Monitoring of a file in java

Hi All,
Can anyone tell me that can we monitor a file in java which is available in a Shared Location in my system.
I just want to log the user information,time of access of the file.
Can anyone help me in this situation?
Thanks in advance
Senthil Kumar.S

If you are on Windows there is an API ReadDirectoryChangesW that you can call using JNI. This call is supposed to block until the file is changed. At that point your code can check to see what happened.
I tried using it a while back but found it to be problematic. It could just be that it was my first attempt at JNI and I was doing something wrong, but I eventuallu gave up and created a thread that simply polled the file every 2 seconds. In my case the file was on a local driver so there really wasn't much overhead. You may want to think twice about doing this over the network, however.
If you want to try to use the JNI call I found most of my information here
HTH

Similar Messages

Error in file-webservice- file (Error: java.lang.NullPointerException)

Hi everybody,
I have configured a file-webservice-file without BPM scenario...as explained by Bhavesh in the following thread:
File - RFC - File without a BPM - Possible from SP 19.
I have used a soap adapter (for webservice) instead of rfc .My input file sends the date as request message and gets the sales order details from the webservice and then creates a file at my sender side.
1 communication channel for sender file
1 for receiver soap
1 for receiver file
Error: java.lang.NullPointerException
What could be the reason for this error
thanks a lot
Ramya

Hi Tanaya,
I monitored the channels in the Runtime work bench and the error is in the sender ftp channel.The other 2 channel status is "not used" in RWB.
1 sender ftp channel
1 receiver soap channel
1 receiver ftp channel.
2009-12-16 15:02:00 Information Send binary file "b.xml" from ftp server "10.58.201.122:/", size 194 bytes with QoS EO
2009-12-16 15:02:00 Information MP: entering1
2009-12-16 15:02:00 Information MP: processing local module localejbs/AF_Modules/RequestResponseBean
2009-12-16 15:02:00 Information RRB: entering RequestResponseBean
2009-12-16 15:02:00 Information RRB: suspending the transaction
2009-12-16 15:02:00 Information RRB: passing through ...
2009-12-16 15:02:00 Information RRB: leaving RequestResponseBean
2009-12-16 15:02:00 Information MP: processing local module localejbs/CallSapAdapter
2009-12-16 15:02:00 Information The application tries to send an XI message synchronously using connection File_http://sap.com/xi/XI/System.
2009-12-16 15:02:00 Information Trying to put the message into the call queue.
2009-12-16 15:02:00 Information Message successfully put into the queue.
2009-12-16 15:02:00 Information The message was successfully retrieved from the call queue.
2009-12-16 15:02:00 Information The message status was set to DLNG.
2009-12-16 15:02:02 Error The message was successfully transmitted to endpoint com.sap.engine.interfaces.messaging.api.exception.MessagingException: Received HTTP response code 500 : Internal Server Error using connection File_http://sap.com/xi/XI/System.
2009-12-16 15:02:02 Error The message status was set to FAIL.
Now, the error is internal server error.What can I do about this?
thanks a lot
Ramya

Setup and configuration for system monitoring and IT Reporting for Java sys

Hi all,
How to setup and configuration for system monitoring and IT Reporting for Java system ?
How to connect Java system to Solman system?
Regards,
Neni

HI,
What is your OS? You can use SAPCCMSR.exe to monitoring IT Reporting Java system on Solman.
Go to solman rz21 create a csmreg user. and configuration fil for agent. copy configuration fil on usr/sap/ccms/..
Go to comman line cd ../user/sap/xxx/sys/exe/.../ wite SAPCCMSR.00 -R pf=< ...../sys/profile/instans profile> .
You can se agent on rz10 and use this connaction on rz20 to monitoring and IT Reporting Java system on Solman.
I hope this help

Creation of .RTF file in java

Hi,
I want to create/edit .RTF file through java application. In my RTF file, I should be able to edit data(formatting), inserting tables. This is already done. Now I want to create chart (like pie-chart) using java. I searched the net for the last couple of days but I couldn't get the proper help. I can do that in SWING but its of no use.
can anyone help me in this?
Thanks & Regards,
mrP

