Classloader that can use embedded .jar files?
Hey all,
Has anyone had a need like myself to be able to jar up everything including embedded .jar files, and have the code in the "outter" .jar file use code from any of the inner embedded .jar files without the need to unjar the outter jar to disk? It seems this is not possible. Even if I put the embeded .jar files in the manifest.mf file in the Class-Path section, it does NOT find classes in the embedded .jar files. Instead, it only finds them if I unjar the outter .jar file to disk!
I would love to know if there is a custom classloader written that will find and use classes from embedded .jar files without the need to unjar them.
Thanks.
Is there any web appliction server or j2ee server that has their own classloader to dynamically extract and hunt down things within a .ear or .war file without unarchiving it to disk? It appears that everyone I have ever seen creates a temporary file on disk.
A fellow colleague of mine indicated that with today's computer speeds, it is actually faster in most cases to read/decompress on the fly in memory than it is to decompress to disk, then read from disk. The reason being that one of the biggest bottlenecks is IO. Reading an uncompressed file from disk may be slower than reading a compressed file from disk. The IO is slow, but the speed of a largely compressed file to uncompress is faster than reading the entire thing from the HD. This may not always be the case. Considering OS caching of recent file use from the HD, etc.
Similar Messages
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How can i create Jar file using Eclipse IDE.
Hi Guys
Am new to java. I want convert my project into executable jar file.
In my project am using itext.jar.And some other folder.
already i create jar file.But its not working.only its working 4 modules after that its say file cannot found exception.but the file path is correct.i dont know why its happen.
This is my project folder strutre also
Log:->
src(folder)
logs(folder)
comments(folder)
lib-->itext.jar.
images-->1,gif
properties-->catconfig.properties (file)
now can i create jar file
this code also show error when i run the jar file
And this is my catconfig. properties file
fileName=total_system_log.log
DDSingle=DD_bysingleIP_comment.txt
DDRange=DD_byrange_comment.txt
NDPing=ping_comments.txt
NDFPing=fping_comments.txt
reportFileName=report.txt
moduleFileName=Modules.txt
propFileName=nameDetails.properties
Choice=DDSingle
logFileName=DDSingleIP_10.32.0.2.log
finalReport=FinalReport.txt
logFilePath=\logs\
commentFilePath=\\Comments\\
its very urgent for me . could u pls send my error and u r ideas.
thanks for u r Ansewering.
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.RandomAccessFile;
import java.util.Properties;
import java.util.ResourceBundle;
import java.util.ArrayList;
public class LogReader {
public void getValuesFromFilesOnly(String Choice,String logFileName)
try {
ArrayList commentsList = new ArrayList();
ArrayList tempList = new ArrayList();
String userdir = System.getProperty("user.dir");
String logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
String commentDir =ResourceBundle.getBundle("catconfig").getString(Choice);
String commentFilePath=ResourceBundle.getBundle("catconfig").getString("commentFilePath");
String currentdir1 =userdir+logFilePath+logFileName;
StringBuffer strBuff=new StringBuffer();
RandomAccessFile randomFile = null;
RandomAccessFile commentsFile = null;
String tempLine = null;
String commentLine = null;
String catVersion = null;
String finalReport=null;
int colon = 0;
int counter = 0;
boolean startFlag = false;
boolean endFlag = false;
boolean endOfFileFlag = false;
System.out.println("Log file checked----->"+currentdir1);
System.out.println("comments file used--->"+commentDir);
try {
randomFile = new RandomAccessFile(currentdir1, "r");
} catch (Exception e) {
System.out.println("exception@getValuesFromFilesOnly@begin : "+e);
System.out.println("hi test1");
String commentDir1=userdir+commentFilePath+commentDir;
try{
System.out.println("Comment Dir:"+commentDir1);
commentsFile = new RandomAccessFile(commentDir1, "r");
catch (Exception e) {
System.out.println("exception@getValuesFromCommentDirOnly@begin : "+e);
while ((commentLine = commentsFile.readLine()) != null) {
String checkLine = commentLine.substring(commentLine.indexOf("=")+1, commentLine.length());
String message = commentLine.substring(0,commentLine.indexOf("="));
commentsList.add(checkLine);
commentsFile.close();
String startComment = (String)commentsList.get(0);
String endComment = (String)commentsList.get(commentsList.size()-1);
strBuff.append(" CAT LOG REPORT \n\n");
while ((tempLine = randomFile.readLine()) != null) {
if(tempLine.contains("CAT version is :"))
colon = tempLine.indexOf("is :");
