We have been tasked to create a Vigenere Cipher. At this stage however, I am attempting to get the program to encrypt a phrase using a single letter key (Caesar cipher), before progressing to the final stage, implementing a functioning Vigenere Cipher. The code below is able to encrypt a word, capatalise it, remove white space and shift it a certain amount of places, given the provided letter. My problem is that because the single letter is a String, not a char, the phrase is being shifted incorrectly. For example, when the program is given the Inputs: This is a test with the single letter key A, the program shifts all the characters by 1. The output however should read THISISATEST as A is supposed to be 0.
import java.util.Scanner;
public class VigenereCipher {
public static void main(String[] args)
{
char c;
I am trying to encrypt a string using substitution cipher, the program doesnt show any errors but the output is not what is expected. On encryption it shows random characters whereas i want it to be encrypted by another letter. This is what I have done:
/* Encryption using substitution */
import java.io.*; public class SSExp1 { public static void main(String args[]) { char[] ip= new char[20]; char[] op= new char[20]; char key = '3'; String b;
I'm building casar cipher with using ASCII. I'm done changing lower and upper case alphabet, but I don't know how to fix my code for changing number 9 to <.
here is my class code.
public class SimpleMessageCipher implements MessageCipher { public String encode(String plainText,int shiftKey){ String cipherText=""; for(int i=0;i<plainText.length();i++) { //stores ascii value of character in the string at index 'i' int c=plainText.charAt(i);
I have been assigned to make a program that encodes and decodes a given message with the given key (spaced numbers, for example: 3 1 7 4 2 5). I'll post the code for all the classes that I am using below.
QueueInterface:
import java.util.*; public interface QueueInterface<T> { T dequeue() throws QueueUnderflowException; boolean isEmpty();
Because those are the ones I had to write myself, the others were given to us to use. As far as these classes go, they work fine without causing any errors from the input I give. For example if I enter a message and a key, it correctly encodes and decodes the message with the given key. What I'd like for you fine programmers to do is give feedback on those 6 classes. Like, suggestions on how to make them better or more efficient, neater, changing any of the methods to make them more efficient or prevent any errors beforehand, etc.
I have an program with an encryption and a decryption method, it works fine when i specify a name for the encrypted file, but i want the name for the encrypted file to be in cipher text, how do i do this and specify the path? i have marked out the "encryptionPath" specifically for specifying the location of the encrypted file which will have a cipher text name.
I was tasked with creating a program that encrypts a line of text (for example, CANDY) by shifting the letters X amount of times. For example, if the user inputs the sentence CANDY and selects a shift of 5, the output would be: HFSID. I got this part working fine. The issue I am having is with the decryption part of the program.
This is simply the reverse of the above, as the user would enter the phrase HFSID, with a shift of 5, and the program would output: CANDY. It works fine, all except for one letter, being the "F" letter. With my code, when I enter the above word to be decrypted it outputs: C[NDY
Obviously, that [ bracket is not an 'A'. I realise the issue falls with the equation, Here is my code:
public class SimpleEncryption {
/** * @param args the command line arguments */ static int answer; public static void main(String[] args) { String cipher = JOptionPane.showInputDialog(null, "Please enter a sentence or word that you wish to encode or decode. This program uses" + " a basic cipher shift.");
I have following Cipher Code and test for it. But I am getting following exception.
Java Code:
java.lang.IllegalStateException: Cipher not initialized at javax.crypto.Cipher.checkCipherState(Cipher.java:1672) at javax.crypto.Cipher.doFinal(Cipher.java:2079) at com.anjib.util.CipherUtil.encrypt(CipherUtil.java:67) at com.anjib.util.CipherTest.testEncryptDecrypt(CipherTest.java:23) mh_sh_highlight_all('java'); Java Code: public class CipherUtil { private static Logger log = Logger.getLogger(CipherUtil.class);
I want to encrypt a file and decrypt it on another host. For decryption on another host I guess I need to transfer the cipher... how can this be done? How can you write a Cipher to disk?Or am I completely on a wron track?
