p2p.wrox.com Forums - Java Basics http://p2p.wrox.com en Sun, 22 Nov 2009 00:19:37 GMT vBulletin 60 http://p2p.wrox.com/images/misc/rss.jpg p2p.wrox.com Forums - Java Basics http://p2p.wrox.com Book recommendation for someone new to Java? http://p2p.wrox.com/java-basics/77080-book-recommendation-someone-new-java.html Wed, 18 Nov 2009 20:13:31 GMT Our team is just now getting involved with Java development using the Oracle WebLogic server. None of us has any Java experience and we're looking for a good book that we can use as an initial reference to Java. We all have C# .NET experience and some of us have C/C++ experience, but no Java experience.

Can anyone recommend a good book to get us started with Java?

Thanks for any suggestions.
-Dave ]]> Java Basics DaveHerrmann http://p2p.wrox.com/java-basics/77080-book-recommendation-someone-new-java.html Write multiple object in a single file http://p2p.wrox.com/java-basics/76895-write-multiple-object-single-file.html Wed, 04 Nov 2009 10:45:16 GMT Hello Everybody How are you all? I have some little problem. But there is no suitable solution in the internet. My problem: I want to write multiple... Hello Everybody
How are you all? I have some little problem. But there is no suitable solution in the internet. My problem:

I want to write multiple object in a single file. But i cant. I can write a single object in the file using writeObject() method. Can any one help me to give a better solution? For your kind consideration my code given below:

public void writeObject ( String fullFilename, Object object )
{

// create the object file

File objectFile = new File(fullFilename);

// generic stream to the file

FileOutputStream outStream;

// stream for objects to the file

ObjectOutputStream objStream;



try

{

// setup a stream to a physical file on the filesystem

outStream = new FileOutputStream ( objectFile );



// attach a stream capable of writing objects to the stream that

// is connected to the file

objStream = new ObjectOutputStream ( outStream );

// write object to file

objStream.writeObject( object );



// close down the streams

objStream.close();

outStream.close();

}

catch ( IOException e )

{

logger.error( "could not write object to file ",e);

}

} ]]> Java Basics Shimul Mahmud http://p2p.wrox.com/java-basics/76895-write-multiple-object-single-file.html Crypto question http://p2p.wrox.com/java-basics/76790-crypto-question.html Tue, 27 Oct 2009 20:29:38 GMT I'm taking my first programming class, and we're using java. I've been getting the hang of everything so far, but functions are starting to leave me in the dust I think. I'm currently working on a project that is supposed to encrypt or decrypt a phrase, and I'm stuck.

I'm not sure how to convert a phrase the user inputs from the 'key' string (correct alphabet) to my 'alpha' string (jumbled alphabet). Can anyone help me out?

Here is the program so far:

Code:
import java.util.*;

public class Crypto {

  static Scanner input = new Scanner(System.in);
  static String alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  static String key = "UBWKOVGAPRFJLCQHZENSXDMYTI";
   
  public static void main(String[] args) {
    boolean keepGoing = true;
    while(keepGoing){

      String response = menu();

        if (response.equals("1")){
          System.out.println("Please enter unencrypted phrase");
          String plain = input.nextLine();
          plain = plain.toUpperCase();
          System.out.println(encrypt(plain));

        } else if (response.equals("2")){
          System.out.println("Please enter encrypted phrase");
          String code = input.nextLine();
          code = code.toUpperCase();
          System.out.println(decrypt(code));

        } else if (response.equals("0")){
          System.out.println("Goodbye!");
          keepGoing = false;

        } else {
          System.out.println("Sorry. I didn't understand");
        } // end if
       
      } // end while
   
  } // end main   
 
  public static String menu(){
          System.out.println("Crypto Machine");
          System.out.println("");
          System.out.println("Please enter a selection.");
          System.out.println("0) Quit");
          System.out.println("1) Encrypt a phrase.");
          System.out.println("2) Decrypt a phrase.");
          String result = input.nextLine();
          return result;
         
  } //end menu
 
  public static String decrypt(){
         
         
  } //end decrypt


  public static String encrypt(){

         
  } //end encrypt
 
} // end Crypto
]]> Java Basics scott128 http://p2p.wrox.com/java-basics/76790-crypto-question.html