Confusion/Questions about Java

Similar Questions

• Can I post here questions about Java Script here in this category?

  Hello

  I can post my questions of JAVA SCRIPT here in this category-Acrobat Scripting? If this isn't the case, RAS is the right forum category?

  Thank you

  The PDF files created by a program can be used by Acrobat, Reader and other 3rd party programs that can process PDF Forms.

  The only exception, if the folder level user written JavaScript work that uses Acrobat JavaScript.

  JavaScript for Acrobat

  Documentation of Adobe LiveCycle ARE

  LiveCycle® Designer ES scripting Basics

  LiveCycle® Designer ES script reference

  FormCalc user reference

  The shotgun approach to post the same question in all possible forums is not appreciated.

  Here are the free user 2 forums and responses are coming from other users and they might appreciate the little help to answer questions that form you.

• Java card confusing questions! Java Card architecture, advantage!

  ISSUE - 1

  As I know about architecture of any application is -
                  //normal java software                          java card                                  java card
                    //  1                                               2                                      3
  1-            application program                        host application                           host application
  2-                     JVM                                   Applets                                       Applets 
  3-              operating system                JCRE(which contain all classes, JVM ....)                 JCRE(act as a O.S too)
  4                    hardware                              Operating system                                 H/W
  5                                                                        hardware

  What you think about case 2 is right? or 3!
  I think that - case 3 is right!
  I studied from several sources, the JCRE is the complete package - it behaves like an operating system and use the functionality of the component it contains. I also think that if I buy a java from any vendor card, he would have JCRE inside (means everthing inside), I only need to develop the applet according to my requirement and install it by card setup
  
  
  QUESTION 2 - What is the advantage of java card. ?
  

  // I think.
  as i read out , i got the line that it is platform independent and support multiple application. applicaton point of
   view , I am agree but how it is platfrom independent. if we use java card for smart card development, then 
   i will purchase Java card from differnt vendor , all will provide me card with supported jcre inside it, so why
   this is advantage here?
  // in case of window based application , it really make sense  because if i will make any window application with java
  // i can run it in windows , linux , unix and most of os flavours, here i can see the beauty of java language.
   Clear me this and add some other java card advantages, which make java card good

  question 3-
  

  Now I am capaple to make simple applets, so I want to check the entire java card process atleast once before 
  going in deep of something, I am thinking to implement prepaid card concept , i made it applet for it ,it will 
  contain a page with 2 text box ( 1- for recharge 2- for money deduction ) and two button , with button click i 
  want to select the applet and want to pass the apdu.
   ( a) how i can make host window application ? (i think awt will work for me? , *
  i never make any java window application yet) * 
   ( b) still i dont have any java card , i want to make it by using simulator, is it possible?
    (c) in this scenario what framework i need to study Ex. Import javacard.framework.* for making
   applet or from where i need to start.

  With regard to:
  Rohit pathak
  
  Published by: rohit pathak on 9 February 2012 22:10

  Hello

  so why should I use applet concept here OR WE can't USE APPLET CONCEPT THERE! We will go to c code to implement...

  Yes, you can also write cmdlets in C. But in this case you also need mechanism by you that you will be able to convert your code in the .cap file and install it on the map.

  so I think that a card that does contain no JCRE, should not be called a java card. RIGHT?

  Yes, he called card native.

  or if a card is a java card must contain jcre and I need to write only applet here. RIGHT?

  Any card that can be programmed in a java programming language is called a java card. And to execute/interpret java byte code on the card, you will need something like JCRE/JVM on it.

  s This also possible case that a map is a java card, which contains no JCRE (jcre also contain JVM) java applet concept but is there? I think that it is impossible

  Already answered above.

  a card that contains your own OS (written in c) does not support the concept of the applet, here you must omit concept applet and should just your own program to manage the apdu. right?

  Either way, applet is also a program and when card java, it supports only a subset of the standard programming lauguage.
  Yes, you can name what you want :)

  Java card cocept is costly because here you use other OS and OS MEANS EVERYTHING, RIGHT so U NEED HIGH pay to OTHERS a (OWNER JAVA)?

  Are the manufacturer must also bear the cost of the license also. But in my view, it is inexpensive because of its more services and features.

  Concerning
  Umer

• Question about Java and other concerns

  It was in the original thread Java, decided that it should be easier in the separate thread.