Hi,
Can someone please point me in the right direction? I'm trying to create an RTF file from data in a database, so I have no need to use JTextPanel or any GUI components. I've been trying to use the RTFEditorkit with a DefaultStyledDocument, but can only manage to insert one line into the document(!) Does anyone have any suggestions or examples that would explain how to do this?
Any ideas would be appreciated.
Thanks in advance,
Gillian

Generation of XML file from Java objects using castor

I have the following java file(Customer.java).
public class Customer
     private String ID;
     private FirstName firstName;
     private MiddleName middleName;
     private LastName lastName;
     private ArrayList address;
     public ArrayList getAddress() {
          return address;
     public void setAddress(ArrayList address) {
          this.address = address;
     public FirstName getFirstName() {
          return firstName;
     public void setFirstName(FirstName firstName) {
          this.firstName = firstName;
     public String getID() {
          return ID;
     public void setID(String id) {
          ID = id;
     public LastName getLastName() {
          return lastName;
     public void setLastName(LastName lastName) {
          this.lastName = lastName;
     public MiddleName getMiddleName() {
          return middleName;
     public void setMiddleName(MiddleName middleName) {
          this.middleName = middleName;
Using castor i have created an xml file(customer.xml) which has the following format.
<?xml version="1.0" encoding="UTF-8" ?>
- <customer ID="fbs0001">
<FIRSTNAME>Fred</FIRSTNAME>
<MIDDLENAME>B</MIDDLENAME>
<LASTNAME>Scerbo</LASTNAME>
- <ADDRESS>
<FIRSTLINE>No 18, Sheshadri road</FIRSTLINE>
<SECONDLINE>Gandhinagar Bangalore</SECONDLINE>
</ADDRESS>
- <ADDRESS>
<FIRSTLINE>ITPL</FIRSTLINE>
<SECONDLINE>Whitefield Bangalore</SECONDLINE>
</ADDRESS>
</customer>
I have used a mapping file to get this output.Is there a way where i can get the output xml in the following format without changing the Java object structure.If yes then please suggest how this can be done.
<?xml version="1.0" encoding="UTF-8" ?>
- <customer ID="fbs0001">
<FIRSTNAME>Fred</FIRSTNAME>
<MIDDLENAME>B</MIDDLENAME>
<LASTNAME>Scerbo</LASTNAME>
</customer>
<ADDRESS>
<FIRSTLINE>No 18, Sheshadri road</FIRSTLINE>
<SECONDLINE>Gandhinagar Bangalore</SECONDLINE>
</ADDRESS>
- <ADDRESS>
<FIRSTLINE>ITPL</FIRSTLINE>
<SECONDLINE>Whitefield Bangalore</SECONDLINE>
</ADDRESS>
I mean the output xml file should have the address as a separate tag not withing the root tag customer.

Hello,
Castor's own discussion groups might be able to point you to the solution you're looking for (if this use case is possible using Castor).
Oracle has its own object-to-XML mapping tool that is part of the TopLink product. It allows you to map existing objects to an existing XML Schema. This can be done visually using the TopLink Workbench, or programmatically using the TopLink APIs. TopLink OXM also supports the JAXB specification.
Using TopLink OXM to get the desired XML result I would recommend the following. Map the Customer and Address classes to XML, but don't map the relationship between Customer and Address. Then make the calls to the marshaller something like the following:
marshaller.marshal(aCustomer, System.out);
for(int x=0; x<aCustomer.getAddress().size(); x++) {
     marshal(aCustomer.getAddress().get(x), System.out);
Example - Using TopLink OXM to map an existing object model to an existing XML Schema:
http://www.oracle.com/technology/products/ias/toplink/preview/10.1.3dp4/howto/ox/index.htm
For more information on TopLink object-to-XML mapping:
http://www.oracle.com/technology/products/ias/toplink/preview/10.1.3dp4/objectxml/index.html
-Blaise

Generation of xml file from java code

hi,
I want to manipulate data in a xml file with java code.I have read data from xml file and also changed it. But i am unable to covert it again in xml file from java code. Can you please tell me how i can do this?