catVersion = tempLine.substring(colon+4,tempLine.length());
String version=tempLine;
strBuff.append("Version : "+catVersion+"\n");
System.out.println("catVersion is :"+catVersion);
commentsFile = new RandomAccessFile(commentDir1, "r");
while ((commentLine = commentsFile.readLine()) != null) {
String checkLine = commentLine.substring(commentLine.indexOf("=")+1, commentLine.length());
String message = commentLine.substring(0,commentLine.indexOf("="));
checkLine=checkLine.toLowerCase();
tempLine=tempLine.toLowerCase();
if(tempLine.contains(checkLine))
colon = tempLine.indexOf("info -");
catVersion = tempLine.substring(colon+7,tempLine.length());
strBuff.append(message+" ==> "+catVersion+"\n");
System.out.println(message+" ==> "+catVersion);
tempList.add(message+" ==> "+catVersion);
if (catVersion.contains(startComment)){
startFlag = true;
counter++;
System.out.println("*******startFlag**********"+startFlag);
if (catVersion.contains(endComment)){
endFlag = true;
System.out.println("*******endFlag**********"+endFlag);
if (startFlag == true && endFlag == true){
System.out.println("******************************************");
System.out.println("-------------Successfull completion-------");
System.out.println("******************************************");
startFlag = false;
endFlag = false;
counter = 0;
tempList.clear();
if (startFlag == true && endFlag == false && counter > 1){
System.out.println("******************************************");
System.out.println("---------------Failure after-----:"+tempList.get(tempList.size()-1));
System.out.println("******************************************");
//startFlag = false;
//endFlag = false;
counter = 0;
tempList.clear();
commentsFile.close();
endOfFileFlag = true;
if (startFlag == true && endFlag == false && endOfFileFlag == true){
System.out.println("******************************************");
System.out.println("---------------Failure after-----:"+tempList.get(tempList.size()-1));
System.out.println("******************************************");
startFlag = false;
endFlag = false;
counter = 0;
tempList.clear();
randomFile.close();
System.out.println("hi");
finalReport=ResourceBundle.getBundle("catconfig").getString("finalReport");
savereportFile(strBuff,finalReport);
System.out.println("Report Generated");
} catch (Exception e){
System.out.println("Exception@getValuesFromFilesOnly : "+e);
public void findDetails()
String currentdir1 = ResourceBundle.getBundle("catconfig").getString("fileName");
String logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
String userdir = System.getProperty("user.dir");
RandomAccessFile randomFile = null;
StringBuffer strBuff=new StringBuffer();
StringBuffer strBuff1=new StringBuffer();
StringBuffer strBuff2=new StringBuffer();
String tempLine = null;
String catVersion = null;
String timeStr=null;
String nameStr=null;
String startIP="";
String endIP="";
String tempStart="";
String tempEnd="";
String reportFileName="";
String moduleFileName="";
String propFileName="";
int startPos=0;
int endPos=0;
int fromIndex=0;
boolean versionFlag=false;
boolean ndFlag=false;
boolean ddFlag=false;
try {
randomFile = new RandomAccessFile(userdir+logFilePath+currentdir1, "r");
while ((tempLine = randomFile.readLine()) != null) {
if(tempLine.contains("CAT version is :") && !versionFlag)
startPos = tempLine.indexOf("is :");
catVersion = tempLine.substring(startPos+4,tempLine.length());
String version=tempLine;
strBuff.append("version : "+version+"\n");
versionFlag=true;
//System.out.println("version : "+version);
if(tempLine.contains("Inside NetworkDiscoverySlider.jsp"))
ndFlag=true;
strBuff.append("ND start : "+tempLine+"\n");
if(tempLine.contains("Inside NetworkDiscoveryDetails.jsp"))
strBuff.append("ND end : "+tempLine+"\n");
//System.out.println(" ND end : "+tempLine);
if(tempLine.contains("Given IPRange from"))
startPos = tempLine.indexOf("from");
catVersion = tempLine.substring(startPos+5,tempLine.length());
strBuff.append("NDRange : "+catVersion+"\n");
//strBuff.append("NDRange : "+tempLine+"\n");
//System.out.println("NDRange :"+catVersion);
startPos=0;
fromIndex=tempLine.indexOf(":");
endPos= tempLine.indexOf(':', fromIndex+2);
//System.out.println("fromIndex : "+fromIndex+" endPos : "+endPos);
timeStr=tempLine.substring(startPos, endPos);
nameStr=catVersion.replaceAll(" ", "_");
strBuff2.append("ND_"+timeStr+" "+catVersion+" = "+"NDRange_"+nameStr+".log\n");
if(tempLine.contains("inside ByIpAddress.jsp"))
ddFlag=true;
strBuff.append("DD Start : "+tempLine+"\n");
if(tempLine.contains("start_IpAddress:"))
startPos = tempLine.indexOf("start_IpAddress:");
catVersion = tempLine.substring(startPos+16,tempLine.length());
startIP=catVersion;
if(tempLine.contains("end_IpAddress"))
startPos = tempLine.indexOf("end_IpAddress");
catVersion = tempLine.substring(startPos+13,tempLine.length());
