java-programmer >>DES in java

DES in java

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- 2
 - GUI program locking up...I'm using Netbeans 5.0 beta for an IDE, with swing components. The
 situation is something like this:
 
 The program is a board game - the user chooses a building from a panel,
 and then is supposed to get a message to choose what resource to pay
 for it with. Here's a trace of the code:
 
 Game (main object):
 ....
 board[i].activate():
 Game.game.setPlayer(worker);
 Game.game.playerMessage("Choose a wooden building
 from the building panel.");
 Game.game.waitForBuild(type) :
 built = false;
 state = type + Game.BuildWood -
 1;
 
 mainPanel.buildings.getBP().setSelectedIndex(type-1);
 while(!built)
 { Thread.yield(); }
 No problems yet. This works fine, unless a building that needs to call
 chooseResource is selected.
 So, the user clicks one of these buildings, which activates the
 following code, which is where the freeze occurs:
 
 String r = Game.game.chooseResource():
 state = Game.chooseResource;
 resource = "";
 while(resource.length()==0)
 Thread.yield();
 return resource;
 
 Now chooseResource does work in any other context - resource gets set
 by a mouseClicked event handler in a panel out there. But at this
 point, the GUI stops responding. The playerMessage never gets printed,
 and the click event never gets triggered. I did some investigating,
 printing out numbers inside the two inmost loops, and the
 chooseResource loop is continually running. I know the code's ugly,
 but even so, the cause of this behavior is beyond me. Any suggestions
 would be greatly appreciated!
- 5
 - Problem in connecting to a proxyHi,
 i need to see if a user enters the correct username/password to
 authenticate to a proxy. My problem is... through the following code,
 i am
 able to connect to a proxy with even invalid username/passwords.
 Suppose
 if the valid username and password to a proxy is test/test , i am able
 to connect to the proxy using x/x . the response code returned is
 always 200. Please advice..
 
 ################################
 
 public static boolean isValidProxyAccount(String proxyServer,String
 proxyPort,String proxyLogin,String proxyPassword) throws IOException
 {
 String go_url = new String ("http://www.google.com/");
 boolean VALID_STATUS = true;
 
 try{
 URL url = new URL(go_url);
 
 System.getProperties().put("proxySet",
 "true");
 System.getProperties().put("http.proxyHost", proxyServer);
 System.getProperties().put("http.proxyPort", proxyPort);
 
 HttpURLConnection con = (HttpURLConnection)
 url.openConnection();
 Base64Encoder b1 = new
 Base64Encoder(proxyLogin+":"+proxyPassword);
 con.setAllowUserInteraction(true);
 String enStrProxy = "Basic "+ b1.processString();
 con.setRequestProperty("Proxy-Authorization", enStrProxy);
 
 int code = con.getResponseCode();
 String retMsg = con.getResponseMessage();
 
 System.out.println("code::"+code);
 System.out.println("retMsg::"+retMsg);
 
 System.getProperties().put("proxySet", "false");
 System.getProperties().remove("http.proxyHost");
 System.getProperties().remove("http.proxyPort");
 
 con.disconnect();
 
 if (code != 200){
 VALID_STATUS = false;
 throw new IOException("Failed to connect to CCO: "+retMsg);
 }
 }catch (Exception ex){
 System.out.println(ex.getMessage());
 throw new IOException(ex.getMessage());
 }//catch
 return VALID_STATUS;
 }
- 7
 - Read contents of a web pageI need to read the entire contents of any webpage, and return it as a
 String. The other part of my assignment was to read a file and return its
 contents. I did that with the following code:
 
 private String filename;
 private String contents;
 public TextFileReader(String aFileName){
 
 filename = aFileName;
 
 }
 
 public String readText() throws IOException{
 
 String lineSep = System.getProperty("line.separator");
 BufferedReader input = new BufferedReader(new
 FileReader(filename));
 String nextLine = " ";
 StringBuffer contents = new StringBuffer();
 
 while((nextLine = input.readLine()) != null){
 contents.append(nextLine);
 contents.append(lineSep);
 }
 
 return contents.toString();
 