Let me know which parser are you using currently for reading xml files so that i assist you. For now, you can refer to STAX Parser API under this link
http://java.sun.com/webservices/docs/1.6/tutorial/doc/SJSXP3.html

Error reading zip file in Java 6

We have a bespoke installer program that fails, intermittently, in Java 6 on Windows. After installing some files, it then fails with a stack trace like this:
java.util.zip.ZipException: error reading zip file
     at java.util.zip.ZipFile.read(Native Method)
     at java.util.zip.ZipFile.access$1200(ZipFile.java:29)
     at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:447)
     at java.util.zip.ZipFile$1.fill(ZipFile.java:230)
     at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:141)
     at java.io.FilterInputStream.read(FilterInputStream.java:90)
     at com.XXXX.trent.installer.Installer.writeStreamToFile(Unknown Source)
     at com.XXXX.trent.installer.Installer.installFile(Unknown Source)
     at com.XXXX.trent.installer.PatchFileInstaller.installFile(Unknown Source)
     at com.XXXX.trent.installer.PatchFileInstaller.installFiles(Unknown Source)
     at com.XXXX.trent.installer.UpgradeInstaller$TpfAction.run(Unknown Source)
     at com.XXXX.trent.installer.UpgradeInstaller.runActions(Unknown Source)
     at com.XXXX.trent.installer.UpgradeInstaller.install(Unknown Source)
     at com.XXXX.trent.installer.TrentInstall$SoftwareInstallStage.install(Unknown Source)
     at com.XXXX.trent.installer.TrentInstall$UpgradeInstallWorker.install(Unknown Source)
     at com.XXXX.trent.installer.PatchInstall$InstallWorker.construct(Unknown Source)
     at com.XXXX.trent.utils.SwingWorker$2.run(Unknown Source)
     at java.lang.Thread.run(Thread.java:619)The same code works in Java 5 on the same environments that it now fails in Java 6 (1.6.0_16).
Any ideas?
Thanks.

gimbal2 wrote:
it is not weird, it is a bug in the application. Don't let the upgrade from Java 5 to Java 6 make you believe otherwise.It's a singularly bad exception message though. I would have thought that something from java.util might be a bit more explicit about what the problem is.
Winston

How to read Excel file in java

Respected sir/madam
I want to read the values from Excel file in Java program. How can I do that. When I searched over the net I came to know that you can treat Excel file as a Database and write the code as u write for making DB connections .
I did that but i am getting the following error ..can anybody please help..
This is the code what i have written
import java.io.*;
import java.sql.*;
public class ReadExcelFile {
Connection c;
Statement stmnt;
public void checkABA_Number()
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
c = DriverManager.getConnection("jdbc:odbc:ExcelTest","",""); // ExcelTest is the DSN name
stmnt = c.createStatement();
ResultSet rs = stmnt.executeQuery("select * from abadata"); // abadata is my Excel file name
while(rs.next())
System.out.println(rs.getString(1)+" "+rs.getString(2));
}catch(Exception e)
System.out.println(""+e.toString());
finally
try
stmnt.close();
c.close();
catch( Exception e )
System.err.println( e );
public static void main(String[] args)
new ReadExcelFile().checkABA_Number();
My Excel file starts from the first row and first column and also the first row contains the names of the column.
It give me the following error..
java.sql.SQLException: [Microsoft][ODBC Excel Driver] The Microsoft Jet database engine could not find the object 'abadata'. Make sure the object exists and that you spell its name and the path name correctly.
How can I deal with this.?I have properly selected the worksheet while giving the DSN . Is there any versionig problem with Excel or some drivers are in appropriate..and yes i chose Microsoft Excel Driver (.xsl) from ODBC .
I created System DSN.
Can anybody please help me with this ? I will be very gratefull for replies
Thanks in advance

here is the code to read excel file
public void readexel(String filename)
Connection c = null;
Statement stmnt = null;
try
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
c = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Excel Driver (*.xls)};DBQ=" + filename);
stmnt = c.createStatement();
String query = "Select * from [Sheet1$]" ;
ResultSet rs = stmnt.executeQuery( query );
while( rs.next() )
System.out.println( rs.getString(1) );
catch( Exception e )
System.err.println( e );
}

