how does the exceptions work here?
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Scanner;
import java.io.File;
public class TaskPerf6 {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
String uname;
String pass;
int op;
while(true){
System.out.println("\n1--> Login");
System.out.println("2-->. Register");
System.out.println("3-->. Exit\n");
op = sc.nextInt();
if(op == 1){
System.out.println("\nEnter Username : ");
uname = sc.next();
System.out.println(" Enter password : ");
pass = sc.next();
login(uname,pass);
}
else if(op == 2){
System.out.println("\nEnter Username : ");
uname = sc.next();
System.out.println(" Enter password : ");
pass = sc.next();
register(uname,pass);
}
else if(op == 3)
{
System.exit(0);
}
else{
System.out.println("\nWrong Choice");
}
}
}
static void login(String uname,String password){
try{
boolean flag =false;
File fileObj = new File("C://Users//Patrick//Downloads//1records.txt");
String d = uname+password;
Scanner myReader = new Scanner(fileObj);
while (myReader.hasNextLine()) {
String data = myReader.nextLine();
if(data.equals(d))
{
flag=true;
break;
}
}
if(flag){
System.out.println("Successfully logged in");
}
else{
System.out.println("Incorrect username or password");
}
}
catch(Exception e){
System.out.println("\n Error!"+e);
}
}
static void register(String uname,String pass){
try{
FileWriter myWriter = new FileWriter("C://Users//Patrick//Downloads//1records.txt",true);
myWriter.append(uname);
myWriter.append(pass);
myWriter.append("\n");
myWriter.close();
System.out.println(" \nRegistered Successful \n ");
}
catch(Exception e){
System.out.println("\n Error!"+e);
}
}
}
Answers
In this Java code, exceptions play a role in handling unexpected events during file I/O operations for login and registration processes.
The code imports necessary classes such as BufferedReader, BufferedWriter, FileReader, FileWriter, and File, which are involved in reading and writing to a file. The main method provides a menu for users to either log in, register, or exit. In the login and register methods, the code employs try-catch blocks to handle exceptions that may occur during file I/O operations. In the login method, a file is read, and the code scans the file line by line to match the entered username and password. If an exception occurs during the file reading process, the catch block will handle the error and display an error message.
Similarly, in the register method, the code writes the entered username and password to a file. If an exception occurs during the file writing process, the catch block will handle the error and display an error message. In both cases, the System.out.println statements are used to display messages to the user, either indicating success, an error, or incorrect input. Overall, the exception handling in this code ensures that unexpected events during file I/O operations are managed gracefully without crashing the application.
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Related Questions
Discuss two business information systems that are used in two different sectors in a modern economy.
Answers
Explanation:
Two business information systems that are used in two different sectors in a modern economy are:
Transaction Processing System (TPS):
The Transaction Processing System (TPS) is a type of data system for capturing, storing, updating and recovering a company's data operations. Transaction systems often try to provide consistent response times to requests even if this is not as important as in real-time systems.
Management Information System (MIS)
MIS is the study of persons, technological systems and associations between them. Management Information Systems (MIS) Professionals at MIS allow businesses to profit maximally from staff, facilities and business process expenditure. MIS is a field of people with a focus on technological support.
Who want to play among us?
Serves: Europe
Code: AMOFMF
Answers
Answer:
i can't rn
Explanation:
Implement the function printTwoLargest that inputs an arbitrary number of positive numbers from the user. The input of numbers stops when the first negative or zero value is entered by the user. The function then prints the two largest values entered by the user. If fewer than two distinct positive numbers are entered a message to that effect is printed instead of printing any numbers. Hint: Duplicates will cause problems. Try to make sure that you find a way to ignore them.