 }
 
 ----------
 
 So, what do I have to change to be able to read webpages?
- 8
 - how to mail a form in JSPhi this is ravin. i m a last year IT student and i am doing my project
 at a govt. organization. i have to do one thing in my project that:
 > there is a feedback form which is to be filled by any user.
 > it is having four fields.
 1) name
 2) tel.no
 3) e-mail address
 4) comments
 > i simply have to mail this fields to the org.'s mail address when user hits submit button. there is nothing to do with this fields.
 
 please send releated help as early as possible.
- 8
 - Reflection and access to type parameter?Given the SSCCE below, the need to pass A.class and B.class in
 lines 25 and 25 seems redundant. However, I can find nothing in
 the language that would let that be done in the constructor,
 between lines 18 and 19. The obvious would be
 
 Class<T> x = T.class;
 
 but that of course does not work. Is there any bridge at all
 between reflection and generics? I suspect the answer is no
 and the code below is the best that can be done, but I'm
 not sure.
 
 1 import java.lang.reflect.Method;
 2 public class TestEnums
 3 {
 4 public static enum A
 5 {
 6 V1,
 7 V2;
 8 }
 9 public static enum B
 10 {
 11 X1,
 12 X2,
 13 X3;
 14 }
 15 public static class C<T extends Enum<?>>
 16 {
 17 public C(Class<T> x) throws Exception
 18 {
 19 T[] eVal = x.getEnumConstants();
 20 for (Enum<?> v : eVal) System.out.println(v.toString());
 21 }
 22 }
 23 public static void main(String[] args) throws Exception
 24 {
 25 C<A> ca = new C<A>(A.class);
 26 C cb = new C(B.class);
 27 }
 28 }
- 10
 - JacOrb Multihomed serverHi everybody,
 
 we have problems running a corba-server on a multi-homed Win2k-Box.
 The machine has two network-cards. JacOrb is using the wrong IPAddress
 for IOR's.
 I tried the property OAIAddr. Only setting the property to 127.0.0.1
 and running server and client on the same machine was successful.
 Using the real address failed.
 
 Does anyone have an advise for me ?
 
 Thanks in advance
 Ruediger
- 11
 - how to set row height at runtime in a JTableHi
 
 i am trying to set rowheight of row in a JTable using
 setRowHeight(row,rowheight)
 
 it is not affecting on Table.but if i use setRowheight(rowheight) it
 applying
 
 entire table ,please help me to solve this problem
 
 after setRowHeight(row,rowheight), i am calling firechanged() method
 also ,i t will not affecting please hemp me
- 11
 - ?s about Process ClassI have a DOS program I am trying to supply input to using Java.
 Reading from The Java Class Libraries, 2nd Ed. java.lang.Process class -
 the material presented seems to imply that I will be able to do
 this.
 
 The program most definately uses just stdio... (in) being the keyboard and
 (out) being the consol.
 
 Well I can't get it to work and being the presistant bugger that i am I have
 switch tactics so I can more up the learning curve.
 I have resorted to just trying to display the output of mem.exe.
 
 here is the source ::: test.java
 
 import java.io.*;
 import java.lang.*;
 
 public class test
 { public static void main(String[] args)
 {
 int ch;
 int status;
 
 try
 {
 Process process = Runtime.getRuntime().exec("mem.exe");
 InputStream in = process.getInputStream();
 BufferedInputStream buf = new BufferedInputStream(in);
 
 //try
 //{
 //status = process.waitFor();
 //}
 //catch (InterruptedException e) {status = -1;}
 
 try
 {
 while((ch = buf.read()) != -1)
 {
 System.out.print((char)ch);
 }
 
 }
 catch (IOException e) {System.out.println(e);}
 //in.close();
 //buf.close();
 //process.destroy();
 //Runtime.getRuntime().gc();
 //Runtime.getRuntime().exit(-1);
 //System.out.print('\n');
 }
 catch (IOException e) {System.out.println(e);}
 }
 }
 
 It works the first time I run the class file with java test.
 However, the next attempt hangs and requires a system restart inorder to get
 the code to display the results.
 
