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Thread: I cannot get the right output in the right place. Where is my problem?

  1. #1
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    Default I cannot get the right output in the right place. Where is my problem?

    this is the outpu that i am getting:

     Transpose
    The encrypted message is 
    wkh txlfn eurzq ira 
    The decrypted message is 
    the quick brown fox 
     
    The encrypted Transpose message is 
    wkh txlfn eurzq ira        
    The decripted Transpose message is 
    eht kciuq nworb xof       <--------------------- I need this to be on encrypted Transpose and here it should be the decrypted message like on the first one
     
    Reverser
    The encrypted Reverse message is 
     xof nworb kciuq eht 
    The decrypted Reverse message is 
    qeb nrfzh yoltk clu   <-------------------- I also need the decrypted message here like on the first one

    I believe the problem is in my methods (loop), but i have tried every possible configuration of the loop and this is as close as I can get it to the right output. Here is the code of all the classes.


    package assignment2;
     
    public class Caeser extends Cipher
    {
    	public Caeser(String s)
    	{
    		super(s);
    	}
    	public String encode(String word)
    	{
    		StringBuilder result = new StringBuilder();
     
    		for (int i = 0; i < word.length(); i ++)
    		{
    			char ch = word.charAt(i);
    			ch = determineCharacter(ch, Constants.ENCODE_SHIFT);
    			result.append(ch);
    		}
    		return result.toString();
    	}
     
    	public String decode(String word)
    	{
                StringBuilder result = new StringBuilder();
     
    		for (int i = 0; i < word.length(); i ++)
    		{
    			char ch = word.charAt(i);
    			ch = determineCharacter(ch, Constants.DECODE_SHIFT);
    			result.append(ch);
    		}
    		return result.toString();
     
     
    	}
     
    public char determineCharacter(char ch, int shift)
    	{
    		if(Character.isLowerCase(ch) || Character.isUpperCase(ch))
    			ch = (char)('a' + (ch - 'a' + shift) % Constants.WRAP_AROUND);
    		return ch;
    	}
    }
     
    package assignment2;
     
    public class Transpose extends Cipher
    {
    	Transpose(String s)
    	{
    		super(s);
    	}
    	public String encode(String word)
    	{
    	StringBuilder result = new StringBuilder();
     
     
    		for (int i= 0; i < word.length(); i++)
    		{
    			char ch = word.charAt(i);
    			ch = determineCharacter(ch, Constants.ENCODE_SHIFT);
    			result.append(ch);
    		}
    		return result.toString();
    	}
    	public String decode(String word)
    	{
    	StringBuilder result = new StringBuilder();
     
                    for (int i = word.length()-1;i >=0; i --)
                   {
                    char ch = word.charAt(i);
    			ch = determineCharacter(ch, Constants.DECODE_SHIFT);
    			result.append(ch);
    		}
    		return result.toString();
    	}
     
     
    public char determineCharacter(char ch, int shift)
    	{
    		if(Character.isLowerCase(ch) || Character.isUpperCase(ch))
    			ch = (char)('a' + (ch - 'a' + shift) % Constants.WRAP_AROUND);
    		return ch;
    	}
     
     
    }
    package assignment2;
     
     
    public class Reverser extends Transpose
    {
    	Reverser(String s)
    	{
    		super(s);
    	}
     
    	String reverseText(String word)
    	{
    	    StringBuilder result = new StringBuilder();
                for (int i = word.length()-1;i >=0; i --)
                    {
                    char ch = word.charAt(i);
    			ch = determineCharacter(ch, Constants.DECODE_SHIFT);
    			result.append(ch);
    		}
    		return result.toString();
    	}
     
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: I cannot get the right output in the right place. Where is my problem?

    You need to try debugging the code by adding printlns to show the values of the variables as they change.

    Where is the driver code that calls the other code and prints out the results?

  3. #3
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    Default Re: I cannot get the right output in the right place. Where is my problem?

    Quote Originally Posted by Norm View Post
    You need to try debugging the code by adding printlns to show the values of the variables as they change.

    Where is the driver code that calls the other code and prints out the results?
    This?

    package assignment2;
     
    import javax.swing.JOptionPane;
     
    public class Main {
     
        public static void main(String arg[]) {
            String code, output = "";
     
            String text = JOptionPane.showInputDialog("Enter message");
     
            output += "The original message is \n" + text + "\n";
     
            Cipher c = new Caeser(text);
            c.encrypt();
            code = c.getEncodedMessage();
            output += "\nCeasar Cipher\nThe encrypted message is \n" + code + "\n";
            c.decrypt(code);
            code = c.getDecodedMessage();
            output += "The decrypted message is \n" + code + "\n";
     
            c = new Transpose(text);
            c.encrypt();
            code = c.getEncodedMessage();
            output += "\nTranspose\nThe encrypted Transpose message is \n" + code + "\n";
            c.decrypt(code);
            code = c.getDecodedMessage();
            output += "The decripted Transpose message is \n" + code + "\n";
     
            Reverser r = new Reverser(text);
            r.encrypt();
            code = r.reverseText(r.getEncodedMessage());
            output += "\nReverser\nThe encrypted Reverse message is \n" + code + "\n";
            code = r.decode(code);
            output += "The decrypted Reverse message is \n" + code;
     
            System.out.println(output);
        }
    }

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: I cannot get the right output in the right place. Where is my problem?

    Your code does not compile. Its missing the Cipher class and the Constants class

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