Answers
Answer:
The function in Python is as follows:
def printTwoLargest():
chk = 0
list1 = []
num = int(input("Enter: "))
while num > 0:
for i in list1:
if i == num:
chk+=1
break;
if chk == 0:
list1.append(num)
chk = 0
num = int(input("Enter: "))
list1.sort()
if len(list1) >= 2:
print("Largest:", list1[-1])
print("Second:", list1[-2])
else:
print("Length of list must be at least 2")
Explanation:
This defines the function
def printTwoLargest():
This initializes a check variable to 0
chk = 0
This initializes an empty list
list1 = []
This prompts the user for input
num = int(input("Enter: "))
The following loop is repeated until input is 0 or negative
while num > 0:
The following for loop checks for duplicate
for i in list1:
if i == num: If duplicate is found
chk+=1 The check variable is set to 1
break; And the for loop is exited
The input is appended to the list if the check variable is 0 (i.e. no duplicate)
if chk == 0:
list1.append(num)
This sets the check variable back to 0, for another input
chk = 0
This prompts the user for another input
num = int(input("Enter: "))
This sorts the list
list1.sort()
This prints the two largest if valid user input is 2 or more
if len(list1) >= 2:
print("Largest:", list1[-1])
print("Second:", list1[-2])
if otherwise, this prints that the length must be at least 2
else:
print("Length of list must be at least 2")
Chapter 7: Investigating Network Connection Settings Using a computer connected to a network
1. What is the hardware device used to make this connection (network card, onboard port, wireless)? List the device’s name as Windows sees it in the Device Manager window.
2. What is the MAC address of the wired or wireless network adapter? What command or window did you use to get your answer?
3. For a wireless connection, is the network secured? If so, what is the security type?
4. What is the IPv4 address of the network connection?
5. Are your TCP/IP version 4 settings using static or dynamic IP addressing?
6. What is the IPv6 address of your network connection?
7. Disable and enable your network connection. Now what is your IPv4 address?
Answers
To know the hardware device used for network connection (network card, onboard port, wireless), One need to open the Device Manager window. You can access it by right-clicking on the Start button, selecting "Device Manager," and then making wider the "Network adapters" category.
What is the hardware deviceTo find MAC address, use ipconfig /all in Command Prompt or PowerShell. Find the network adapter and locate the MAC address (Physical Address).
To check wireless security, right-click connection icon, select "Open Network & Internet settings," click "Wi-Fi," choose network and view security type. Use ipconfig in Command Prompt/Powershell to find network IPv4 address.
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According to a survey conducted by the technology market research firm the radicati group, u. S. Office workers receive an average of e-mails per day (entrepreneur magazine website). Assume the number of e-mails received per hour follows a poisson distribution and that the average number of e-mails received per hour is five.
Answers
The Radicati Group survey suggests that on average, US office workers receive 120 e-mails per day. This number follows a Poisson distribution, with an average of 5 e-mails received per hour.
The Radicati Group survey suggests that on average, US office workers receive 120 e-mails per day. This number of e-mails follows a Poisson distribution, which is a mathematical probability distribution used to model the number of events that occur in a given time or space. This type of distribution is commonly used in the modeling of random events, such as the number of emails received in a given period of time. In this case, the average number of e-mails received in an hour is five, meaning that the expected number of e-mails received in one day is 120. Although the exact number of e-mails received in a day will vary from worker to worker, the Poisson distribution allows us to calculate the probability of a certain number of e-mails being received in a given day. It is important to note that the Poisson distribution is only an estimate and that the actual number of e-mails received may be more or less than the expected number.
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range paramters - for loop
question in picture
Answers
Answer:
start,stop,step_size
Explanation:
Starting at 5 to for loop will count backward by 1 (hence the step_size being -1) until it reaches 0 (stop).
which of these is not a property of a variable? select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a name b value c operations d memory address
Answers
The answer is d) memory address.
A variable is a named storage location in a computer program that can hold a value. It is used to store and manipulate data during program execution. Let's go through the properties of a variable to understand why "memory address" is not one of them:
a) Name: A variable has a name that is used to refer to it within the program. The name is chosen by the programmer and should be unique within the scope of the program.
b) Value: A variable can hold a value, which can be of various types such as numbers, strings, or objects. The value stored in a variable can be assigned, retrieved, and modified during program execution.
c) Operations: Variables can participate in operations and calculations. They can be used in expressions, assigned new values, or used as operands in various mathematical or logical operations.
d) Memory address: This is not considered a property of a variable. A memory address refers to the physical location in the computer's memory where a value is stored. While variables are associated with memory addresses in computer systems, the memory address itself is not a property of the variable that the programmer typically needs to work with directly. It is the responsibility of the underlying programming language and the computer's memory management system to handle memory addresses.
Therefore, the correct answer is d) memory address, as it is not a property of a variable that the programmer typically interacts with directly.