 The commented code in test.java are my attempts to do various things to
 clean up this issue of not displaying the results.
 
 Does anyone have a clue or suggestion...
 
 thanks,
 publius36
- 12
 - ports/71078: Update port: java/eclipse-pmd upgrade to supportSynopsis: Update port: java/eclipse-pmd upgrade to support eclipse3
 
 State-Changed-From-To: open->feedback
 State-Changed-By: linimon
 State-Changed-When: Thu Sep 2 23:17:52 GMT 2004
 State-Changed-Why:
 Please submit port updates in diff -u format as versus the current
 port. This makes it much easier for ports committers to understand
 what is being changed. Thanks.
 
 http://www.freebsd.org/cgi/query-pr.cgi?pr=71078
 _______________________________________________
 email***@***.com mailing list
 http://lists.freebsd.org/mailman/listinfo/freebsd-java
 To unsubscribe, send any mail to "email***@***.com"
- 12
 - EMPTY_SET.iterator() and generics
 In the old days, before generics, I wrote
 
 private SortedSet onhand;
 
 Iterator getInventoryIterator() {
 return (onhand == null ? Collections.EMPTY_SET ? onhand)
 .iterator();
 }
 
 ... the idea being to create the SortedSet only if there are
 actually some Inventory objects to store in it, and to return
 a suitable Iterator whether or not the SortedSet exists.
 
 Now, in an effort to leave prehistory behind me and adopt
 generics with all their benefits, I change the SortedSet to a
 SortedSet<Inventory> and change the return type of the method
 to Iterator<Inventory> -- but how do I rewrite the guts of the
 method to get the compiler to understand that all is well? The
 problem seems to be that Collections.EMPTY_SET.iterator() returns
 an Iterator<Object>, and the compiler complains when I try to
 return this in place of the desired Iterator<Inventory>. I've
 tried a few variations, but have only succeeded in moving the
 warning message around, not in eliminating it:
 
 return (onhand == null
 ? (Set<Inventory>)Collections.EMPTY_SET : onhand)
 .iterator();
 
 return (Iterator<Inventory>)
 (onhand == null ? Collections.EMPTY_SET ? onhand)
 .iterator();
 
 This seems like a lot of trouble to take over the empty set,
 but there ought to be *some* clean way to do it. Ideas?
 
 --
 Eric Sosman
 email***@***.com
- 12
 - Hiding default console in Windows Hello. Is it possible to hide the default console window in MS-Windows
 in Java? If so, how?
 
 When writing a Swing/JFC application in Java, it would be really nice to
 somehow hide the DOS window that appears.
 
 Thanks in advance.
 
 --
 Randolf Richardson - kingpin+email***@***.com
 The Lumber Cartel, local 42 (Canadian branch)
 http://www.lumbercartel.ca/
- 12
 - Asking help for a java io problemHello, guys! I have a problem running the following code with eclipse
 showing that:
 
 java.io.IOException: Stream closed
 at sun.nio.cs.StreamDecoder.ensureOpen(Unknown Source)
 at sun.nio.cs.StreamDecoder.read(Unknown Source)
 at java.io.InputStreamReader.read(Unknown Source)
 at HtmlFileParser.parseHtmlDoc(HtmlFileParser.java:32)
 at HtmlFileParser.main(HtmlFileParser.java:52)
 