endIP=catVersion;
if(endIP.length()==0)
System.out.println("hi5");
strBuff.append("DDSingleIP : "+startIP+"\n");
//strBuff.append("DDSingleIP : "+tempLine+"\n");
//System.out.println("DDSingleIP : "+startIP);
//startPos = tempLine.indexOf(" ");
startPos=0;
fromIndex=tempLine.indexOf(":");
endPos= tempLine.indexOf(':', fromIndex+2);
timeStr=tempLine.substring(startPos, endPos);
strBuff2.append("DD_"+timeStr+" "+startIP+" = "+"DDSingleIP_"+startIP+".log\n");
else
strBuff.append("DDRangeIP : "+startIP + " to "+ endIP+"\n");
//strBuff.append("DDRangeIP : "+tempLine+"\n");
//System.out.println("DDRangeIP : "+startIP + " to "+ endIP);
//startPos = tempLine.indexOf(" ");
startPos=0;
fromIndex=tempLine.indexOf(":");
endPos= tempLine.indexOf(':', fromIndex+2);
timeStr=tempLine.substring(startPos, endPos);
strBuff2.append("DD_"+timeStr+" "+startIP+" to "+endIP+" = "+"DDRangeIP_"+startIP +"_to_"+ endIP+".log\n");
if(tempLine.contains("set percentage completedCount: 100"))
System.out.println("hi...1");
strBuff.append("DD End : "+tempLine+"\n");
//System.out.println("DD End : "+tempLine);
reportFileName=ResourceBundle.getBundle("catconfig").getString("reportFileName");
savereportFile(strBuff,reportFileName);
if(ndFlag)
strBuff1.append("Network Discovery\n");
if(ddFlag)
strBuff1.append("Device Discovery\n");
moduleFileName=ResourceBundle.getBundle("catconfig").getString("moduleFileName");
savereportFile(strBuff1,moduleFileName);
propFileName=ResourceBundle.getBundle("catconfig").getString("propFileName");
savereportFile(strBuff2,propFileName);
} catch (Exception e)
System.out.println("error hi1");
System.out.println("Exception@findDetails : "+e);
public void savereportFile(StringBuffer strBuff,String targetFileName)
try{
String userdir = System.getProperty("user.dir");
String logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
String reportFile=userdir+logFilePath+targetFileName;
String fileContent="";
fileContent=strBuff.toString();
//System.out.println("file content : "+fileContent);
FileWriter fileWriter = new FileWriter(reportFile);
if(fileContent!=null)
fileWriter.write(fileContent);
fileWriter.close();
catch(Exception e)
System.out.println("error hi1");
System.out.println("Exception@savereportFile : "+e);
public ArrayList<String> getFileNames()
String reportFile=ResourceBundle.getBundle("catconfig").getString("reportFileName");
String logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
String userdir = System.getProperty("user.dir");
RandomAccessFile repFile=null;
String reportLine = null;
int colon=0;
int fromIndex=0;
int startPos=0;
int endPos=0;
String timeStr="";
String fileName=null;
ArrayList<String> nameList=new ArrayList<String>();
try
reportFile=userdir+logFilePath+reportFile;
repFile = new RandomAccessFile(reportFile, "r");
while ((reportLine = repFile.readLine()) != null) {
if(reportLine.contains("NDRange"))
colon=reportLine.indexOf(" : ");
fileName=reportLine.substring(colon+3, reportLine.length());
fileName="NDRange_"+fileName.replaceAll(" ", "_");
nameList.add(fileName);
System.out.println("fileName : "+fileName);
if(reportLine.contains("DDSingleIP"))
colon=reportLine.indexOf(" : ");
fileName=reportLine.substring(colon+3, reportLine.length());
fileName="DDSingleIP_"+fileName.replaceAll(" ", "_");
nameList.add(fileName);
System.out.println("fileName : "+fileName);
if(reportLine.contains("DDRangeIP"))
colon=reportLine.indexOf(" : ");
fileName=reportLine.substring(colon+3, reportLine.length());
fileName="DDRangeIP_"+fileName.replaceAll(" ", "_");
nameList.add(fileName);
System.out.println("fileName : "+fileName);
repFile.close();
catch(Exception e)
System.out.println("Error@getFileNames : "+e);
return nameList;
public void writeFile(String oldLogName,String newLogName)
try
FileOutputStream writeFile=null;
String line = null;
String userdir = System.getProperty("user.dir");
String reportFile=ResourceBundle.getBundle("catconfig").getString("reportFileName");
String newLogPath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
RandomAccessFile repFile=null;
String reportLine = null;
String tempLine=null;
String prevLine=null;
String nextLine=null;
String target=null;
String tempStr=null;
String startStr=null;
String endStr=null;
int pos=0;
boolean flag=false;
boolean writeFlag=false;
boolean versionFlag=false;
//System.out.println("newLogName : "+newLogName);
newLogPath=userdir+newLogPath;
System.out.println("newLogPath : "+newLogPath);
BufferedReader buffRead = new BufferedReader(new FileReader(oldLogName));
writeFile = new FileOutputStream(newLogPath+newLogName+".log", false);//true-for append mode
DataOutputStream dout=new DataOutputStream(writeFile);
tempStr=newLogName.replace("_", " ");
pos=tempStr.indexOf(" ");
startStr=tempStr.substring(0,pos);
endStr=tempStr.substring(pos+1, tempStr.length());