Executing batch file from Java stored procedure hang

Dears,
I'm using the following code to execute batch file from Java Stored procedure, which is working fine from Java IDE JDeveloper 10.1.3.4.
public static String runFile(String drive)
String result = "";
String content = "echo off\n" + "vol " + drive + ": | find /i \"Serial Number is\"";
try {
File directory = new File(drive + ":");
File file = File.createTempFile("bb1", ".bat", directory);
file.deleteOnExit();
FileWriter fw = new java.io.FileWriter(file);
fw.write(content);
fw.close();
// The next line is the command causing the problem
Process p = Runtime.getRuntime().exec("cmd.exe /c " + file.getPath());
BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while ((line = input.readLine()) != null)
result += line;
input.close();
file.delete();
result = result.substring( result.lastIndexOf( ' ' )).trim();
} catch (Exception e) {
e.printStackTrace();
result = e.getClass().getName() + " : " + e.getMessage();
return result;
The above code is used in getting the volume of a drive on windows, something like "80EC-C230"
I gave the SYSTEM schema the required privilege to execute the code.
EXEC DBMS_JAVA.grant_permission('SYSTEM', 'java.io.FilePermission', '<<ALL FILES>>', 'read ,write, execute, delete');
EXEC DBMS_JAVA.grant_permission('SYSTEM', 'SYS:java.lang.RuntimePermission', 'writeFileDescriptor', '');
EXEC DBMS_JAVA.grant_permission('SYSTEM', 'SYS:java.lang.RuntimePermission', 'readFileDescriptor', '');
GRANT JAVAUSERPRIV TO SYSTEM;
I have used the following to load the class in Oracle 9ir2 DB:
loadjava -u [system/******@orcl|mailto:system/******@orcl] -v -resolve C:\Server\src\net\dev\Util.java
CREATE FUNCTION A1(drive IN VARCHAR2) RETURN VARCHAR2 AS LANGUAGE JAVA NAME 'net.dev.Util.a1(java.lang.String) return java.lang.String';
variable serial1 varchar2(1000);
call A1( 'C' ) into :serial1;
The problem that it hangs when I execute the call to the function (I have indicated the line causing the problem in a comment in the code).
I have seen similar problems on other forums, but no solution posted
[http://oracle.ittoolbox.com/groups/technical-functional/oracle-jdeveloper-l/run-an-exe-file-using-oracle-database-trigger-1567662]
I have posted this in JDeveloper forum ([t-853821]) but suggested to post for forum in DB.
Can anyne help?

Dear Peter,
You are totally right, I got this as mistake copy paste. I'm just having a Java utility for running external files outside Oracle DB, this is the method runFile()
I'm passing it the content of script and names of file to be created on the fly and executed then deleted, sorry for the mistake in creating caller function.
The main point, how I claim that the line in code where creating external process is the problem. I have tried the code with commenting this line and it was working ok, I made this to make sure of the permission required that I need to give to the schema passing security permission problems.
The function script is running perfect if I'm executing vbs script outside Oracle using something like "cscript //NoLogo aaa1.vbs", but when I use the command line the call just never returns to me "cmd.exe /c bb1.bat".
where content of bb1.bat as follows:
echo off
vol C: | find /i "Serial Number is"
The above batch file just get the serial number of hard drive assigned when windows formatted HD.
Same code runs outside Oracle just fine, but inside Oracle doesn't return if I exectued the following:
variable serial1 varchar2(1000);
call A1( 'C' ) into :serial1;
Never returns
Thanks for tracing teh issue to that details ;) hope you coul help.