  A simple uninstall will get rid of Java, or leftovers to stick around. After picking up the Live safety scanner fake Trojan or whatever it is, I did some scans online in addition to MMFA, who got rid of him in a quick scan and SAS, and Windows Defender. You don't know if AntiVir would be cleaned, but MBAM it in the short term. Thought I was clicking on a secure link, but I learned enough here to start in Safe Mode, run MBAM, and WD of Tower and Windows Security Center and return to normal. Somewhere along the line, I received a few Java mentioned error messages. Think that I tried to download ot and run an online scan, but can't remember for sure.

  Moreover, somewhere I took advice of Prime Minister, which seems to be a malicious ad-ware and pest stealing information data. I deleted the program. It does not appear on all analysis, but there is an entry in WinPatrol in Services, where it shows up as being disabled. He also appears in the Services in Task Manager, where it shows stopped. Don't know what I can do to get rid of it completely or if it anything wrong at this point, if it is disabled.

  Dale,

  even if java uninstaller leaves behind some errant registry entries, I don't know that it's worth trying to go after them.   [For example, I found a Web page since java itself which talks about how to change the registry in case"Java icon is still visible in the Panel hasthat almost have Java is uninstalled".   [I have purposely not cited this link here, because I don't recommend editing the registry and don't want to be responsible for all the problems if they try to do.]

  ---------------------------------------------------------------------------------------------------------

  "I've learned enough here to start in Safe Mode, run MBAM, and...". »

  Note that MBAM is designed to run in NORMAL mode, in order to be able to find and conquer the malware that is resident / operation of the system RAM.   (By starting in safe mode, this malicious program does not work often and if MBAM won't find it in memory).   In fact, the only time where we should try to launch WHAT MBAM in safe mode is when he is unable to run in normal mode.   And now, with MBAM Chameleon, it is even less likely that MBAM will be prevented from running normally.

  In this sense, MBAM takes a very different from other security programs philosophy, that often MAKE application users run in safe mode.

  And as you have seen, MBAM focuses on 'rogue' malware that other products do not detect or do not remove properly.   For a person to "do-it-yourself", it should be the first scanner that you run when it encounters a thief.   [Of course, to "do it yourself", you can only exacerbate existing problems... so you must proceed with caution.]

  -----------------------------------------------------------------------------------------------------------

  Somewhere along the line, I received a few Java mentioned error messages.

  Was it a message 'error', that Java was "defective"?   Or was it just a notice that you visited a java requiring site, which he could not find (active) on your system?

  -------------------------------------------------------------------------------------------------------------

  Regarding the Premier's Opinion, I would be concerned that "it also appears in the Services in Manager tasks, where it shows stopped.   [I am less concerned with what appears as 'disabled' in respect of the services of WinPatrol, as sometimes, after deleting a program or a service, it may still appear as a service disabled in WinPatrol.   But in this case, WinPatrol should indicate that the (local) file is not found.]

  But as I am not familiar with this particular program, you can either wait Bugbatter you answer here, to see what she suggests... or if you're in a hurry, you can follow the instructions at http://www.spywareinfoforum.com/index.php?showtopic=79038 to sign up and post the logs requested to SpywareInfoForum.com; There are experts here AIDS that can 'walk you through' procedures to analyze your system and clean the infection.   Any help provided that it is FREE.   If you decide to go to help them, please wait for a response, and do NOT attempt to perform any other scans to remove yourself – do exactly as they ask you to do, no more, no less.  

   

• I just asked a question about Java. I received a response. I can't answer, so it's impossible to add anything to this area. How to add to the box?

  I can't add all the sites, either by cut-and - paste or type the thing everywhere. Nothing allows me to add!

  So, what to do on add?

  Thank you.

  It would be useful if this support forum my license to integrate a picture, but I can't even connect to my new account, as it says my password is wrong, which is not very frustrating on all accounts!

  FWIW, the original question is https://support.mozilla.org/en-US/questions/1036576 and I had step by step response in there.

• A general question about java.lang.Throwable

  Hello everyone,
  
  Recently, I was involved in internationalization and localization on the Java platform for the first time.
  
  As part of this I wonder why java.lang.Throwable does not provide a way to specify a localized message. We have getter right getLocalizedMessage() available but no consideration Set accessor. Even for a good cause, there is an initCause method.
  
  This is in order to make getLocalizedMessage() return a sensible message that guests under class Throwable and implement corresponding logic.
  