target=startStr+" : "+endStr;
System.out.println("target ===> "+target);
reportFile=newLogPath+reportFile;
repFile = new RandomAccessFile(reportFile, "r");
while ((reportLine = repFile.readLine()) != null) {
if(reportLine.contains(target))
flag=true;
prevLine=tempLine;
//System.out.println("prevLine *****: "+prevLine);
else
tempLine=reportLine;
if(flag==true)
nextLine=reportLine;
flag=false;
//System.out.println("nextLine *******:"+nextLine);
break;
repFile.close();
if(prevLine!=null && prevLine.length()>0)
pos=prevLine.lastIndexOf(" : ");
prevLine=prevLine.substring(pos+3, prevLine.length());
//System.out.println("prevLine : "+prevLine);
else
System.out.println("Starting line not available for : "+target);
if(nextLine!=null && nextLine.length()>0)
pos=nextLine.lastIndexOf(" : ");
nextLine=nextLine.substring(pos+3, nextLine.length());
//System.out.println("nextLine : "+nextLine);
else
System.out.println("Ending line not available for : "+target);
nextLine=prevLine;
while ((line=buffRead.readLine()) != null) {
if(line.contains("CAT version is :") && !versionFlag)
versionFlag=true;
dout.writeBytes(line+"\n");
if(line.contains(prevLine))
writeFlag=true;
if(line.contains(nextLine))
writeFlag=false;
break;
if(writeFlag)
dout.writeBytes(line+"\n");
dout.writeBytes(nextLine+"\n");
buffRead.close();
System.out.println("done");
catch(Exception e)
System.out.println("Exception@writeFile : "+e.getMessage());
public String folderCheck(String foldName)
File folder=null;
File newFile=null;
String[] folderContent=null;
String tempFileName="";
String newLogName="";
int count=0;
String logFilePath="";
String fileName="";
String feedBackMsg="";
String userdir = System.getProperty("user.dir");
logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
fileName=ResourceBundle.getBundle("catconfig").getString("fileName");
folder=new File(foldName);
if(folder.isDirectory())
newLogName=userdir+logFilePath+fileName;
//System.out.println("newLogName : "+newLogName);
newFile=new File(newLogName);
if(newFile.exists())
newFile.delete();
folderContent= folder.list();
if (folderContent != null && folderContent.length>0)
System.out.println("folder has files : "+folderContent.length);
for(int iterate=0;iterate < folderContent.length;iterate++){
if (folderContent[iterate].toLowerCase().contains("system"))
count++;
tempFileName=foldName+"/"+folderContent[iterate];
try
FileOutputStream appendedFile=null;
BufferedReader buffRead = new BufferedReader(new FileReader(tempFileName));
appendedFile = new FileOutputStream(newLogName, true);//true-for append mode
DataOutputStream dout=new DataOutputStream(appendedFile);
String line = null;
System.out.println("writting : "+tempFileName);
while ((line=buffRead.readLine()) != null) {
dout.writeBytes(line+"\n");
buffRead.close();
//System.out.println("done");
catch(Exception e)
System.out.println("Exception@folderCheck : "+e);
if(count==0)
feedBackMsg="syslognotavail";
//System.out.println("System Log(s) not available");
else
feedBackMsg="syslogavail";
//System.out.println(count +" System log(s) avail");
else
feedBackMsg="filesnotavail";
//System.out.println("Files are not in the folder");
else
feedBackMsg="Dirnotavil";
//System.out.println("Directory not exists in the given name");
return feedBackMsg;
public ArrayList<String> loadFileContent(String selectedStr)
//System.out.println("inside loadFileContent()");
String logFilePath="";
String propFileName="";
String line="";
String choice="";
String tempStr="";
int startPos=0;
int endPos=0;
ArrayList<String> timeList=new ArrayList<String>();
String userdir = System.getProperty("user.dir");
try
logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
propFileName=ResourceBundle.getBundle("catconfig").getString("propFileName");
propFileName=userdir+logFilePath+propFileName;
BufferedReader buffRead = new BufferedReader(new FileReader(propFileName));
if(selectedStr.equalsIgnoreCase("Device Discovery"))
choice="DD";
else if(selectedStr.equalsIgnoreCase("Network Discovery"))
choice="ND";
while ((line=buffRead.readLine()) != null) {
if(line.contains(choice))
System.out.println(line);
startPos=line.indexOf("_");
endPos=line.indexOf(" =");
tempStr=line.substring(startPos+1, endPos);
System.out.println("tempStr : "+tempStr);
timeList.add(tempStr);
buffRead.close();
catch(Exception e)
System.out.println("Exception@loadFileContent : "+e);
return timeList;
public String getFileName(String timeStr)
System.out.println("inside getFileName");
String logFilePath="";
String propFileName="";
String line="";
String tempStr="";
int startPos=0;
String userdir = System.getProperty("user.dir");
try
logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
propFileName=ResourceBundle.getBundle("catconfig").getString("propFileName");
propFileName=userdir+logFilePath+propFileName;