JNI Invocation: open file in Java, write file in CPP

Hello,
Warning: I am a dunce, bad CPP code ahead!
Using JNI invocation, I am trying to read a binary file in Java and write it in CPP.
Everything compiles and runs without error, but the input and output jpg files are of course different.
TIA to any help,
kirst
(begin ByteMe.java)
import java.io.*;
public class ByteMe
    // Returns the contents of the file in a byte array.
    public byte[] getBytesFromFile(String strInfo) throws IOException
        System.out.println("Testing:" + strInfo);
        File file = new File("1.jpg");
        InputStream is = new FileInputStream(file);
        // Get the size of the file
        long length = file.length();
        // Create the byte array to hold the data
        byte[] bytes = new byte[(int)length];
        // Read in the bytes
        int offset = 0;
        int numRead = 0;
        while (offset < bytes.length
               && (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0) {
            offset += numRead;
        // Ensure all the bytes have been read in
        if (offset < bytes.length)
            throw new IOException("Could not completely read file "+file.getName());
        // Close the input stream and return bytes
        is.close();
        return bytes;
    public ByteMe()
          //System.out.println("in constructor");
}(end ByteMe.java)
(begin ByteMe.cpp)
#include <stdlib.h>
#include <string.h>
#include <jni.h>
#include <windows.h>
// for file operations:
#include <fstream>
int main( int argc, char *argv[] )
     JNIEnv *env;
     JavaVM *jvm;
     JavaVMInitArgs vm_args;
     JavaVMOption options[5];
     jint res;
     jclass cls;
     jmethodID mid;
     jstring jstr;
     jobject obj_print;
     options[0].optionString = "-Xms4M";
     options[1].optionString = "-Xmx64M";
     options[2].optionString = "-Xss512K";
     options[3].optionString = "-Xoss400K";
     options[4].optionString = "-Djava.class.path=.";
     vm_args.version = JNI_VERSION_1_4;
     vm_args.options = options;
     vm_args.nOptions = 5;
     vm_args.ignoreUnrecognized = JNI_FALSE;
     // Create the Java VM
     res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
     if (res < 0)
          printf("Can't create Java VM");
          goto destroy;
     cls = env->FindClass("ByteMe");
     if (cls == 0)
          printf("Can't find ByteMe class");
          goto destroy;
     jmethodID id_construct = env->GetMethodID(cls,"<init>","()V");
     jstr = env->NewStringUTF(" from C++\n");
     obj_print = env->NewObject(cls,id_construct);
     // signature obtained using javap -s -p ByteMe
     mid = env->GetMethodID(cls, "getBytesFromFile", "(Ljava/lang/String;)[B");
     if (mid == 0)
          printf("Can't find ByteMe.getBytesFromFile\n");
          goto destroy;
     else
          jbyteArray jbuf = (jbyteArray) env->CallObjectMethod(obj_print,mid,jstr);
          jlong size = jsize(jbuf);
          printf("size is: %d\n", size); // size shown in output is
          std::ofstream out("data.jpg", std::ios::binary);
          out.write ((const char *)jbuf, 100000);
     destroy:
         if (env->ExceptionOccurred())
            env->ExceptionDescribe();
    jvm->DestroyJavaVM();
}(end ByteMe.cpp)

