Java | JSP | JSF Answers

1. Air Conditioning Unit

by CodeChum Admin

Construct a class to represent an air conditioning (AC) unit containing the following attributes:

• brand - name of manufacturers like Samsung, LG, Carrier, etc.
• type - whether it is an inverter type or not
• power - represents the status of the AC unit whether it is turned on or not
• thermostat - levels go from 1 to 10
• temperature - levels go from 16 to 30 (in .5 intervals)
• It should have two constructors - one default and another that is overloaded
• default constructor
• sets all the numerical values to the least value as described above
• sets power to off, and type to inverter
• sets brand to "AC Brand"
• prints "Default Constructor"
• overloaded constructor
• accepts brand and type as arguments
• everything else is set to the same values as in the default constructor
• prints "Overloaded Constructor"

More details here, Important!

https://pastebin.com/yx0z0Tfr

import java.util.*;

class App {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

System.out.println("Enter a String: ");

String string = in.nextLine().toLowerCase();

System.out.print("Enter character to find: ");

String characterFind = in.nextLine().toLowerCase();

int index = string.indexOf(characterFind);

System.out.print("Index Position: ");

while (index >= 0) {

System.out.print(index + " ");

index = string.indexOf(characterFind, index + 1);

}

in.close();

}

}

Do this coding without using characterFind

Write a program in java.io package to take a String as input then display first word all capital letters, second word all small letters, third word all capital letters and so on.

Example:

Enter a String

Asia is the largest continent

ASIA is THE largest CONTINENT

Don't use array and split function

import java.util.*;

class App {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

System.out.println("Enter a String: ");

String words[] = in.nextLine().toLowerCase().split(" ");

for (int i = 0; i < words.length; i++) {

if (i % 2 == 0) {

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

} else {

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

}

}

in.close();

}

}

Do this programming without using array and split

Write a program to take a name as input then display the signature as the first letter of each word with dot.

Enter a String

Hubert Blaine Wolfeschlegelsteinhausenbergerdorff Sr

H.B.W.S.

Don't use array and split function

import java.util.*;

class App {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

System.out.println("Enter a String: ");

String words[] = in.nextLine().split(" ");

for (int i = 0; i < words.length; i++) {

System.out.print(words[i].toUpperCase().charAt(0) + ".");

}

in.close();

}

}

Do this coding without using array and split

import java.util.*;

class App {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

String names[] = new String[15];

double salaries[] = new double[15];

double salariesTotal = 0;

for (int i = 0; i < names.length; i++) {

System.out.print("Enter employee name " + (i + 1) + ": ");

names[i] = in.nextLine();

System.out.print("Enter employee salary " + (i + 1) + ": ");

salaries[i] = in.nextDouble();

salariesTotal += salaries[i];

in.nextLine();

}

System.out.println();

for (int i = 0; i < names.length; i++) {

System.out.println("Enter employee name: " + names[i]);

System.out.println("Enter employee salary: " + salaries[i]);

}

double averageSalary = salariesTotal / 15.0;

System.out.printf("The average salary employees: %.2f\n", averageSalary);

in.close();

}

}

Do this coding without using array and printf

Write a program to take a String name as input then display the signature using substring().

Example:

Enter a String

Chandra Bahadur Dangi Ailen Coq

C. Bahadur D. Ailen C.

Don't use Array & Split

import java.util.*;

class App {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

System.out.println("Enter a String: ");

String words[] = in.nextLine().split(" ");

for (int i = 0; i < words.length; i++) {

if (i % 2 == 0) {

System.out.print(words[i].substring(0, 1) + ". ");

} else {

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

}

}

in.close();

}

}

Do this program without using array and split

Write two subclasses of Shape called Circle and Rectangle, as shown in the class diagram.

a) The Circle class contains:

· An instance variable radius (double).

· Three constructors as shown. The no-arg constructor initializes the radius to 1.0.

· Getter and setter for the instance variable radius.

· Methods getArea() and getPerimeter().

· Override the inherited toString() method, to return "A Circle with radius=xxx, which is a subclass of yyy", where yyy is the output of the toString() method from the superclass.

b) The Rectangle class contains:

· Two instance variables width (double) and length (double).

· Three constructors as shown. The no-arg constructor initializes the width and length to 1.0.

· Getter and setter for all the instance variables.

· Methods getArea() and getPerimeter().

· Override the inherited toString() method, to return "A Rectangle with width=xxx and length=zzz, which is a subclass of yyy", where yyy is the output of the toString() method from the superclass.