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What's true about OOP in C++? o One class per .hl.cpp file combination:
a. "this" is a pointer in C++ and therefore we use -> to access from it
b. In C++ structs are fully OOP but it changes the base assumption of visibility from private to public
c. Generally follows a pattern of forward declaration in a .h file and definitions in a .cpp file
d. We can directly deference this to use the dot-operator similar to Java: *this.doStuff()
Answers
Modularity facilitates troubleshooting. When working with object-oriented programming languages, you know exactly where to search for problems.
The only difference is in syntax, not in concept. Instead of line-by-line keywords, Visibility Modifiers are categories. Object-Oriented Programming (OOPs) is a programming paradigm based on the concept of an object, which includes attributes and methods. It integrates a collection of linked features and behaviors into a single unit called a class, which improves program design structure and code readability. Object-oriented programming is supported by three fundamental pillars: encapsulation, inheritance, and polymorphism. Modularity facilitates troubleshooting. When working with object-oriented programming languages, you know exactly where to search for problems.
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Which query wizard allows the user to choose the field that will be calculated for each row and column intersection
Answers
Answer:
ur mom
Explanation:
sorry on a times exam and I need answers
The code to perform a binary search is below. Match the variable name with what it holds.
first = 0
last = len(data) - 1
done = False
numberPasses = 0 while first <= last and not done:
middle = (first + last) // 2
numberPasses =
numberPasses + 1
if data[middle] == 10:
done = True
else:
if data[middle] > 10:
last = middle - 1
else:
first = middle + 1
(This is a matching thing and the terms last, middle, and first are supposed to be matched in order to the options below I’ll give branliest!!)
-the index of the center item in the list being considered
-the index of the rightmost member of the list being considered
-the index of the leftmost member of the list being considered
Answers
Answer:
First - The index of the leftmost member of the list being considered
Middle - The index of the center item in the list being considered
Last - The index of the rightmost member of the list being considered
Explanation:
Got it right on EDG. Sorry if I'm a little late but have a good day!
State whether the given statement is True/False. Arguments are the input values to functions upon which calculations are performed.
Answers
Bundlr is an example of gatekeeper technology.
Group startsTrue or False
Answers
Answer:
False
Explanation:
What are the options included in the Illustrations command group? Check all that apply O Pictures and Online Pictures Tables SmartArt Screenshot Tool Animations
Answers
Answer:
A. Pictures and Online Pictures.
C. SmartArt.
D. Screenshot Tool
Explanation:
Microsoft Excel is a software application designed and developed by Microsoft Inc., for analyzing and visualizing spreadsheet documents.
A spreadsheet can be defined as a file or document which comprises of cells in a tabulated format (rows and columns) typically used for formatting, arranging, analyzing, storing, calculating and sorting data on computer systems.
There are five (5) options included in the Illustrations command group of the Microsoft Excel software application and these are;
I. Pictures: this command or button is used to add images from a document (file) saved on a local computer.
II. Online Pictures: it is used for adding images from an online source such as blogs, websites etc.
III. SmartArt: this button is used to add graphical diagrams to a spreadsheet using styles such as process, matrix, relationship, picture, pyramid, list etc.
IV. Screenshot Tool: this is used for taking a snapshot of any window open on the computer i.e screen clipping.
V. Shapes: this comprises of various shapes such as lines, basic shapes, rectangles, equation shapes, block arrows, and flowchart.
James wants to buy a pair of pants for $60.
When he went to the store he found that the
price was marked down by 20%. How much do
they cost now?
Answers
Which of the following is the best description of the [Drive for] block?
A. Moves the VR Robot backward indefinitely.
B. Moves the VR Robot left or right.
C. Moves the VR Robot forward or backwards a specific distance.
D. Moves the VR Robot forward indefinitely
Answers
if you buy a new computer game that emphasizes graphics, or new photo/video editing software for your desktop computer, you may want to purchase a new what?
Answers
If you buy a new computer game that emphasizes graphics, or new photo/video editing software for your desktop computer, you may want to purchase a new graphics card.
A graphics card is a computer hardware component that enhances the visual quality of images, videos, and games on a computer screen. It is responsible for rendering and processing graphical data and delivering it to the monitor. Upgrading your graphics card can significantly improve your computer's performance, allowing you to enjoy high-quality graphics and smoother game play.A graphics card, also known as a video card or GPU (Graphics Processing Unit), is a hardware component responsible for rendering and displaying high-quality graphics on your computer monitor. It plays a crucial role in enhancing the visual experience and performance of graphics-intensive applications like games and photo/video editing software. Upgrading your graphics card can significantly improve the graphical capabilities and overall performance of your computer when running such applications.