 //code here:
 try{
 FileInputStream fin = new FileInputStream("test.html");
 InputStreamReader fr = new InputStreamReader(fin);
 for(i=0; i<2048; i++) buf[i] = '0';
 fr.read(buf, 0, 2048); //problem here (line 32)
 FileWriter fw = new FileWriter("bufWriteTest.txt");
 fw.write(buf);
 fw.flush();
 }
 catch(FileNotFoundException e) {
 e.printStackTrace();
 }
 catch(IOException e) {
 e.printStackTrace();
 }
 There are no syntax erro in the above code, it just dosen't work,
 please help me finding out what the problem is, thank you.
- 13
 - Riddle me thisOn Mon, 07 Nov 2005 11:35:27 GMT, "Sharp Tool"
 <email***@***.com> wrote, quoted or indirectly quoted someone
 who said :
 
 >All these distribution dont include negative numbers?
 
 A normal is clustered about a mean, nominally 0, with symmetric tails
 left and right.
 
 Poisson is a distribution of positive numbers.
 
 Just what do these numbers measure?
 --
 Canadian Mind Products, Roedy Green.
 http://mindprod.com Java custom programming, consulting and coaching.
- 13
 - JavaHelp and root nodehi,
 Simplifying i have a java help set as this
 
 ROOT -> C
 -> B -> b1
 -> b2
 -> b3
 ->C
 
 I can set B as current visualized node with these instructions:
 helpBroker =(DefaultHelpBroker)coreHelpSet.createHelpBroker();
 helpBroker.setCurrentID(B);
 
 my problem is that i'd like to hide the other nodes setting B as tree
 root node so that i could only see B and its children b1,b2,b3.
 This is because entire help set is recovered from a big manual
 describing a lot of applications and i'd like to show only one referred
 by node B avoiding to show others that couldn't be installed.
 Can you help me?
 thanks
- 15
 - jbuilder 2005 backward compatabilityHi
 I have a project that created by jbuilder X, in the "design" panel,
 everything work great, but when i use jbuilder 2005 to open it, it
 only display gray. Do you know why?
 
 thanks
 from Peter (email***@***.com)

Author

Message

wazary

Posted: 2005-9-14 17:58:00

Top

java-programmer, DES in java Hi,
I need to write a method in Java for
encrypt a String with DES.
the interface is:
public String encrypt(String nameofthestringtoencript);
the return String have to be DES(nameofthestringtoencript)
What is the procedure to follow and the java methods
to do it?
Thanks in advance.

jan V

Posted: 2005-9-14 18:15:00

Top

java-programmer >> DES in java > I need to write a method in Java for
> encrypt a String with DES.
> the interface is:
> public String encrypt(String nameofthestringtoencript);

How odd... you'd expect the name of that parameter to be
"thestringtoencript", not "nameofthestringtoencript". Can you discuss with
your tutor (for extra points ;-)

> the return String have to be DES(nameofthestringtoencript)
> What is the procedure to follow and the java methods

Depends on which JDK you carry out your exercises. The solution could get
low-level if you're on a pre-1.4 platform.

Does the Java Tutorial not have a section on the security API?

Or maybe the Java Almanac...
http://javaalmanac.com/egs/javax.crypto/PassKey.html

Roedy Green

Posted: 2005-9-14 18:24:00

Top

java-programmer >> DES in java On Wed, 14 Sep 2005 09:58:20 GMT, "wazary" <email***@***.com> wrote or
quoted :

>I need to write a method in Java for
>encrypt a String with DES.
>the interface is:
>public String encrypt(String nameofthestringtoencript);
>the return String have to be DES(nameofthestringtoencript)
>What is the procedure to follow and the java methods
>to do it?
>Thanks in advance.

see http://mindprod.com/jgloss/jce.html
http://mindprod.com/jgloss/encryption.html

I suggest getting a textbook. Trying to use the API without a guide is
daunting.
--
Canadian Mind Products, Roedy Green.
http://mindprod.com Again taking new Java programming contracts.