Hello,
Me again. Well, not such a dunce after all. Here is code that works correctly, and compiles with no errors and no warnings.
Will much appreciate help with clean-up code.
TIA,
kirst
(begin ByteMe.java)
import java.io.*;
public class ByteMe
    public long getFilezize(String strInfo) throws IOException
          // demonstrates String parameter passed from CPP to Java:
          System.out.println("(getFilesize) Hello world" + strInfo);
          File file = new File("1.bmp");
          InputStream is = new FileInputStream(file);
          // Get the size of the file
          long length = file.length();
          is.close();
          return length;
    // Returns the contents of the file in a byte array.
    public byte[] getBytesFromFile(String strInfo) throws IOException
        System.out.println("(getBytesFromFile) Hello world" + strInfo);
        File file = new File("1.bmp");
        InputStream is = new FileInputStream(file);
        // Get the size of the file
        long length = file.length();
        System.out.println("length is: " + String.valueOf(length));
        // Create the byte array to hold the data
        byte[] bytes = new byte[(int)length];
        // Read in the bytes
        int offset = 0;
        int numRead = 0;
        while (offset < bytes.length && (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0)
            offset += numRead;
        // Ensure all the bytes have been read in
        if (offset < bytes.length)
            throw new IOException("Could not completely read file "+ file.getName());
        // Close the input stream and return bytes
        is.close();
        return bytes;
    public ByteMe()
          //System.out.println("in constructor");
}(end ByteMe.java)
(begin ByteMe.cpp)
          Signature obtained with command:
               "C:\Program Files\Java\jdk1.5.0_15\bin\javap.exe" -s -p ByteMe
               Compiled from "ByteMe.java"
               public class ByteMe extends java.lang.Object{
               public long getFilezize(java.lang.String)   throws java.io.IOException;
                 Signature: (Ljava/lang/String;)J
               public byte[] getBytesFromFile(java.lang.String)   throws java.io.IOException;
                 Signature: (Ljava/lang/String;)[B
               public ByteMe();
                 Signature: ()V
     Compiled VC++ 2005 Express, run on Vista
#include <stdlib.h>
#include <string.h>
#include <jni.h>
// file operations
#include <fstream>
int main( int argc, char *argv[] )
     JNIEnv *env;
     JavaVM *jvm;
     JavaVMInitArgs vm_args;
     JavaVMOption options[5];
     jint res;
     jclass cls;
     jmethodID mid;
     jmethodID sizeid;
     jstring jstr;
     jobject obj_print;
     jlong filesize;
     options[0].optionString = "-Xms4M";
     options[1].optionString = "-Xmx64M";
     options[2].optionString = "-Xss512K";
     options[3].optionString = "-Xoss400K";
     options[4].optionString = "-Djava.class.path=.";
     vm_args.version = JNI_VERSION_1_4;
     vm_args.options = options;
     vm_args.nOptions = 5;
     vm_args.ignoreUnrecognized = JNI_FALSE;
     // Create the Java VM
     res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
     if (res < 0)
          printf("Can't create Java VM");
          goto destroy;
     cls = env->FindClass("ByteMe");
     if (cls == 0)
          printf("Can't find ByteMe class");
          goto destroy;
     jmethodID id_construct = env->GetMethodID(cls,"<init>","()V");
     printf("%s\n",id_construct);
     jstr = env->NewStringUTF(" from C++!\n");
     if (jstr == 0)
          // Normally not useful
          printf("Out of memory (could not instantiate new string jstr)\n");
          goto destroy;
     obj_print = env->NewObject(cls,id_construct);
     //BEGIN BLOCK to get file size
     sizeid = env->GetMethodID(cls, "getFilezize", "(Ljava/lang/String;)J");
     if (sizeid == 0)
          printf("Can't find ByteMe.getFilezize\n");
          goto destroy;
     else
          printf("got here\n");
          filesize =(jlong) env->CallObjectMethod(obj_print,sizeid,jstr);
          printf("got filesize\n");
     // END BLOCK to get file size
     // BEGIN BLOCK to write file
     mid = env->GetMethodID(cls, "getBytesFromFile", "(Ljava/lang/String;)[B");
     if (mid == 0)
          printf("Can't find ByteMe.getBytesFromFile\n");
          goto destroy;
     else
          jbyteArray ret =(jbyteArray) env->CallObjectMethod(obj_print,mid,jstr);
          // Access the bytes:
          jbyte *retdata = env->GetByteArrayElements(ret, NULL);
          // write the file
          std::ofstream out("data.bmp", std::ios::binary);
          //out.write ((const char *)retdata, 921654);
          out.write ((const char *)retdata, (long)filesize);
     // END BLOCK to write file
     destroy:
         if (env->ExceptionOccurred())
            env->ExceptionDescribe();
    jvm->DestroyJavaVM();
}(end ByteMe.cpp)