  None of the builtin Java, such as IllegalArgumentException, exceptions not supported for a message located out of the box. So, as I see it: if I want to have a localized version of one of these I have to void / class.
  
  Does anyone have a rationale for that, respectively, which was the intention of Java developers.

  togtog wrote:
  None of the builtin Java, such as IllegalArgumentException, exceptions not supported for a message located out of the box. So, as I see it: if I want to have a localized version of one of these I have to void / class.

  It would be pointless to have a localized version of the standard exceptions in the first place. Those who are for the developer, not the users.

• Questions about discussions...

  Hello

  I have a new app to do that requires network access.

  I have read this EXCELLENT post from peter_strange:

  http://supportforums.BlackBerry.com/T5/Java-development/connecting-your-BlackBerry-http-and-socket-c...

  Because I can't use BIS - B because I'm not a partner of the Alliance, I wanted to take a look at the new OS 5.0 network API and see how it works.

  I know that network connections should be performed in a separate thread.

  I'm far from being an experienced Blackberry developer... so I have a few questions about discussions.  I looked around the Internet, read on the forum, read the documentation, did some tests and so far, I came up with this code:

  SerializableAttribute public class HTTPConnection extends UiApplication {}
  Public Shared Sub main (String [] args) {}
  HTTPConnection PAP = new HTTPConnection();
  theApp.enterEventDispatcher ();
  }

  public HTTPConnection() {}
  pushScreen (new HTTPConnectionScreen());
  }
  }

  class HTTPConnectionScreen extends form {}
  public HTTPConnectionScreen() {}
  setTitle ("HTTPConnection");
  Add (new RichTextField ("choose a type of connection :"));

  final RadioButtonGroup = new RadioButtonGroup() rbGroup;
  RadioButtonField radioButtonF1 = new RadioButtonField ("Direct TCP", rbGroup, false);
  RadioButtonField radioButtonF2 = new RadioButtonField ("WAP 1.0/1.1", rbGroup, false);
  RadioButtonField radioButtonF3 = new RadioButtonField ("WAP 2.0", rbGroup, false);
  RadioButtonField radioButtonF4 is new RadioButtonField ("BES/MDS", rbGroup, false);.
  RadioButtonField radioButtonF5 = new RadioButtonField ("BIS-B", rbGroup, false);
  RadioButtonField radioButtonF6 = new RadioButtonField ("WiFi", rbGroup, false);
  Add (radioButtonF1); Add (radioButtonF2); Add (radioButtonF3); Add (radioButtonF4); Add (radioButtonF5); Add (radioButtonF6);
           
  FieldChangeListener listener = new FieldChangeListener() {}
  ' Public Sub fieldChanged (field field, int context) {}
  ConnectionThread ct = new ConnectionThread (rbGroup.getSelectedIndex () + 1);
  CT. Start();
  }
  };
           
  ButtonField buttonField = new ButtonField ("Connect", ButtonField.CONSUME_CLICK);
  buttonField.setChangeListener (listener);
  Add (buttonField);
  }

  / * method of onSavePrompt override default to avoid being asked if I want to record every time * /.
  protected boolean onSavePrompt() {}
  Returns true;
  }
  }

  class ConnectionThread extends Thread {}
  private int transportType;
  public ConnectionThread (int n) {}
  transportType = tt;
  }
      
  public void run() {}
  ConnectionFactory connFact = new ConnectionFactory();
  ConnectionDescriptor connDesc = connFact.getConnection ("URL", transportType, null);
  If (connDesc! = null) {}
  try {}
  HttpConnection httpConn = (HttpConnection) connDesc.getConnection ();
  httpConn.setRequestMethod (HttpConnection.POST);
  httpConn.setRequestProperty ("Content-Type", "application/x-www-formulaires-urlencoded");
  OutputStream out = httpConn.openOutputStream ();
  out. Write (Integer.ToString (transportType). GetBytes());
  int responseCode = httpConn.getResponseCode ();
  If (responseCode == HttpConnection.HTTP_OK) {}
  UiApplication.getUiApplication () .invokeLater (new Runnable() {}
  public void run() {}
  Dialog.Alert ("- SUCCESSFUL CONNECTION-");
  }
  });
  }
  If (httpConn! = null) httpConn.close ();
  } catch (IOException e) {}
  System.Err.println ("IOException Caught:" + e.getMessage ());
  }
  }
  }
  }

  In fact, this code works very well... but I want to improve it, and I have a few questions:

  1. I think that right now, every time I click on the 'Connect' button, I start a new thread. I would like to end this thread in the "run" method, but I don't really know how to access the variable 'ct' from there.   Counsel on how to do it?  Or maybe always use the same thread until my application is closed?