The following code is doing it already on one host:
I'm trying to make a simple Caesar cipher that takes in a String as the first argument and a integer shift as the second argument. Namely, there appears to be a problem with the loop and how I have declared the array - I want the converted characters to be put into a new array called newCharacterArray, converted back to a String and displayed in the command prompt window.
public class Caesar { public static void main(String inString, int k) { System.out.println("String: " + inString); char inStringArray[] = inString.toCharArray();
In the class below I'm trying to create a class that will accept dates in various formats and create a range. The first constructor is easy because I send it the begin date and end date as Date objects. Now I want to send a month(and year) in a constructor and derive the begin and end dates from it. In my constructor that accepts the month/year I need to put the this(startDate, endDate) at the top to be allowed, but the parameters are not built yet.
package com.scg.athrowaway; import java.util.Calendar; import java.util.Date; public class DateRange { private Date startDate; private Date endDate;
I'm having some difficulty with my bank account project. I'm supposed to create a menu where the user can create a new account, withdraw, deposit, view their balance, and exit. There's issues with the account creation.
Here's my necessitated class below: BankAccount, TestBankAccount, SavingsAccount, CurrentAccount, and Bank
I certify that this assignment is my own work and that I have not copied in part or whole or otherwise plagiarized the work of other students and/or persons.
I'm new to Java and I have an assignment to create a Sphere class that will allow you to create Sphere objects using the code below. Then create a program called SphereTester that prompts the user for the radii of two spheres in meters. The program should display which sphere is larger and by how many cubic meters and display only four digits after the decimal point. I have the sphere class given to us for the assignment which is this:
Java Code: public class Sphere { // instance variable (i.e., a field) private double radius; // constructor for the Sphere class public Sphere(double r) { radius = r;
I hava little bit of knowlodge in VBA.. I hava a small project related to processing large data.. I need to create a GUI.. I have installed Eclipse software
My progest requie
1.Creating a GUI
2.I need show data folder(consisting 100s of files) from GUI and all files in folder should be moved to each folder with same name as of file name.
i have jsp file and inside i have list that i get from my servlet . i want to create in the bottom of the page the option to move from one page to another like this " page: 1,2,3,4,5"i try to use the tag <a href=.. and onclick() event ,and i understand that javascript will not work , how can i create the " page: 1,2,3,4,5" ?
I am trying to create a class (DVD) with an instance variable that references a map, the constructor for this class must create an empty map and assign it to the instance variable map. I want to populate this map with instances of a different class called tv series, I am using blueJ, I am not sure why this doesn't work
Java Code:
import java.util.*; public class DVD { public static Map<String, TvSeries>DVD; public TvSeries program;
I'm having trouble creating two new die objects for the PairofDie class. I'm trying to run two separate die and print the face value and then add both numbers up and print those values as well.
public class Die { private final int MAX = 6; private int faceValue; //private int faceValue2; public Die(){ faceValue = 1;
[Code] .....
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
The method Die() is undefined for the type PairofDice The method Die() is undefined for the type PairofDice at PairofDice.main(PairofDice.java:6)
I would like to create a custom tag which works similar to <c:forEach/> tag i.e
<c:forEach var = "movie" items = "${collection}> ${movie} </c:forEach>
I would want to create the similar behaviour(as above) in my own custom Tag.Morever I would like to use the doStartTag() and doEndTag() and doAfterBody() methods while creating custom Tag.
how to create a JAR File I have been watching you tube and it seems like the manifest needs to be remade. I go to the CMD and find my project folder class. I think I need to use do the same for all the classes correct. Well I type jar -cf TictacToeGUIGame.jar *java then I get no such directory. I can see the it worked thought. So do i do this to all my classes and then I will have my JAR program?
Codebase: myserver.com Permissions: sandbox Application-Name: Dynamic Tree Demo
error message from command line:
C:UsersxxxxDesktopCOMP268applet_ComponentArch_DynamicTreeDemoapplet_Comp onentArch_DynamicTreeDemouildclasses>jar -cvfm DynamicTreeDemo.jar mymanifest .txt appletComponentArch java.io.IOException: invalid header field name: ?≫?Codebase at java.util.jar.Attributes.read(Attributes.java:433) at java.util.jar.Manifest.read(Manifest.java:199) at java.util.jar.Manifest.<init>(Manifest.java:69) at sun.tools.jar.Main.run(Main.java:172) at sun.tools.jar.Main.main(Main.java:1177) [/code] encoding in UTF-8 and have newline at end
