Java | JSP | JSF Answers

Write a program to input 10 numbers and output the sum of the two largest values in the sequence.

Sample Output:

Enter the Numbers >> 10 2 3 4 5 6 7 9 9 10

Sum >> 20

Try Again Y/N?

Jaya Jusco (JJ) Sdn Bhd needs you to develop an application to calculate their customer JJ point’s reward. Define a class named Customer with the following variables declarations:

String CustName;

String CustAddress;

int pointRewards;

1.  Provide a default constructor and another constructor with three parameters. The constructor with parameters will assign the three values (String CustomerName, String CustomerAddress, int point). Define a public instance method named calculatePoint()to calculate the customer rewards if the point is greater than 300 points. The formula indicates that if the point is greater than 300 points, the system will add up extra 50 points.
2. Define another class named Testing to test the Customer class. Use the Scanner method to get the CustomerName, CustomerAddress and point values from the user. Declare class and create object Customer. Call the calculatePoint( ) method to display the current customer points reward.  

Create a java program which allows the user to enter two values (Using JOptionPane) to be divided. The program catches an exception if either of the entered values is not an integer.

Declare three integers—two to be input by the user and a third to hold the result after dividing the first two. The numerator and denominator variables must be assigned starting values because their values will be entered within a try block. Also declare an input String to hold the return value of the JOptionPane showInputDialog() method.int numerator = 0, denominator = 0, result; String display;

Add a try block that prompts the user for two values, converts each entered String to an integer, and divides the values, producing result(Cast the result to a double).

Add a catch block that catches an Arithmetic Exception object if division by 0 is attempted. If this block executes, display an error message, and force result to 0.

Create a class named Invoice containing fields for an item number, name, quantity, price, and total cost. Create a constructor to pass the value of the item name, quantity, and price. Also include displayLine() method that calculates the total cost for the item (As price times quantity) then displays the item number, name, quantity price, and total cost. Save the class as Invoice.java.

Place Values (JAVA)

by CodeChum Admin

Manipulating values from a series of numbers is fun, but let's try exploring the use of loops a little more.

How about printing out each digit of a number starting from its rightmost digit, going to its leftmost digit?

Instructions:

1. Input a non-zero positive integer.
2. Using while loop, print out each digit of the inputted integer in separate lines, starting from its rightmost digit until the leftmost digit of the number.
3. Tip #1: Use % 10 to get the rightmost digit. For example, if you do 412 % 10, then the result would be the rightmost digit, which is 2.
4. Tip #2: On the other hand, use / 10 to remove the rightmost digit. For example, if you do 412 / 10, then the result would be 41.
5. Tip #3: You'd have to repeat Tip #1 and Tip #2 inside the while() loop for this problem while the inputted integer is not yet 0.

Input

A line containing an integer.

214

Output

Multiple lines containing an integer.

4
1
2

Against All "Odds"

Instructions:

1. Input a positive integer. This will serve as the starting point of the loop.
2. Using a while() loop, print out all the odd numbers starting from the inputted integer, until 0. The outputted numbers must all be separated by line.
3. Also remember that since the loop goes to descending order, a decrement variable shall be created and decreased per iteration for the loop to terminate when it reaches 0.

Instructions

1. Scan an integer that will accept an integer greater than 0 and store it in a variable.
2. Using a while() loop, print out all the odd numbers starting from the inputted integer, until 0. The outputted numbers must all be separated by line, just like that of the sample output.
3. Also remember that since the loop goes to descending order, a decrement variable shall be created and decreased per iteration for the loop to terminate when it reaches 0.

Input

A line containing an integer.

10

Output

Multiple lines containing an integer.

9
7
5
3
1

Create a program using a console application name "DragonKiller". The program should ask the user to enter his/her name and surname. Create a method name RemoveSpace() to remove space between the name and the surname entered by the user. Count the number of characters within the newly created string (nameSurname). The total number of characters (Name and Surname) should be used as the size of your arrayDragon (type integer). Populate your arrayDragon with a series of odd random numbers between 10 and 50. Display all arrayDragon elements and their corresponding indexes before executing. The insertionSort method allows the user to enter a value from the arrayDragon element to search for and be removed (Killed). • Loop through the array until you find the value (Use the binarySearch to locate the value with in your array) and kill that value from the arrayDragon. By replacing the value findDragon with a Zero (0) • Print out arrayDragon with the killed element.

Write a program that declares and initializes an array of 7 integers. The program uses these static methods to perform different operations on the array:

void printArray(int[] arr) – takes the array as parameter and prints the array in horizontal order

int sumOfArray(int[] arr) – takes the array as parameter and returns the sum of the array

int getHighest(int[] arr) – takes the array as parameter and returns the highest value in the array

int resetArray(int[] arr) – takes the array as parameter and resets the value of each element to 0

Sample output:

Here’s the array: 

3 1 3 2 1 9 1

Sum: 20

Highest: 9

Here’s the array: 

0 0 0 0 0 0 0

Create a static method

public static int pow(int base, int exp)

that returns the power value of base raised to its exponent. Use this method in a program that first asks for a base value and an exponent value, calls pow() and then prints the result.

Sample output:

Enter the base: 2

Enter the exponent: 3

The power value is 8

Write a program that uses a static method called printMessage that takes a string and an integer as parameters. The string and integer parameters represent a person’s name and age. When printMessage is called with arguments “Joan” and 18, the method prints “Joan, you are 18 years old”.

Sample output:

Enter your name: Joan

Enter your age: 18

Joan, you are 18 years old