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Assignment: Blues Progression
Blues is a sub-genre of jazz that follows some specific guidelines: specifically, the Blues scale and the Blues chord progression.
In this assignment, you’ll write out a 12-bar Blues chord progression. This assignment is a MuseScore assignment. Do not turn in this document for grading.
Directions:
1. Create a new document in MuseScore
a. For the title, write “MuseScore Assignment: Blues”.
b. For the composer, write your name., then click "next".
c. Under "general", choose “Grand Staff”, then click “Next”.
d. Choose G major for your key signature (1 sharp), then click next.
e. Choose “Piano” (in the Keyboards section) for your instrument. (This step may or may not show for you. It's ok either way!)
f. Choose 4/4 for your Time Signature and 12 measures for number of measure.
g. Click “Finish”.
2. In the Bass Clef, write out a 12-bar Blues Chord Progression.
a. Use whole notes for your chords
b. I – I – I – I – IV – IV – I – I – V7 – IV – I – V7
Save your assignment (with your name!) and submit it to the Composition: Blues Progression Dropbox basket. Turn in the MuseScore file only.
Answers
Explanation:
I can provide you with the 12-bar Blues chord progression as you requested:
In the key of G major:
I (G) – I (G) – I (G) – I (G)
IV (C) – IV (C) – I (G) – I (G)
V7 (D7) – IV (C) – I (G) – V7 (D7)
The Roman numerals in parentheses represent the chords to play in each measure, and the chord names outside the parentheses indicate the actual chords to play in the key of G major.
What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server?
Answers
The existence of an Automatic Private IP Address (APIPA), often measured in the format of 169.254.x.x, is a telltale sign that a Windows computer has fallen short to procure an IPv4 address from a DHCP server.
What are the roles of APIPA addresses?APIPA addresses are exclusively refined for communication within a localized network, posing no route on the internet as they are naively set up by the gadget.
Thus, if a Windows machine is given an APIPA, it implies that this device could not retrieve an IP address from a DHCP server.
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The value 5 is stored in a signed (2's complement) integer. The bits are shifted 4 places to the right. What is the resultant value (in decimal)? 0.3125
Answers
Answer:
The resultant value is 0
Explanation:
Solution
Given that:
Now
The +5 representation in signed 2's complement integer: 00000101
Thus
When we right shift then, 4 rightmost bit (0101) will be dropped.
The number after 4-bit right shift: 00000000
Therefore the resultant value after 4-bit right shift is "0" in decimal.
For your spring campaign, you're trying to influence consideration with your users. Which ad format would best support this goal?
Answers
To influence consideration with your users for your spring campaign, the best ad format to use would be video ads. Video ads can provide a more immersive experience for users and can showcase the benefits and features of your product or service in a visually engaging way.
Additionally, video ads can help build brand awareness and establish an emotional connection with your target audience, ultimately leading to increased consideration and conversion rates.
For your spring campaign, if you aim to influence consideration among users, the ad format that would best support this goal is the "Native Advertising" format. Native ads blend seamlessly with the surrounding content, making them less intrusive and more engaging for users, which can effectively drive consideration.
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what apps would you recommend for doing aesthetic school work on laptop
Answers
Answer:
Explanation:
you could get really cute and aesthetic backgrounds and pics from there
An algorithm is a guiding rule used to solve problems or make decisions. Please select the best answer from the choices provided T F
Answers
True. An algorithm can be defined as a step-by-step procedure or a set of rules designed to solve a specific problem or perform a particular task.
It serves as a guiding rule for problem-solving or decision-making processes. Algorithms are used in various fields, including computer science, mathematics, and even everyday life.
In computer science, algorithms are fundamental to programming and software development. They provide a systematic approach to solving complex problems by breaking them down into smaller, manageable steps.
Algorithms can range from simple and straightforward to highly complex, depending on the nature of the problem they aim to solve.
The importance of algorithms lies in their ability to provide a structured and efficient solution to a given problem. They help in achieving consistency, accuracy, and reproducibility in decision-making processes. Additionally, algorithms enable automation and optimization, allowing for faster and more reliable problem-solving.
It is essential to acknowledge and respect the originality and intellectual property of others when using algorithms developed by someone else. Proper citation and avoiding plagiarism are crucial to ensure the integrity of one's work and uphold ethical standards.
