Java | JSP | JSF Answers

Write a program to compute the roots (x1, x2) of a quadratic equation.
X=( -b ± √b²-4ac)/2a

Write a menu driven program using SWITCHES that provides 3 options.
• The first option allows the user enter a temperature in Celsius and displays the corresponding Fahrenheit (F) temperature.
• The second option allows the user enter a temperature in Fahrenheit and displays the corresponding Celsius (C) temperature.
• The third option allows the user to quit. (Hint: F=(9C/5)+ 32)

Q1) What are the keywords that java supports? Describe the data types available in java programming language.

Q2) Describe StringBuffer class in java. List all the functions relevant to it and explain any five of them.



Please send me the answer of these 2 question in 400 word. Please

How to initialise elements in an arrayList in a for loop? For example, I have an arrayList called checkingAccount. I want to make the checkingAccount elements to be set from 100 to 109 and make them assigned to a different class. I made it working on the array, but when I converted it to arrayList, it does not work anymore! :(

How do I write a program that prompts the user to enter the number of players and each player’s name and number of points scored, then display the name of the player with the highest score and the high score?

Give an example of a program fragment in which the same name is used to describe two different variables.

How different between LinkedList and ArrayList ? In which case we use each of them LinkedList or ArrayList?

i am writing a program for cryptography(RSA encryption),,i don't want to use encryption builtin functions of java......i want to make them own...so i want to know...which is the biggest data type for saving very very long integers....

Part I (Chapter 4 & 5): Guess a number from 1 to 100
Example of Run-time Output Console
Welcome to the Guess the Number Game
++++++++++++++++++++++++++++++++++++

I'm thinking of a number from 1 to 100.
Try to guess it.

Enter number: 50
You got it in 1 tries.
Great work! You are a mathematical wizard.

Try again? (y/n): y

I'm thinking of a number from 1 to 100.
Try to guess it.

Enter number: 50
Way too high! Guess again.

Enter number: 30
Too high! Guess again.

Enter number: 15
Too low! Guess again.

Enter number: 23
Too high! Guess again.

Enter number: 19
Too low! Guess again.

Enter number: 21
Too high! Guess again.

Enter number: 20
You got it in 7 tries.
Not too bad! You've got some potential.

Try again? (y/n):
Error! This entry is required. Try again.
Try again? (y/n): x
Error! Entry must be 'y' or 'n'. Try again.
Try again? (y/n): n

Bye - Come back soon!

Press any key to continue . . .
Operation
• Write a class called GuessGame with all business logics for guess game, Use the Validator class in

Part I (Chapter 4 & 5): Guess a number from 1 to 100
Example of Run-time Output Console
Welcome to the Guess the Number Game
++++++++++++++++++++++++++++++++++++

I'm thinking of a number from 1 to 100.
Try to guess it.

Enter number: 50
You got it in 1 tries.
Great work! You are a mathematical wizard.

Try again? (y/n): y

I'm thinking of a number from 1 to 100.
Try to guess it.

Enter number: 50
Way too high! Guess again.

Enter number: 30
Too high! Guess again.

Enter number: 15
Too low! Guess again.

Enter number: 23
Too high! Guess again.

Enter number: 19
Too low! Guess again.

Enter number: 21
Too high! Guess again.

Enter number: 20
You got it in 7 tries.
Not too bad! You've got some potential.

Try again? (y/n):
Error! This entry is required. Try again.
Try again? (y/n): x
Error! Entry must be 'y' or 'n'. Try again.
Try again? (y/n): n

Bye - Come back soon!

Press any key to continue . . .
Operation
• Write a class called GuessGame with all business logics for guess game, Use the Validator class in