  2. in the FieldChangeListener of my "Submit" button, I want to access the value of radio box.  I did work, but I had to do my 'final' variable  What is the right way to do it?

  3 - to display a dialog box with 'Successful connection', I just wanted to write something in my main screen.  How I do that?

  I'm just a bit confused as to just what set up when you use a separate thread.

  Thanks for your advice!

  Edit: Hidden URL I connect to...

  That's what I call a good question! (now I'm wondering why the forums do not work with opera correctly, in any case, here my baldy to the answer format): 1. your thread "dies" when it's over, no need to close it. 2 Yes 3. You can use a reminder. See for example http://www.javaworld.com/javaworld/javatips/jw-javatip10.html

• Question about the recovery partition

  Hello.

  I have a question about the recovery of HARD drive partition.

  If I do the operation to clear the hard disk option in the wizard it will remove * all * or it will keep my partition recovery in this way I can come back later. I want to know because I would like to put on a different OS.

  I know he said he would, but caution in the PDF, I found it says that on a normal recovery too (that he would remove each partition) and I'm a little confused about how the recovery actually worked.

  Thank you.

  Hey Buddy,

  To be honest I n don't know what you mean exactly with this option to erase.

  In General, Toshiba Recovery disk will wipe your entire HDD to restore factory settings correctly. This means that if you start from that disk and follow the instructions on the screen, everything will be removed.

  In addition, the recovery disk doesn t create a recovery partition. It is not available. Disk copy just the files on the second partition in folder HDDrecovery to start an installation of HARD drive recovery.

• Re: Several questions about the recovery of the Satellite L750 features

  I have several questions about the recovery of Satellite L750 features available to it. Any help and answers would be useful.

  (1) when I started the laptop first, he asked me to create a recovery CD incase I need to reinstall the operating system. But he also said that he built in the recovery partition, so therefore, I have to make a recovery cd or not?

  (2) will be the recovery CD is exactly the same as the recovery on the system partition?

  (3) is the partion of CD or recovery includes all the integrated software pre-installed with the laptop?

  (4) also in the device manage management it shows watch partion recovery but it is empty, is it true?

  (5) in the second partition (drive D) system, he has a record with what looks like the recovery of files and folders. Is it safe to move/remove it?

  Hello

  I'll try to provide answers:
  1 - to ensure that everything works perfectly you don t need these discs, but if something goes wrong with the HARD drive you will not be able to do anything. When you have the recovery DVDs, you will still be able to install the recovery image and once again the factory settings. So my advice to you is: create these discs as soon as possible. Use only on DVD-R media and buy products of high quality (TDK or Verbatim).
  2 - Yes.
  3 - Yes.
  4 - No. Don t be confused with this.
  5. in a first time create restore DVD, and later you can do what you want. I put t know which files mean you but don t touch anything before that of the recovery disks to be created.

  In the past, many people have been experimenting with the structure of HARD drive and partitions and later was surprised when installing disk recovery HARD has been damaged. Don t make the same mistake.

  If you have any other questions you are welcome.

• Questions about Satellite P10 554

  Hello

  I have 2 questions about my P10-554. I read on this forum but can't find anything that helps out me.

  First of all:
  When I try to turn the unit off after working, using even the closing of xp function or the power button, windows normally quit, but when it needs to turn off just reboot again. If I repeat the closing down directly after this restart, normally it turns off.
  This problem occur only when I use the power supply in battery mode.
  I can't say that to me...

  Second:
  I have a mini PCI Wlan card for my unit, works very well, but I wonder if it is possible to get the Wlan switch switch work whith it? Or is it only possible whith some special maps? It is not so important, but it would be nice to know if there is a trick or something to get the switch used.

  Best regards
  Gabbagandalf

  Hello

  Regarding your first question;
  I'm a bit confused of m are sure you n t use the restart option?
  I never noticed anything like that on my laptop

  Usually, if I use the Shut down option, I can choose between standby, hibernation, restart and shutdown. If I use the stop that the laptop turns off as it should.
  Maybe it's time to s for a reinstallation of the OS?