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Now that he is employed, Martin wants to start making plans to purchase a new home. Martin's plan to save up for a down payment within 1 to 5 years is an example of a(n) __________-term goal. Group of answer choices
Answers
Answer:
long term goal
Explanation:
A long-term goal is an achievable a person seeks to accomplish within a certain period of time, typically in years. A series of short-term goals can sum up to a long-term goal. Martin's down payment plan to get a loan on a house within 5 years is a long term goal
During Which model states that communication can occur simultaneously?
Answers
Answer:
i dont see any models...please include a picture
identify navigation/mission planning information that is sent to the av when the remote pilot uploads a flight plan using telemetry?
Answers
Waypoints, altitude, speed, and other flight characteristics are among the navigation/mission planning details transmitted to the AV (Autonomous Vehicle) when a remote pilot uploads a flight plan utilising telemetry.
What is a geographic location for a flight path identified by the position's latitude, longitude, and altitude programmed in sequence?A waypoint is a predetermined geographic location that is specified by latitude/longitude coordinates in the context of RNAV (altitude is ignored).
What kind of map do navigators use to draw straight paths for ships and aeroplanes?Because any straight line drawn on a Mercator chart is also a line of constant course, sometimes known as a rhumb line or loxodrome, the majority of nautical charts employ this projection.
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when fully developed, apex's net-centric plans are automatically updated to reflect changes in dynamic threat assessments, guidance, or environment changes. this is referred to as _____.
Answers
Dynamic planning is a critical component of APEX's net-centric approach, which relies on automated updates to ensure that plans remain current and effective.
With dynamic planning, changes in threat assessments, guidance, or environmental conditions are automatically incorporated into the system's plans, helping to ensure that operators have access to the most up-to-date information available. This approach streamlines decision-making processes and enables operators to respond quickly and appropriately to changing conditions, without requiring manual intervention.
Dynamic planning also helps to minimize the risk of errors or oversights that can occur when plans are updated manually, providing a higher degree of accuracy and reliability. In short, dynamic planning is a key feature of APEX's net-centric approach, enabling the system to adapt and adjust to changing circumstances in real-time, and ensuring that operators have the information they need to make informed decisions.
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The concept described is called Adaptive Planning and Execution (APEX). It is a planning system that adjusts automatically in response to changes in threat assessments, guidance, or environment.
When fully developed, Apex's net-centric plans are updated automatically to reflect changes in dynamic threat assessments, guidance, or environment changes. This is a concept referred to as Adaptive Planning and Execution (APEX). APEX is a system that is designed to deliver agile and adaptive planning capabilities. It allows for the concurrent planning and execution of operations, accommodating for constant changes in various factors such as the threat landscape, guidance provided, and the operating environment. This adaptive process ensures that the planning remains relevant and accurate in a rapidly changing setting.
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__________________ is the system for creating the illusion of depth using the combination of horizon line, vanishing point(s), and convergence lines.
Answers
The system for creating the illusion of depth using the combination of horizon line, vanishing point(s), and convergence lines is called perspective.
This technique has been used in art for centuries to give a sense of three-dimensional space to a two-dimensional surface. Perspective is achieved by drawing parallel lines that appear to converge at a single point on the horizon line, which is typically placed at the eye level of the viewer.
This creates the illusion of distance and depth in a composition. Different types of perspective, such as one-point perspective and two-point perspective, can be used to create different effects in a work of art.
Mastery of perspective is an important skill for artists, architects, and designers to have in order to create realistic and visually engaging compositions.
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The tree is at (2, 4) and the range is 3 meters. The bush is at (7, 5) and the range is 2 meters. Finally, the pond is at (5,7) and the range is 3 meters – what is the robot’s position?
Answers
Answer:
32
Explanation:
There is no Chapter 5, nor is there a section on tangents to circles. The curriculum is problem-centered, rather than topic-centered.
Sean wants to build a robot. What part of the robot will he need to include that enables the robot to process sensory information?
Answers
To enable a robot to process sensory information, Sean will need to include a sensor system as part of the robot. The sensor system will provide input to the robot's central processing unit (CPU) or microcontroller, allowing it to perceive and respond to its environment. The specific sensors needed will depend on the robot's intended function and the type of sensory information it needs to process. Common sensors used in robots include cameras, microphones, touch sensors, and proximity sensors.
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how to get bing with any node unblocker
Answers
Answer:
rawr xD broooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
Explanation:
UwUOwO<3