BufferedReader buffRead = new BufferedReader(new FileReader(propFileName));
while ((line=buffRead.readLine()) != null) {
if(line.contains(timeStr))
System.out.println(line);
startPos=line.indexOf(" = ");
tempStr=line.substring(startPos+3, line.length());
System.out.println("tempStr : "+tempStr);
buffRead.close();
catch(Exception e)
System.out.println("Exception@loadFileContent : "+e);
return tempStr;
public ArrayList loadFile()
String logFilePath="";
String moduleFileName="";
String line="";
ArrayList<String> moduleList=new ArrayList<String>();
String userdir = System.getProperty("user.dir");
try
logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
moduleFileName=ResourceBundle.getBundle("catconfig").getString("moduleFileName");
moduleFileName=userdir+logFilePath+moduleFileName;
BufferedReader buffRead = new BufferedReader(new FileReader(moduleFileName));
while ((line=buffRead.readLine()) != null) {
moduleList.add(line);
buffRead.close();
catch(Exception e)
System.out.println("Exception@loadFile : "+e);
return moduleList;
public static void main(String[] args) {
System.out.println("Inside main");
//String userdir = System.getProperty("user.dir");
//System.out.println("userdir : "+userdir);
/*ArrayList<String> fileNameList=new ArrayList<String>();
String Choice="";
String logFileName="";
String logFilePath="";
String totalLog="";
String newLog="";
String folderName="";
Choice=ResourceBundle.getBundle("catconfig").getString("Choice");
logFileName=ResourceBundle.getBundle("catconfig").getString("logFileName");
logFilePath=ResourceBundle.getBundle("catconfig").getString("logFilePath");
folderName=ResourceBundle.getBundle("catconfig").getString("folderName");
totalLog=ResourceBundle.getBundle("catconfig").getString("fileName"); */
/*try
//to write the total log
//folderCheck(folderName);
//to find the details in the given log
//findDetails();
//to split the logs accordingly
totalLog=logFilePath+totalLog;
fileNameList=getFileNames();;
System.out.println("FileNameList size = "+fileNameList.size());
for(int i=0;i<fileNameList.size();i++)
newLog=fileNameList.get(i).toString();
writeFile(totalLog,newLog);
//to analyse the logs & to produce reports
//getValuesFromFilesOnly(Choice,logFileName);
}catch (Exception e)
System.out.println(e.getMessage());
}[JSP is used for server validation.
So you need a an application server (like Tomcat or Jboss) to execute your jsp files.
you can create the .war file of your simple jsp application and put it in the server.
then you will have to access your page using a web browser.
the URL will be
http://<ComputerName or IP Address>:<PortNumber>/<WarFileName>/<MainJspPage>
(eg: http://100.100.100.252:8080/SimpleApplication/mainPage.jsp)
-Achyuth -
How can I change (or select) what is being being used when I share, as the file cover. When I Share lets say "Master File" i want to select a frame that is used as the file cover. So when its on my desktop I see this image as the file icon.
I don't think Finder does this (I've tried).
iTunes does though. Where you can set artwork or the "poster frame"...
This may not be what you want but if it helps, I know 2 ways do this is
Open the video in QuicktimePlayer7 | View | Set Poster Frame (even then, you might need to save it as .mov (ie in a 'mov container').
Drag the file into iTunes and set the artwork (as in http://www.dummies.com/how-to/content/adding-album-cover-art-or-images-in-itunes .html)
From there, iTunes will use that frame as the "poster frame" ie the photo/frame that shows when you browse your videos. Which is what you want, but limited to iTunes.
When I do either of these above, the frame I set does not show when exploring files in "Finder" (or in the other Explorer tool I use called "Pathfinder").
So it maybe, that exactly what you want, is not possible. -
Embedded jar files decrease performance
Hi.
When deploying a project using the SAP BAPI eWay we get this warning:
[#|2008-07-24T17:07:59.687+0200|WARNING|IS5.1.3|javax.enterprise.system.tools.deployment|_ThreadID=18; ThreadName=http35000-Processor1;|Component svc_BAPItest_ISH_out.jar contains one or more embedded jars. This will significantly decrease deployment performance. It is recommended to move the embedded jar file(s) to top level of the EAR.|#]
Why? As in other projects we imported some jar-files (e.g. log4j) to the jcd(s). However, for the other projects we never got this warning.
Does the running performence decreases as well? How do we move the files to top level of the EAR?
Best Regards,
Heiner.
(Using JCAPS 5.1.3 ESR Rollup U2, Design: WinXP, Runtime: Solaris)Is there any web appliction server or j2ee server that has their own classloader to dynamically extract and hunt down things within a .ear or .war file without unarchiving it to disk? It appears that everyone I have ever seen creates a temporary file on disk.
