review and fix these errors.

File prob4.java

import java.util.concurrent.Executors;

import java.util.concurrent.ExecutorService;

import java.util.Scanner;

public class prob4

{

@SuppressWarnings("resource")

public static void main(String[] args)

{

double T;

scanner = new Scanner(System.in);

// Enter the temperature

System.out.println(" Enter the temperature (Farenheit or Celsis):");

T = scanner.nextDouble();

// create and name each runnable

addMT = new CelsiusThread(T);

subtractMT = new FarenheitThread(T);

System.out.println("Starting Executor");

// create ExecutorService to manage threads

ExecutorService executorService = Executors.newCachedThreadPool();

// start the two threads

executorService.execute(addMT);

executorService.execute(subtractMT);

// shut down ExecutorService--it decides when to shut down threads

// System.out.printf("Tasks started, main ends.%n%n");

} // end main

File CelsiusThread.java

/*

* Calculate the temperature in degrees Celsius, assuming that the input temperature

* is in degrees Fahrenheit

*/

public class CelsiusThread {

double T, TC;

public CelsiusThread(double Tinput)

{

// Store variables

T=Tinput;

}

// Calculate temperature in degrees Celsius

public void calculateCelsius()

{

// System.out.printf("%n Starts Celsius thread ... %n ");

TC=(T-32.0)*5.0/9.0;

System.out.printf("%n %.2f %s %.2f %s", T,"Degrees Farenheit = ",TC," degrees Celsius");

}

}

File FarenheitThread.java

/*

* Calculate the temperature in degrees Farenheit, assuming that the input temperature

* is in degrees Celsius

*/

public class FarenheitThread {

double T, TF;

public FarenheitThread(double Tinput)

{

// Store variables

T=Tinput;

}

// Subtract the numbers

public void calculateFarenheit()

{

// System.out.printf("%n Starts the Farenheit thread ... %n ");

TF=T*9.0/5.0+32.0;

System.out.printf("%n %.2f %s %.2f %s", T,"Degrees Celsius = ",TF," degrees Farenheit");

}

}

NOTE: -- Kindly give solutions in step by step manner and provide screenshots of outputs. [Programming Language: -- JAVA]