  On the second question.
  The switch on the left side for laptop was designed and developed to pass on the WLan card antenna.
  Usually, you should be able to use this switch and to toggle WLan card functionality

  Don t understand why it should not work?  :|

• Question about Dell OEM: SLP Windows 7 Installation disk domestic; can it be installed and activated on other computers from Dell?

  I bought a Dell installation disk and I want to use it to install a better version of Windows on my Dell PC. I have windows Vista and I want to use it to update my OS Windows7 Home Premium. However, the license type is SLP:OEM and no detail... not sure what SLP: OEM means... I thought that the OS discs are the same. Someone told me no retail editions are not suitable for a new OS, but I'm confused. The disc says, Windows 7 Home premium 64-bit, but didn't holograms who have all MS OS disks and the disk is labeled for use with a Dell system only, if the means it will work very well on my Dell PC? The label does not which brand or model this disc is for, but said only for the Dell PC which is my PC. I'm assuming, the disk won't work on all Dells, maybe someone can offer suggestions, any help is much appreciated. Thank you!

  I have a few other questions about Windows 7, can I ask you about this on your Web site? Do not know how to contact you on your website. I can see other people responding to your articles, but that's all. I thought that maybe their might be a forum to post a question... Thank you for everything.

  You can comment on my site but comments will be public and it is easier to answer questions in the forums.

  If you want to be more precise, you can post in the Dell Community Forums. :

  http://en.community.Dell.com/support-forums/software-OS/

  There are also ways to private message me there is something I don't think that can be done by non-moderateurs on Microsoft Answers. However, I prefer answering questions on the forum:

  http://en.community.Dell.com/members/natakuc4

  Concerning the compatibility with Windows 7, I have listed a full pilot system here compliment:

  http://dellwindowsreinstallationguide.com/driver-sets/Inspiron-desktops/Inspiron-518-Windows-7-64-bit/

  Theres nothing to worry about your circuit board, the only driver who can break your system's BIOS update. I only list the last official update BIOS list Dell in my unofficial driver sets.

  The webcam should be covered by Dell Webcam Central but what is the monitor?

  http://ftp.Dell.com/Monitors/Dell_SX2210-Monitor_Webcam%20SW%20RC1.1_%20R230103.exe

  The main difficulty is to get a genuine product key Windows 7 64 bit. The time now it's easier to buy the 64-bit Windows 8.1. No matter if you buy Windows 7 or 8.1 64-bit both going to Windows 10 free when the RTM is out.

• General question about the Browser element

  Will look for an alternative, I found the Browser element and now I have a few questions about that:

  As I am not yet experienced on the Interfaces of Java development, I was wondering if following senario is possible:

  Have some HTML Pages which do the job of the Interface.

  If you submit a form, the JAva Base program (the Master application) process all Information.

  If you are viewing a list, the info is from a json of the Base program output.

  As the Communication Server Client HTML, the only difference is, that all communications remains inside the app.

  Is this possible?

  I can't speak to the idea of dealing with the entry of html, but I can confirm that it is possible for an application program to create a html page and providing the BrowserField for display.

• Question about RAM

  Hi, I have question about ram because I'm so confused how this works.

  on my computer it says quad core and 6 GB of ram doesn't mean it all to combine them is 6 GB of ram? or each one is 6 GB?

  on my system config it says 6 GB so it means that each of them is 6 GB?

  and could you explain how to work this thing of hearts?

  Hello

  If your laptop is 6 GB of ram, it will mean that it is a 4 GB module in a slot and a 2 GB module in the other.  You can always refer to download and install the application at the link below.

  http://www.CPUID.com/softwares/CPU-z.html

  One time installed, launch the application, click the SPD tab and you will see the size of the memory card in the location selected in the drop-down list.

  More info on multi-core processors can be seen here.  Details in this regard are visible in the CPU tab on the above application.

  Kind regards

  DP - K

• Small questions about Dataguard

  Hello

  I have a few questions about Dataguard. I'm new to DG, carry me so for the display of these fundamental questions:

  We plan to install Oracle 12 c to Win 2012 R2 with primary and physical intelligence on different physical servers. We are looking for HA solution, but cannot afford to license CARS. The two primary & Eve are going to be in the same data center connected via a 1 gigabit network. So I have a few questions related to it.

  (a) since both of our primary & Eve is going to be in the same data center with good connectivity. Can I assume that although Data guard is more DR solution, in our case it would be HA solution since we have no network latency.