A fellow colleague of mine indicated that with today's computer speeds, it is actually faster in most cases to read/decompress on the fly in memory than it is to decompress to disk, then read from disk. The reason being that one of the biggest bottlenecks is IO. Reading an uncompressed file from disk may be slower than reading a compressed file from disk. The IO is slow, but the speed of a largely compressed file to uncompress is faster than reading the entire thing from the HD. This may not always be the case. Considering OS caching of recent file use from the HD, etc. -
Using a jar file in my application... how?
I have a JAR file which contains some classes I need to use in my application. I however, after looking in several books, cannot figure out how to use this JAR file within my application.
Do I simply put it in the directory with my .java files, and use an import command? I'm confused.If the classes in the jar are part of a package then you can import them based on the package structure. The jar file will have to be part of your CLASSPATH variable.
i.e.
myUtils.jar
resides in C:\"My Classes"
CLASSPATH = .;"C:\My Classes";"C:\My Classes\myUtils.jar"
within the jar I have the following class:
\ameyer\Util\someUtil.class
\ameyer\Util\anotherUtil.class
To use these classes I could use the following import statement
import ameyer.Util.*;
This would import any class at that level in the jar.
Note: the import part of the CLASSPATH is "C:\My Classes\myUtils.jar"
hope this helps. -
What is directory where I can put in jar file without specify classpath ?
hi,
Is there any directory in weblogic similar to the directory of WEB-INF/lib/ where I can throw a jar file in without specify classpath explicitly.
The reason I'm looking for such directory is :
-- I do not want to specify classpath explicitly
-- I'd like it outside of an application so that it stay even if the application redeployed.
ThanksHi Aacc,
The domain library directory that you are looking for is usually $DOMAIN_DIR/lib, for example "C:\Oracle\WLS_Middleware10.3.4\user_projects\domains\test_domain_1\lib" (Windows) or "/u01/weblogic/domains/my_domain/lib" (Linux/Unix).
The jars located in this directory will be picked up and added dynamically to the end of the server classpath at server startup. The jars will be ordered lexically in the classpath. The domain library directory is one mechanism that can be used for adding application libraries to the server classpath.
You can override the $DOMAIN_DIR/lib directory using the -Dweblogic.ext.dirs system property during startup. This property specifies a list of directories to pick up jars from and dynamically append to the end of the server classpath using java.io.File.pathSeparator as the delimiter between path entries.
-Cris -
Sample Flash applications that can be embedded on DMD
Does anyone have any sample flash applications that read their configuration data from an external file and that can be embeded in a DMD presentation?
And MOST IMPORTANTLY with the .fla file?
The ciscoet.com portal has plenty of samples but they are all stand alone applications no DMD embedding.
It seems we are all struggling with getting some dynamic content on the Displays things like:
RSS Reader that does more than just the headline
Weather Widget
Image rotator
Dynamic Table grid reading data from Web Service or XML file
I've got flash components working on the DMPs if I play them directly but the idea is to use them in the DMD.
Thanks for any helpWe run a number of flash applications that pull external XML data.
A limitation in flash does not allow you to play flash apps unless you set up a cross-domain policy XML in your web server root that looks something like this:
<?xml version="1.0"?>
http://www.adobe.com/xml/dtds/cross-domain-policy.dtd">
This is allowing all domains access to your flash with the use of the wildcard, but you might want to modify it to be more strict.
Also, if you have a 4310 DMP, you cannot embed flash using HTML. The DMD module that you are using must call the .swf directly. Also, the 4310 supports action script 2 only, not action script 3, so if your flash app is running AS3, it will not work.
If you have the 4400, you can do anything, including embedding flash files in HTML, and you can also use AS3.
For other types of Dyanmic HTML content, a 4310 will have a hard time. For any dynamic content that needs to be displayed on a screen, we run background routines that writes data out to image format. The 4310 is perfectly capable of displaying a jpeg.
Those are the general restrictions we've run into. If you have any specific questions, put them here and I'll let you know if we've run into it before and how we handled it.
Cheers!
-Michael -
Can I place jar files inside ejb-jar.jar?
Hi,
I'm reading about the packaging rules for creating an ejb-jar.jar file, and I'm wondering whether it's possible to include a jar file (containing helper classes) inside of the ejb-jar file. A "lib" dir (for containing such helper jars) doesn't seem to be part of the ejb-jar file format.
The EJB 3 spec has this to say (Ch 20, "Enterprise JavaBeans 3.0, Final Release):
"The ejb-jar file must also contain, either by inclusion or by reference, the class files for all the classes and interfaces that each enterprise bean class and the home interfaces, component interfaces, and/or web service endpoints depend on, except Java EE and J2SE classes. This includes their superclasses and superinterfaces, dependent classes, and the classes and interfaces used as method parameters, results, and exceptions"
Now, it seems that the root of the the ejb-jar file contains all the classes (in the appropriate Java package layout). But what about including JAR files? The ejb-jar spec seems to have nothing to say about a "lib" dir that can contain jars (as a WAR file can).
