Checkpoint 11.39 Write a statement that opens a file Customers.dat as a random access file for both reading and writing. The created object should be fstream. m = new RandomAccessFile("Customers.dat", "rw"); } Submit X Incorrect. Try again.
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- //Beginning of block that handles an input mismatch called e. input.nextLine () ; //Clear buffer. //Print "Invalid entry, try again!" //Set cont so loop re-enters when there's an exception. }//END block }while ( ); //Insert what is tested. }//END setDouble (): void 5. //Code Java statement that releases outputFile to avoid resource-leaks. 6. Which line of code throws the exception for the double? Enter a letter for the answer: A. while (!input.hasNextInt ()) fileName = input.nextLine () ; aDouble = input.nextDouble () : B. с.What happens when the following code segment executes if test.txt does not exist? infile = open("test.txt", "r") Select one: The file test.txt is created as a new empty file The program raises an exception All attempts to read from the file return an empty string All attempts to read from the file return random valuesFilelO 05: Averages from a File Write a FileI005 class with a method named calculateAverage() that takes a filename (as a String). Assume that the file only contains numerical values. Have the method calculate the average of all of the values. Return the average as a Double. If an exception is thrown, display an informative message and return e.0. Example FileI005 driver String filename Double val = new FileI005 (); "numbers0.txt"; driver.calculateAverage ( filename ); // returns 58.3529411764706 filename = "numbers1.txt"; driver.calculateAverage( filename ); // returns 62.699999999999996 %3D val = "numbers2.txt"; driver.calculateAverage( filename ); // returns 56.828571428571436 filename val !!
- 1. Modify it so that it write the contents of String[] into a file named fileLoop1.txt: package stringio; // // import java.util.Scanner; import java.io.*; // public class Stringio { // public static void main(String[] args) throws IOException { File loopfile = new File("fileLoop.txt"); Scanner getAll = new Scanner( loopfile ); // connect a Scanner to the file String num; String[] items = new String[10]; int i = 0; while(getAll.hasNextLine()){ num = getAll.nextLine(); // square = num * num ; //System.out.println("The square of " + num + " is " + square); items[i] = num; System.out.println("items[i] is " + items[i]); i = i + 1; } getAll.close(); } }ExampleTwo This program loops through fileLoop.txt, computation, and display results package charioloop; import java.util.Scanner; import java.io.*; // public class Charioloop { public static void main(String[] args) throws IOException { //Create a reference to the physical file File loopfile = new File("fileLoop.txt"); // connect a Scanner to the file Scanner getAll = new Scanner( loopfile ); int num = 0, square = 0; while(num != -1){ num = getAll.nextInt(); square = num * num ; System.out.println("The square of " + num + " is " + square); } getAll.close(); } } /* Create fileLoop.txt in I:\\Ajava\161\WPPractice\IO\charstream\charioloop My fileLoop.txt looks like this: 2 3\ 2 10 -1 Note:- Study this program and follow the given instruction and execute type the code and provide also output for this java program as soon as possible.Language/Type: Related Links: Author: Java file input Scanner Nick Troccoli (on 2017/04/25) Write a method named classPresidents that tallies votes for presidents of two school classes. Somehow the vote tallies for sophomore and junior class presidents got mixed up! Your method should accept as its parameter a Scanner representing a file of vote results. It should output the next sophomore and junior class presidents. The file format looks like the following: Jared s 25 Sophie j 12 Tom j 44 Isaac s 30 Emily s 60 Russ s 23 Madison j 20 The file repeats the pattern name year votes. The year is either "s" for sophomore or "j" for junior. Your program should output the candidate in each presidential race with the most votes, and how many votes they got. Specifically, if this file were named candidates.txt, your method could be called in the following way: Scanner input new Scanner (new File("candidates.txt")); classPresidents (input); The above call should produce the following output:…
- def get_words(filename): words =[] with open(filename,"r") as file: trainingtext = file.read() words = trainingtext.split(" ") file.close() return words text = "trainingtext.txt" words = get_words(text) for i in words: print(i)Introduction to Computer Systems Project 1 Due: February 09, 2023 by 5:00 PM Spring 2023 Introduction: xxd command in Linux creates a hex dump of a given file or standard input. It's simple. For example, suppose you have a text file 'test.txt' with contents as shown below: The isprint() function checks whether a character is a printable character or not. Check more information in: https://www.programiz.com/c-programming/library-function/ctype.h/isprint Here's how you can use xxd to convert the file contents into hex: $ xxd test.txt And here's the output: 00000000: 5468 6520 6973 7072 696e 7428 2920 6675 00000010: 6e63 7469 6f6e 2063 6865 636b 7320 7768 00000020: 6574 6865 7220 6120 6368 6172 6163 7465 00000030: 7220 6973 2061 2070 7269 6e74 6162 6c65 00000040: 2063 6861 7261 6374 6572 206f 7220 6e6f 00000050: 742e 0a43 6865 636b 206d 6f72 6520 696e 00000060: 666f 726d 6174 696f 6e20 696e 3a20 6874 00000070: 7470 733a 2f2f 7777 772e 7072 6f67 7261 00000080: 6d69 7a2e 636f 6d2f 632d 7072…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...
- 2. Reading Files (40%) Create a class with a method that, given a string representing a file name, returns an integer with the number of characters in the file. For example, if the file has 10 characters, your method must return the number 10.Unix assignment Purpose: The purpose of this assignment is to use various concepts of the C Shell. 0. Change your default login shell to the C Shell. 1. Create a .cshrc file in your home directory that will do the following: * Create the alias (lsall) that will do all of the following: display the date, and a recursive long list of all files in a directory. * Create the alias (whoson) that will display the date and a sorted list of users logged in. * Declare the LOCAL variable that controls the size of your history list to the value 200. * Declare the shell variable that will cause the C Shell to send a message to your terminal whenever one of your background commands complete. 2. Create a .login file in your home directory to do the following. * Declare the GLOBAL Terminal Type variable to the value vt100. Display the value of the variable. Logout and log back in to make sure your .cshrc and .login files are automatically executed. Create a lab8.scr…Exercise 2 (30/40): Write a program that reads in a set of coin descriptions from a file. The input file has the format coinNamel value is coin Valuel coinName2 value is coinValue2 Add a method to your program that receives file content and writes back to another file statistics about the coins. Sample input file Riyal value is 25 Baisa value is 6.0 BHR value is baisa value is 5.30 Riyal value is 23.5 Sample output file Riyal = 24.25 Baisa =5.65 BHR = 9.5 In the solution 1. use the coin class provided on Moodle. 3. Handle any two exceptions to make sure the input file holds the correct transactions format (FileNotFoundException is not one of them) Information: 9.5 ● Illegalargumentexception: The IllegalArgumentException is an unchecked exception in Java that is thrown to indicate an illegal or unsuitable argument passed to a method. It is one of the most common exceptions that occur in Java. InputMismatchException: The InputMismatchException generally occurs when working with Java…