How to read the java class file to convert it in java.

hello all,
i m developing the java application which generated the java code from the java 'class file' .
Can anybody please help me, Is any java support for reading the class file? or how to know the class file format?
I know the application javad, jad, javap which is doing the same thing.
thanks for reply,
- Jayd

do you mean decompiling? there are tons of java decompilers available out there, what exactly are you trying to do here?

Similar Messages

How to read the whole text file lines using FTP adapter

Hi all,
How to read the whole text file lines when error occured middle of the text file reading.
after it is not reading the remaining lines . how to read the whole text file using FTP adapter
pls can you help me

Yes there is you need to use the uniqueMessageSeparator property. Have a look at the following link for its implementation.
http://download-west.oracle.com/docs/cd/B31017_01/integrate.1013/b28994/adptr_file.htm#CIACDAAC
cheers
James

How to read the content in one node of XML in Java? Pls help

My dear brothers,
I am a newbie of XML, I have a exercise which is creating a Tree View from XML file. But the trouble is I do not know how to read the content in one node of XML file. I decide to use the algorithm as following:
1. Create a GUI form which gives the ability for user to choose a XML file (ok)
2. Load XML and return the file (ok)
3. Read the file from node to node to create the node in Tree View (?!)
Please help me, and if you are enough kind, please give me an small example to easy understand. Thanks in advance.
Hoang Yen Binh

I hope this one helps you.
     <ABC Type="ProductBased" ProdName="One" Location="India">
          <CEO>Raj</CEO>
          <Finance>Vikram</Finance>
          <HR>Karthik</HR>
          <Technical>Satish</Technical>
     </ABC>
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Attr;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.DOMException;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;
public class XmlReading {
     Document doc;
     Element element;
     public static void main(String[] args) throws Exception{
          XmlReading xr = new XmlReading();
          xr.getXmlParser(args);
     public void getXmlParser(String[] args) {
          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
               if(args.length != 1) {
                    System.err.println("Argument Required");
          try {
               DocumentBuilder builder = factory.newDocumentBuilder();
               doc = builder.parse(new File(args[0]));
          }catch(ParserConfigurationException e1) {
          }catch(SAXException e2) {
          }catch(IOException e3) {
          getAttributes();
     public void getAttributes() {
          // Retrive the entire Document from the Dom Tree
          element = doc.getDocumentElement();
//          System.out.println(element);
          NamedNodeMap attrs = element.getAttributes();
          // Get number of attributes in the element
     int numAttrs = attrs.getLength();
     // Process each attribute
          for (int i=0; i<numAttrs; i++) {
               Node node = attrs.item(i);
               // Get attribute name and value
               String attrName = node.getNodeName();
               String attrValue = node.getNodeValue();
               System.out.println(attrName + ": " + attrValue);
          String s1 = element.getTagName();
          System.out.println(s1);
          // To get all the elements in a DOM Tree
          NodeList nl1 = element.getElementsByTagName("*");
          int i2 = nl1.getLength();
          System.out.println(i2);
          for(int i=0; i<i2; i++) {
               System.out.println(nl1.item(i) + "\n");
}

How to Read data from excel file without converting a excel file into .csv or any other format

Hello,
Can somebody suggest me how to read from an excel file (consisting of 10 work sheets) to an array?
Thanks,
She

You have to be careful when using the spreadsheet-files vi's. They are located in the Functions Palette under File IO, you will find "Write To / Read From Spreadsheet File.vi"s.
Here is what the Context Help says about the vi function:
"Reads a specified number of lines or rows from a numeric text file beginning at a specified character offset and converts the data to a 2D, single-precision array of numbers. You optionally can transpose the array. The VI opens the file before reading from it and closes it afterwards. You can use this VI to read a spreadsheet file saved in text format. This VI calls the Spreadsheet String to Array function to convert the data. "
This is quick & easy when the spreadsheet is all the same format. You can set the format to string as well. HOWEVER... you do have to convert the Excel spreadsheet to text before using it.
I haven't experimented with the Active-X, but it may look as the way to go if you have combination text / numeric values in the spreadsheet.
If you did convert it to text, then you can use array functions as well and treating the file as an array of strings (see very brief example attached). The example is to illustrate a point only
JLV
Attachments:
starting point for spreadsheet.vi ‏28 KB

How to read the entire CSV file content

Hi All,
I am using JDBC adapter and i need to send the entire CSV file to the Blob datatype filed.
How to achive this?
Thanks
Mahi.

Hi Mahi
So you want to send the content of the entire CSV file to a particular field in data base?
You can write a java mapping to read the content of the CSV file and then populate the same under the field of the data base.
If you need help on java mapping then please provide the sample CSV file and the target JDBC structure.