Index ‹ java-programmer

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- 1
 - JMS: the confusion BEFORE writing my first Application.I read in the sun jms doc that jms is the java interface to
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 I'm curious as to which tool you use for this task. The way you said that
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 yet good enough for prime time).
 
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 Is there any simple way to tell Tomcat to precompile _all_ JSPs in my
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 you, but I don't want to maintain their configurations with every jsp
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 What do you guys think is a good way to achieve this goal? How do
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 I have already experimented with Tomcat and some basic jsp stuff, but i am
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 - FWD: Install corrective pack from the MS
 
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 This update applies to:
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 GIF89ah
 GIF89a
- 12
 - Starting using Inversion of ControlHi
 
 I have an existing (Java desktop) application, which I'm looking at
 converting to use Inversion of Control principles. I'm just starting
 to look at the Java containers - HiveMind, Pico, Spring etc.
 
 I'm not sure about how components/services/objects always have to be
 instantiated, rather than retrieved from an existing object.
 
 In my application, I have a IHandler interface, a single instance of
 which is used by a number of objects.
 Currently, the instance is supplied by an Engine class, which has an
 inner class implementing IHandler, and a getHandler() method which
 returns an instance of the inner class.
 
 I'm wondering how, when using Inversion of Control, I can supply this
 instance of IHandler to the objects which require it.
 Most of the containers seem to require that the instance is *created*.
 However, in this case, the instance should be *returned* from an
 existing object (which will also have been created by the container).
 
 What's the best way to deal with this situation?
 I could, for example, make the IHandler inner class to be a public
 class, so it can be instantiated directly. But I'm not convinced that
 exposing the class in this way is the ideal way to do this.
 Thanks for your help,
 Calum
- 13
 - JDK 1.4.2_05I use WebLogic 8.1 on a Solaris 9 box with 8 processors. I have JDK
 1.4.2_05 installed and due to long pauses with the default collector, I
 tried out the Concurrent garbage collector. However, once I do that,
 the system runs out of file handles within minutes of starting the load
 test. Solaris is setup with 8192 as the top limit for file handles.
 
 I tried various options within Concurrent garbage collector (like
 ParNewGC, CMSParallelRemark) but all lead to system running out of file
 handles.
 
 Any inputs ?
 
 Thanks,
 Kevin.
- 14
 - Persist JPA Entity to a file systemIs there a way to persist a EJB3 entity to a flat or xml file to test
 an application if you don't hava a database at hand?
 
 I thought I have read something about it lately but I (google) can't
 find it.
 
 Many Thanx
 Andre Broers
- 15
 - cmr one-to-many unidirectional - jbossHas anybody been able to get a CMR one to many unidirectional
 relationship working with jboss? I'm trying to get it to work but keep
 getting "foreign key constraint not allowed for this type of data
 store".
 
 The relationship is simple, I have two entity beans, person and
 company and I want to have one to many unidirectional relationship
 between these two beans. A person has one company, but a company has
 many persons.
 
 I want to have a company_id field in my person table that refers to
 the id field in my company table. Maybe I'm missing something or doing
 this wrong?
 
 If somebody could post a working example of one to many unidirectional
 I'd be mighty grateful. I'm trying to use the foreign-key-mapping
 rather than relation-table, can you do this with foreign-key-mapping?
 
 Here's what I have:
 
 /**
 * @return the company the person belongs to
 *
 * @ejb.persistent-field
 * @ejb.persistence
 * column-name="COMPANY_ID"
 * sql-type="integer"
 * jdbc-type="integer"
 *
 * @ejb.interface-method
 *
 * @ejb.relation
 * name="Person-Company"
 * role-name="Person-belongs-to-Company"
 * target-ejb="Company"
 * target-role-name="Company-has-many-Persons"
 * target-multiple="yes"
 *
 * @jboss.relation
 * fk-constraint="true"
 * fk-column="COMPANY_ID"
 * related-pk-field="id"
 *
 */
 public abstract CompanyLocal getCompany();