Explain in your own words: a.) When writing data to a file, what is the difference between the print and the println methods? b.) What does the Scanner class’s hasNext method return when the end of the file has been reached?
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Explain in your own words:
a.) When writing data to a file, what is the difference between the print and the println methods?
b.) What does the Scanner class’s hasNext method return when the end of the file has been reached?
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- I am trying to figure out why the sum at the end of my Java code is not working correctly. It keeps showing as zero and I do not know what the issue is. Here is the program requirements Write a program in a single file that: Main: Creates 10 random doubles, all between 1 and 11, Calls a method that writes 10 random doubles to a text file, one number per line. Calls a method that reads the text file and displays all the doubles and their sum accurate to two decimal places. SAMPLE OUTPUT 10.62691196041722.7377903389094555.4279257388651281.37420580654725091.18587002624988364.1803912764852284.9109699989306755.7108582343439587.7908570073730523.1806714736219543 The total is 47.13 Here is my code: import java.util.*;import java.io.*; public class AssignmentTwo { public static void main(String[] args) {//main method double randNum [] = new double [10]; for(int i = 0; i< randNum.length; i++) { randNum[i] = (double)(Math.random()* (10) + 1);…Answer the given question with a proper explanation and step-by-step solution. 1- Write code that does the following: opens an output file with the filename number_list.txt, uses a loop to write the numbers 1 through 100 to the file, then closes the file.Challenge 3: Encryption.java and Decryption.java Write an Encryption class that encrypts the contents of a binary file. Your encryption program should work like a filter, reading the contents of one file, modifying the data into a code, and then writing the coded content out to a second file. The second file will be a version of the first file, but written in a secret code. Use a simple encryption technique, such as reading one character at a time, and add 10 to the character code of each character before it is written to the second file. Come up with your own encryption method. Also write a Decryption class that reads the file produced by the Encryption program. The decryption file will use the method that you used and restore the data to its original state, and write it to a new file.
- JAVA PPROGRAM Write a program that prompts the user to enter a file name, then opens the file in text mode and reads names. The file contains one name on each line. The program then compares each name with the name that is at the end of the file in a symmetrical position. For example if the file contains 10 names, the name #1 is compared with name #10, name #2 is compared with name #9, and so on. If you find matches you should print the name and the line numbers where the match was found. While entering the file name, the program should allow the user to type quit to exit the program. If the file with a given name does not exist, then display a message and allow the user to re-enter the file name. The file may contain up to 100 names. You can use an array or ArrayList object of your choosing, however you can only have one array or ArrayList. Input validation: a) If the file does not exist, then you should display a message "File 'somefile.txt' is not found." and allow the…How do I write a code that will open the text file for reading, (test.txt), and that prints the first line of the file?Task 3: Summary We would like to be able to generate a summary for each logfile to give us a rough idea of its contents. Instructions Create a file called Summary.java. As with Task 1, open the file for reading in a try-catch block. Read through the entire file, counting how many of each message/event type occurs. Print out a summary with the count of each event/message type. As a sanity check: the total number of message/event type counts should equal 1000. Hint: a useful method could be String.split. Sample Input/Output Example 1: Summary -------------------- Notifications: 322 Warnings: 326 Errors: 352 Cannot find logfile! Exiting...
- <<Write in Java>> - Challenge 7 File encryption is the science of writing the contents of a file in a secret code. Your encryption program should work like a filter, reading the contents of one file, modifying the data into a code, and then writing the coded contents out to a second file. The second file will be a version of the first file, but written in a secret code. Although there are complex encryption techniques, you should come up with a simple one of your own. For example, you could read the first file one character at a time, and add 10 to the character code of each character before it is written to the second file. - Challenge 8 Write a program that decrypts the file produced by the program in Programming Challenge 7. The decryption program should read the contents of the coded file, restore the data to its original state, and write it to another fileUsing Java PrintWriter, write a program that prompts the user for information and saves it to a text file File name is musicians.txt Use this information below: George,Thoroughgood,54321 Ludwig,Van Beethoven,90111 Edward,Van Halen,12345ENGAGE MINDTAP -Using a Counter-Controlled while Loop in Java Using a Counter-Controlled while Loop ? Summary In this lab, you use a counter-controlled while loop in a Java program provided for you. When completed, the program should print the numbers 0 through 10, along with their values multiplied by 2 and by 10. The data file contains the necessary variable declarations and some output statements. Instructions 1. Ensure the file named Multiply.java is open. 2. Write a counter-controlled while loop that uses the loop control variable to take on the values O through 10. Remember to initialize the loop control variable before the program enters the loop. 3. In the body of the loop, multiply the value of the loop control variable by 2 and by 10. Remember to change the value of the loop control variable in the body of the loop. 4. Execute the program by clicking Run. Record the output of this program. Grading When you have completed your program, click the Submit button to record your…
- Write a complete java program that: asks the user for a file name tests whether the file exists and tells the user if it does exist asks the user whether it should be deleted. Either delete or do not delete the file based on the user input. If they don't delete, ask them if they would like to write to the file If they want to write, ask what they want to write to the file and write it. Make sure to provide plenty of console output dialog specifying what status/actions are taken at each step.This is phython not Java Lab: Write a file copying program. The program asks for the name of the file to copy from (source file) and the name of the file to copy to (destination file). The program opens the source file for reading and the destination file for writing. As the program reads each line from the source file and it writes the line to the destination file. When every line from the source file has been written to the destination file, it close both files and print “Copy is successful.” In the sample run, “add.py” is the source file and “add-copy.py” is the destination file. Note that both “add-copy.py” is identical to “add.py” because “add-copy.py” is a copy of “add.py”. Sample run: Enter file to copy from: add.py Enter file to copy to : add-copy.py Copy is successful. Source file: add.py print("This program adds two numbers") a = int(input("Enter first number: ")) b = int(input("Enter second number: ")) print(f"{a} + {b} = {a+b}") Destination…Please design the mapper and reducer for the below WordCount problem. WordCount problem: Given an input text file, count the frequency of each word in the file. Please design the input and output pairs for the Mapper and Reducer, use below table for reference. Input Output We get the "WordCount.jar" file by using the above table. It only contains Mapper and Reducer. There is no Combiner and no Partitioner in this program. Please illustrate how the WordCount.jar program works on the below dataset. This text file only contains one line. Dataset: the sound sounds sound. it is the right right, right? Suppose we run the WordCount.jar program on this file. Suppose that the space symbol, and "?" are all used for separating the words. The outputs of the Mapper are Mapper The outputs of the reducer are Reducer Answer: Are the results sorted alphabetically? When was it sorted? 2 27 20 35
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