How to read a comma separated file in web dynpro for java?

Hi,
I am new to web dynpro for java, i am trying to develop an application where i am uploading file which is a comma separated file i need to read the content of it and then call an rfc pass those values to it. i have created the ui for the afforesaid.
How do i read the content and call the RFC please help
Thanks

Hi Anumeha,
Perhaps your question can be answered in the Web Dynpro Java .
Thank you.
Regards,
Jan

How to use the RSA key files generated by Crypto++ in java

Hi - Good day to all :)
I have two RSA key files(private key file and public key file) generated by Crypto++ 5.2.1:
code here:
void GenerateRSAKey(unsigned int keyLength, const char *privFilename, const char *pubFilename, const char *seed)
     RandomPool randPool;
     randPool.Put((byte *)seed, strlen(seed));
     RSAES_OAEP_SHA_Decryptor priv(randPool, keyLength);
     HexEncoder privFile(new FileSink(privFilename));
     priv.DEREncode(privFile);
     privFile.MessageEnd();
     RSAES_OAEP_SHA_Encryptor pub(priv);
     HexEncoder pubFile(new FileSink(pubFilename));
     pub.DEREncode(pubFile);
     pubFile.MessageEnd();
}generated private key is:
30820273020100300D06092A864886F70D01010105000482025D3082025902010002818100E19891D888651221AF315B369873F01910D097F554723EE8748FA230F2B954EBEFC57CB402DD03333BA9514AB5256EF92BE714C710D166A1D86CB7A11EFB4499506826AB873F5036B92F07BBB3ABB8F562646DE6E11031C46542633605FDE4A31E0E0A8651B4BC7743C18266D664E59E713D7595ED3D3B6C2F94C6072E276171020111028180425A0CC7372CC918F74AC07978221970C8B5D25736F46CDAF51B2FB40B27735473B28E16D3AA6A5A5CD7724326382FB2B28F4258AA97F1026CD4AE7AAEC25F77D54DF69BB3979E2893EBB071DA5752871BC8C60F9B5546C466F3103884D6B67FADCD51B17899991989507CB16F45DD76EC0DEDA1BD979ED1A101179F9687E9E5024100FFCAAEF814F12DCBDF20D4CFDD5007738DAAE45AE7EC2FD8E23A9EFCA85FADCAF61B03BFEA6FE6023E78700F804C4C275375A85BC367FE39D5FB2E0F0A4555F7024100E1C797A20FB108ADAFECDB025665FF500FDBB4F0829BAAE95833C046005DCA593F6C2437CD3A9AB7CC04372F422B0EE2C7FED87AA53821366962AE0CBDAD89D702402D23C48621D035421851167F08F00150A08791B5B074F96282469486F0895AE794D7973FFC31DD4BB0ABD78A43D13A9D8732E1799AF43BEC16B3DAF3986696B30240351FE7716D1A98A156921569F6361DF4B86FEE56B551CDDC8D395A6AD2E8E4513C1971EF031CD91C3000FDED00829A173E1DD895540D34FDBE71925D59CE7AC9024014A4347A1E7408FBB0A9AE5064FA58CAF2BCA5C00B8082A46EECABFA5CBF61364FEE81E2C049F399A2F601C802DD54A6D9340FABE62D6D1F913026C8B3764AFEI use this key in java
BufferedInputStream input=new BufferedInputStream(new FileInputStream("privateKey"));
          int size= input.available();
          byte[]buffer=new byte[size];
          input.read(buffer);
X509EncodedKeySpec lX509EncodedKeySpec = new X509EncodedKeySpec(buffer);
          PrivateKey lPrivateKey = KeyFactory.getInstance("RSA").generatePrivate(lX509EncodedKeySpec);there is a exception,at generatePrivate() method
at sun.security.rsa.RSAKeyFactory.generatePrivate(RSAKeyFactory.java:294)
     at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:171)
     at java.security.KeyFactory.generatePrivate(KeyFactory.java:322)
     at test.Main.main(Main.java:27)any body can help me?

X509 is for public keys, not private keys. You need PKCS8 using PKCS8EncodedKeySpec on the hex decoded private key string.
Your method for reading the private key from the file is flawed. The method available() does not guarantee to give you the file length. This is easy to prove since files can be longer than Integer.MAX_VALUE and available() returns an 'int'. To get the file length use File.length() which returns a 'long'. Also, reading from an InputStream using
input.read(buffer); does not guarantee to read all the bytes. For that you need to use something like DataInputStream.readFully().