Summary of questions:
1) Can an ejb-jar file contain a jar file? If so, how/where?
2) Can the ejb-jar file's META-INF/MANIFEST.MF file contain a reference to a JAR file?
I'm not considering correct design at the point... I'd just like to know if these 2 scenarios are possible.
Thank you!
kamuifxYes, I have an ear file..................
I have an EAR file; inside the EAR I have a WAR file (web module) and an EJB-jar file (EJB module).......... the EJB need some classes placed in a jar file (a helper .jar or an util .jar)...........
my question is: How can I use the classes of the .jar files in te EJB??????
thanks -
Gridworld Case Study - how to use a .jar file with textpad
Hello,
I am a student currently working on a project involving the Gridworld case study. While trying to work on my project at home, I discovered that I would get new "cannot find symbol" compiler errors that I had not previously gotten while compiling the same code at school. I am assuming this has something to do with the .jar file included in the gridworld code. How do I get textpad and/or the java compiler to find and use the .jar file and reccognise the classes which i am importing and extending in my project?
Thanks,
-AlexThanks, It works for compiler now.
Now, I write a html to run the applet. appletviewer
says "
java.lang.NoClassDefFoundError: ij/process/ImageProcessor
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:1590)
at java.lang.Class.getConstructor0(Class.java:1762)
at java.lang.Class.newInstance0(Class.java:276)
at java.lang.Class.newInstance(Class.java:259)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:566)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:495)
at sun.applet.AppletPanel.run(AppletPanel.java:292)
at java.lang.Thread.run(Thread.java:536)
It seems the appletviewer can not find the right path for the package. How can I fix this?
Thank again,
Hillxy -
How do we use our .jar file of Re-Usable Business Components in 11g?
Hi All:
We have developed a library of re-usable Business Components in 10g utilizing the instructions found here:
http://download-west.oracle.com/docs/cd/B31017_01/web.1013/b25947/bcadvgen007.htm
We are now planning on migrating to 11g, so we need to know how to implement this re-usable business component library.
Is it possible to use it as it stands created in 10.1.3.3?
Or do we have to migrate it over? And how is this done since we still have applications that use it in 10g?
Your input is very appreciated since this is an important step in our migration plan. Doing this correctly is crucial to our shop. We have been trying a few things, so far with no luck.
Thanks very muich.
Mary
UofWShay:
My colleague that received the errors is going to unexpectedly be off for a few days, so I tried to re-create the errors so that I could get back to you. What was essentially happening was that on certain tables, the first column was missing from the EntityImpl. These tables MIGHT be those that had a primary key that when JDev removed the underscore, had the same name as the Oracle table. For example the table name was ResidenceCode and the primary key of that table was Resident_Code and was found as the first column in the table. HOWEVER, when I tried migrating our reusable business components libarary .jar file, using 11.1.1.2.0, I did not experience the same errors, so I'll get back to you. She was perhaps using an older version of 11g?
But I do have one question. Can we use a .jar file of reusable business components built in 10g in 11g? As you can imagine, this library is being used in other applications, and we'd like to prevent having two copies, if at all possible. Because of all the structural changes, I am guessing we can't, but I'd really appreciate your reply.
I have found the documentation *36.7 Working with Libraries of Reusable Business Components* at http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/bcadvgen.htm#CHEFECGD with respect to 11g. If you know of any other 11g considerations with respect to this task, that would be great as well.
Thanks Shay, I really appreciate hearing from you.
Mary
UofW -
I can`t open jar files though my java version is updated
Hello everybody, I`m using Macbook Pro 13` with Lion on it.
As it says in the title, I can`t open jar files though, my java version is updated.
It says, I shuld check the console.
Right now, my java version is, "1.7.0_15", and i`m trying to open a jar file created 3 days ago, by some developer.
Although, if im trying to open jar file created 1 year ago, it doe`s open.
Why is that? and, How can i fix it?
Thanks.Franeo wrote:
Hello everybody, I`m using Macbook Pro 13` with Lion on it.
As it says in the title, I can`t open jar files though, my java version is updated.
It says, I shuld check the console.
With Java 6 and prior, you had to enable logging first before you could view error messages in Console. I am guessing that you need to check the Java Control Panel to see if logging is turned on. -
Error adding package to class that is using a jar
Hi,
I have a class that is using a jar but I need it to be in a package so I can use it with JSP, but each time I put the package in the class I get some compile errors that the classes in the jar can't be found.