  (b) is it safe to assume that where primary fails, then the day before can automatically take the role of primary education without any manual intervention, possibly using Dataguard broker?

  (c) so I understand that where primary breaks down, the existing connections transfer automatically from primary to standby db (most recent primary), but how my web based java application will know that more recent connections must be sent to the standby db Server (more recent primary)? I guess net Oracle has a provision to handle this? Who can be automated?

  (d) given that I have only 2 physical servers, can I deploy broker Dataguard on a normal PC (since it is a thin client) assuming the PC is kept in the data center and is online 24/7?

  (e) I was reading about the modes of Protection, account required to our current situation & infrastructure, I choose 'Maximum availability Mode' instead of 'maximum Performance '.

  (f) what is your point of view about Oracle integrated security? I hear too much on Oracle failsafe, because people generally go to a combination of CARS & dataguard for HA? We have a few additional storage that can be shared between the two servers, but I feel with literally no DG network latency can provide us HA.

  Concerning

  Learner

  (a) since both of our main & secondary is going to be in the same data center with good connectivity. Can I assume that although Data guard is more DR solution, in our case it would be HA solution since we have no network latency.

  Well it will not provide the level of HA that is RAC. RAC is a Transparent Application failover. With a physical standby, you need to apply some delay for a failover operation. You can implement the observer that can automate the failover and reduce the time.

  (b) is it safe to assume that where primary fails, then the day before can automatically take the role of primary education without any manual intervention, possibly using Dataguard broker?

  This isn't really the DG broker, but rather the observer you will need to implement. The DG broker automate failover. It will be the observer who "sees" (where its name) that the principal is down and initiate the failover process. To do this, the observer will use the DG broker, so it will be necessary.

  (c) so I understand that where primary breaks down, the existing connections transfer automatically from primary to standby db (most recent primary), but how my web based java application will know that more recent connections must be sent to the standby db Server (more recent primary)? I guess net Oracle has a provision to handle this? Who can be automated?

  You'll want to read on the QuickStart failover. http://www.Oracle.com/technetwork/articles/smiley-fsfo-084973.html

  (d) given that I have only 2 physical servers, can I deploy broker Dataguard on a normal PC (since it is a thin client) assuming the PC is kept in the data center and is online 24/7?

  The DG broker is required to run on the database server. The DG broker will run on the primary and standby. I think that what you're asking really anything is if the observer can run on a PC. Yes it can. However, it is probably not a good idea. A PC will not have the internal hardware redundancy, a server can have. If the PC can fail more often than to a server. And if the gods are bad, it will fail when you most need.

  (e) I was reading about the modes of Protection, account required to our current scenario & infrastructure, I choose 'Maximum availability Mode' instead of 'maximum Performance '.

  Your choice should depend on the amount of data loss is acceptable.

  (f) what is your point of view about Oracle integrated security? I hear too much on Oracle failsafe, because people generally go to a combination of CARS & dataguard for HA? We have a few additional storage that can be shared between the two servers, but I feel with literally no DG network latency can provide us HA.

  Oracle integrated security only works on Windows with a MS Failover Cluster. Real DBAs do not have Oracle on MSFC.

  See you soon,.
  Brian

• A question about the methods and parameters.

  Hey guys, this is my first post here. I am very new to Java and done a bit of C++ before Java. I had a question about the methods and parameters. I do not understand the methods; I know they can be repeated when it is called, but it's almost everything. I also know that a program should have a class that contains the main method. What I really, really understand on methods is what the parameters are. I know they are in parentheses and that is it. Could you explain what they are? I really appreciate it. Thanks to all in advance. Best regards, Michael

  Taking an example:
  Suppose you calculate area of the rectangle you need two inputs one is the length and the width. Area = l X b, where l = length, b = width

  If your method, say, calculateAreaOfRectangle (length int, int width) will be two parameters as arguments.

  System.out.println ("field of rectangle:" + calculateAreaOfRectangle (40,30);)

  public int calculateAreaOfRectangle (int length, int width) {}
  int area;
  Area = length * width;
  return of area;
  }

  So if you call this method then the output will be returned in 120.

  Parameters of a method are simply the input variables for the method of treatment for all calculations or something useful.

  And we cannot have methods inside the main method in Java. It is in the java syntax and if you do, it will throw a syntax error.