How to read the TEXT TABLES (Or) .CSV in HSQLDB using JAVA

Hi,
I want to use the HSQLDB instead of mdb in our application. I am using the HSQLDB Engine Standalone mode, and given a file name "TEMP" in URL along with the "jdbc:hsqldb:file:". Then a I created a TEXT TABLE, that table was created as a .CSV file in the Disk. But I am unable to read that CSV, I tried that file in the database URL. But its not working. Can anubody give me the suggestions.
Thankyou,
Regards,
Vinay.

Hi Rajeshreddy.k,
To add multiple users to one group, I wouldn't use a .csv file since the only value you need from a list is the users to be added.
To start create a list of users that should be added to the group, import this list in a variable called $users, the group distinguishedName in a variable called $Group and simply call the ActiveDirectory cmdlet Add-GroupMember.
$Users = Get-Content -Path 'C:\ListOfUsernames.txt'
$Group = 'CN=MyGroup,OU=MyOrg,DC=domain,DC=lcl'
Add-ADGroupMember -Identity $Group -Members $Users

How to read the extension .RNO files.

Guys..
We are implementing B2B scenario ,
We are getting .RNO file with Rossettanet, Preamble, ServiceContent, OrderCreate, and DigitalSignature tags in it. Once XI got .RNO file, XI needs to map with ORDERS05 and send to R/3.
Can any one explain me
how to validate the DigitalSignature,
how to convert .RNO file to XML? or Is there any XSD document which includes Rossettanet, Preamble, ServiceContent, OrderCreate, and DigitalSignature.
Thanks
M

Hi Murali,
1) Are you using the SAP business package for B2B over Rosettanet -- This contains the Mappings to backend ERP system but comes at an extra license cost .
From your description, I assume that you are the seller ?
2) The conversion of a RosettaNEt PIP message into XML is done ( keeping only the service content payload to be mapped afterwards ) by the XI RNIF adapter. What version of RNIF are you using RNIF1.1 or RNIF2.0
Also signature validation should be done by the adapter by setting the right flags in the adapter.
Many variants are possible but i depends on what you agreed with your partner
3) The security settings are done in the sender/receiver agreements and in the communication channels
rgds
Dirk

How to read the latest created file ?

Comment je peux avoir le nom du fichier le plus récent (ayant la date de modification la plus récente) ?
How can i get the name of the latest created or modified text file ?
Thx for help.

(BiJay: That will not work unless both folder paths are the same. It is a bad idea to have identical diagram costants scattered all over, because any change in code would need identical changes in several places, creating a maintenance headache and potentials for error.)
You need to wire the folder path from the outside to the inside of the loop. Then you also need to sort by modification date to get the newest file.
This assumes you only want *.txt files. Change the pattern if needed.
Here's a quick snippet.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
GetNewestFileInFolder.png ‏38 KB

SQLPLUS: How to verify that java class file have been loaded

Hi All,
I just loaded my Java class file using CREATE OR REPLACE JAVA.
Java was created sucessfuly, but how can I check or find out if my file have been loaded correctly.
I also found a command :
SQL>exec myjava.showobjects
but i don't have the loadjava utility install....is there any command from SQL PLUS?
thanks

Thanks for the sql command....after that query what do I do next to see if for example tree.class is in the dba_object.
Sorry, I am a newbie and the question may be a bit generic .....

Tools for Comparing Java Class Files

Are there any tools out there that can compare two .class files to see if they are the same ?? Please help.
Janet

In Windows there's the FC command that compares two files to see if they are identical. In Unix there is no doubt a similar command. Or you could write a small bit of Java code that reads the two class files and compares them byte by byte.

How to read the data from Excel file and Store in XML file using java

Hi All,
I got a problem with Excel file.
My problem is how to read the data from Excel file and Store in XML file using java excel api.
For getting the data from Excel file what are all the steps i need to follow to get the correct result.
Any body can send me the code (with java code ,Excel sheet) to this mail id : [email protected]
Thanks & Regards,
Sreenu,
[email protected],
india,

If you want someone to do your work, please have the courtesy to provide payment.
http://www.rentacoder.com

How to read the content of ms-word file use pure java???

how to read the content of ms-word file use pure java???

hi,
check this: http://jakarta.apache.org/poi/

How to find the main java class file

I need to write a Java program which MUST know one of these:
1) the full path to the main java class (the class with "main" method)
or
2) access to the main class as byte array.
If i know (1) then I have no problems reading the main class into byte array, but the main target is still (2).
Another option is if the main file is in JAR, which again leads to problems, because I cannot access the file in normal way, but I still need access to the exact byte stream.
Any help is highly appreciated! Thanks!
<<< Ivan Davidov >>>

You could try somthing like this in your main-method:
InputStream is = getClass().getResourceAsStream(<"myModifiedPackageName/MyClass.class">);I don't know if this works though.
Have a look at the API doc for this method.
-Puce

How to read the java class file to convert it in java.

Similar Messages

Maybe you are looking for