How to read pdf files using java.io package classes

Dear All,
I have a certain requirement that i should read and write PDF files at runtime. With normal java file IO reading is not working. Can any one suggest me how to proceed probably with sample code block
Thanks in advance.

hi I also have the pbm. to read pdf file using JAVA
can any body help meWhy is it so difficult to read the thread you posted in? They say: java.io is pointless, use iText. So why don't you?
or also I want to read a binary encoded data into
ascii,
can anybody give me a hint how to do it.Depends on what you mean with "binary encoding". ASCII's binary encoding, too, basically.

Create crystal report file using JAVA

Can someone tell me how to a Create crystal report file using JAVA Programming
I want a very simple example

Please help me. It's urgent.[http://catb.org/~esr/faqs/smart-questions.html#urgent]
Be back in an hour or two...

How to create and edit a .ini file using java

Hi All...
Pls help me in creating and editing an .ini file using java...
thanks in advance
Regards,
sathya

Let's assume the ini file is a mapping type storage (key=value) so lets use Properties object. (works with java 1.4 & up)
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;
public class Test {
     private static Properties props;
     public static void main(String[] args) throws IOException {
          File file = new File("test.ini");//This is out ini file
          props = new Properties();//Create the properties object
          read(file);//Read the ini file
          //Once we've populated the Properties object. set/add a property using the setProperty() method.
          props.setProperty("testing", "value");
          write(file);//Write to ini file
     public static void read(File file) throws IOException {
          FileInputStream fis = new FileInputStream(file);//Create a FileInputStream
          props.load(fis);//load the ini to the Properties file
          fis.close();//close
     public static void write(File file) throws IOException {
          FileOutputStream fos = new FileOutputStream(file);//Create a FileOutputStream
          props.store(fos, "");//write the Properties object values to our ini file
          fos.close();//close
}

How to compare and edit Resource bundle file using java programe

Hi All
I have two resource bundle with key, value and some comments. I need to write a java code to compare both of the values of the keys and if the values are different then i want to replace the second value with the first value.
Its a programe which will udpate the second file with the first file values.
I tried using Properties class but it didnt worked because when i am saving the file using store method it removes all the comments and the order of text also got disturbed.
How I need to do this any help appriciated.
Please elt me know if someone needs more info.
Thanks in advance.

Let's assume the ini file is a mapping type storage (key=value) so lets use Properties object. (works with java 1.4 & up)
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;
public class Test {
     private static Properties props;
     public static void main(String[] args) throws IOException {
          File file = new File("test.ini");//This is out ini file
          props = new Properties();//Create the properties object
          read(file);//Read the ini file
          //Once we've populated the Properties object. set/add a property using the setProperty() method.
          props.setProperty("testing", "value");
          write(file);//Write to ini file
     public static void read(File file) throws IOException {
          FileInputStream fis = new FileInputStream(file);//Create a FileInputStream
          props.load(fis);//load the ini to the Properties file
          fis.close();//close
     public static void write(File file) throws IOException {
          FileOutputStream fos = new FileOutputStream(file);//Create a FileOutputStream
          props.store(fos, "");//write the Properties object values to our ini file
          fos.close();//close
}

How to read some records from a text file into java(not all records)

hello,
how to read text files into java. i need only few records from the text file not all records at a time.
If any one knows plz reply me
my id is [email protected]

this snipet reads a text file line by line from line 1 to 3
try {
              FileReader fr = new FileReader(directory);
              BufferedReader br = new BufferedReader(fr);
              int counter = 0;
              while ((dbconn = br.readLine()) != null) {
                  switch(counter){
                      case 0:
                        status = dbconn;
                      break;
                      case 1:
                        userName = dbconn;
                      break;
                      case 2:
                        apword = dbconn;
                      break;
                  counter++;
              br.close();
    }catch(IOException e){
    }

Monitoring of a file in java

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