Example:
Compiling 1 source file to C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\build\web\WEB-INF\classes
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:22: cannot find symbol
symbol : class PP_OpenInterface
location: class tecno.Tecnomen
private PP_OpenInterface pp = null;
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:23: cannot find symbol
symbol : class PP_OpenInterface_Factory
location: class tecno.Tecnomen
private PP_OpenInterface_Factory ppf = null;
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:127: cannot find symbol
symbol : class PP_exception
location: class tecno.Tecnomen
public int GenericRecharge (String Subid,int monto) throws PP_exception
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:79: cannot find symbol
symbol : variable PP_OpenInterface_FactoryHelper
location: class tecno.Tecnomen
ppf = PP_OpenInterface_FactoryHelper.narrow(nsRef);
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:91: cannot find symbol
symbol : class PP_exception
location: class tecno.Tecnomen
catch(PP_exception ex)
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:139: cannot find symbol
symbol : class paramRecord
location: class tecno.Tecnomen
paramRecord pSeq [] = new paramRecord[] {
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:139: cannot find symbol
symbol : class paramRecord
location: class tecno.Tecnomen
paramRecord pSeq [] = new paramRecord[] {
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:140: cannot find symbol
symbol : class paramRecord
location: class tecno.Tecnomen
new paramRecord(0,subId),
C:\Documents and Settings\ehasbunv\Mis documentos\proyecto\mex\cc\src\java\tecno\Tecnomen.java:141: cannot find symbol
symbol : class paramRecord
location: class tecno.Tecnomen
new paramRecord(1,amount),Checking another file, the problem is that if I'm
trying to use a class in the default package in
another class and put a package name in the class
then I can't use the default package. Is there any
workaround?Nope. Get in the habit now of making ALL of your classes belong to packages. The "no-package" is only for creating 'toy' applications with no dependencies from other packaged classes. -
Can't open .jar file, nothing happens when I click, MAC OS 10.6.8
Hello,
I can't open .jar file, nothing happens when I click on the .jar file.
I have MAC OS 10.6.8
The thing it, I have desktop application that I'm building on Netbeans and when I compile and deploy it... it runs from Netbeans folder where I have all the files but copying the .jar on the desktop. It says "The Java JAR file "blablabla.jar" could not be launched check the Console for possible error messages"
Any idea or solution will be appreciated.
Thanks in advance
CharlesThese are Java files. http://www.java.com/en/ is where you can get the latest Java for your operating system. If your Java files need an older version of Java, there are instructions on the web to downgrade Mac Java, but it is difficult, and poses security issues.
-
Looking for a free iOS 4 app that can search through .pdf files or spreadsheets
Looking for a free iOS 4 app that can search through .pdf files or spreadsheet
ThanksHey there
"pdf creator" for iPad works flawlessly for me working with pdf files
It takes care of all my needs
I'm not sure about sending via Wifi or Bluetooth but I send them via e- mail all the time
Possibly it could handle your needs as well
Just type it into the App Store search field and the first one that comes up is the one I use
Jump on over there and read up on it before buying and see if it will help you
Hope this helps
Regards -
Dont ask why! How do I call an applet that is in a jar file that is...
Can someone tell me how I would call an applet that is inside of a jar file that is inside of a parent jar file?
example call to an Applet
<APPLET CODE="TimeApplet" ARCHIVE="time.jar" />what I want to do is something like
<APPLET CODE="TimeApplet" ARCHIVE="parent.time.jar" />
where parent is the top jar and time is the inner jar.any help or links to tutorials/articles would be most appreciated.
if you ask why I wont answer.we are doing a signed applet and we only want the user to have to sign 1 time
and we have lots of applets to display so we dont want to have them sign for
each item.Sorry but that doesn't make much sense, niether does putting a jar file in a jar file.
Do you want the "do you trust" question only one time? If so than you only have
to sign all the jar files with the same key.
You can load a jar file from your applet but it seems that these jar files will run
in sanbox security no matter how you sign it:
http://forum.java.sun.com/thread.jspa?messageID=3582952
Asking why does make sense, I coud be asking how to climb a building without
telling my objective is to get on the 10th floor.
You would tell me how to climb the building an I'd probably do it and find out
later I could just as well have taken the elivator.
Maybe you are looking for
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ITunes Says Original File Cannot Be Found...Over and Over!
How do I stop this from happening? I use an external HD, as it's an 88 GB collection and I don't want that on my iMac's primary HD/ Every couple of months, thousands of files are "lost", even though they're safe and sound in the iTunes Remote library
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How can I add a folder of MP3s to Final Cut so they show up in the media browser?
I have a collection of royalty free audio clips in MP3 format. I would like to get them to show up in the media browser, so I don't have to go to the finder each time to get them into a project. Any idea how to do this?
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Facebook will not show profile pics or chat list pics , but ie will , is it a setting
the only pics (icons) it will show are the generic male female icons that facebook provides if you don't load your picture when i check the error console it has lots of errors ,,,,,i don't know a thing about that part, as far as i can tell only faceb
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By mistake I ran Windows Backup/Restore with SAP services on URGENT
Dear all What I did by mistake I ran Windows Backup/Restore with SAP services on (I stopped win sql services and SAP instance). After restore under same circumstances I could not start istance (actually it started but after connect with saplogon disp
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Speakers creative 2.1 sbs 380- can't instal
I cant install this speakers. I've got xp and there is no option 2.1. However I can't find driver. Now I have chosen two stereo speakers but soob. doesn't work:/ Do You know any solution?