Question: I want to know the given class name exists in which jar file?

Ads

 
 
 

Share on Google+Share on Google+

vidhyasudha
I want to know the given class name exists in which jar file?
1 Answer(s)      6 years and 3 months ago
Posted in : Java Beginners

I want to know the given class name exists in which jar file? C:\Program Files\IBM\IBMIMShared\plugins in this path around 600 jar files are there. i want to know the name of the jar file where 'com.rational.ft.util.debug' class exists.

Ads
View Answers

February 17, 2011 at 5:57 PM


Java find the jar of the given class

import java.io.*;
import java.util.*;
import java.util.jar.*;

class OnlyExt implements FilenameFilter{
  String ext;
  public OnlyExt(String ext){
  this.ext="." + ext;
  }
  public boolean accept(File dir,String name){
  return name.endsWith(ext);
  }
}
public class FindJar{

 private static boolean debug = true;

 public static void getClasseNamesInPackage(String packageName){
   ArrayList classes = new ArrayList();

   packageName = packageName.replaceAll("\\." , "/");
   if (debug) 
   try{
       FilenameFilter ff = new OnlyExt("jar");
        File folder = new File("C:/Program Files/Java/jdk1.6.0_20/lib/");
        File[] files = folder.listFiles(ff);
        for(int i=0;i<files.length;i++){
     JarInputStream jarFile = new JarInputStream(new FileInputStream (files[i].getPath()));
     JarEntry jarEntry;

     while(true) {
       jarEntry=jarFile.getNextJarEntry ();
       if(jarEntry == null){
         break;
       }
       if((jarEntry.getName ().startsWith (packageName)) &&
            (jarEntry.getName ().endsWith (".class")) ) {
         if (debug) System.out.println  ("Found " + jarEntry.getName().replaceAll("/", "\\.")+" in "+files[i].getName());
         classes.add (jarEntry.getName().replaceAll("/", "\\."));
       }
     }
        }
   }
   catch( Exception e){
     e.printStackTrace ();
   }
}
  public static void main (String[] args){
   FindJar.getClasseNamesInPackage("org.jfree.chart.ChartFactory");
   }
}

Ads









Related Tutorials/Questions & Answers:
Advertisements
Tutorials   
Java Spring Hibernate Struts Training What is the meaning of Java Platform? Why Java is a platform independent language? What is the benefits of learning Core Java? Which technology should I learn after Java? What is array in java with example? How to Convert ArrayList to Array? How to substring in Java? How to format number in Java? What is instance variable in Java? How to download MySQL JDBC driver? What is Calendar class in Java? Which is the best Java tutorials for beginners? How to rename a file in Java? How to delete file in Java code? How to get day from date in Java using Calendar? How to get day of week in Java? How to calculate Date Difference in Java? How to compare date in Java? How to declare array in Java? How to calculate average of array in Java? What is Array in Java? write a java program to find the summation of all the integers entered on command line Sum of two numbers using command line arguments in Java How to create and use Array in Java? How to pass command line arguments in Java? How to create Applet Hello World? Appending String efficiently in Java How to append String in Java? How to list even numbers between 1 and 100? How to add BigDecimal in Java? What is Abstraction In Java? Which is best Beginners Java Tutorial? What is java.util package? Create list from array in Java Filter collection in Java 8 What is the best way to filter a Java Collection? Easy way to transform Collection to Array? How to convert Collection to Array in Java? What are Basic Java Language Elements? Advanced Java Tutorials in 2017 Java brief history Best Reasons to learn Java Java Example Codes and Tutorials in 2017 How do I read a large file quickly in Java? Is learning Java worthwhile? How to create first Java Program? Retrieve database from the table dynamically in jsp from oracle using servlet What does core Java include? java What are some way to learn Java quickly?

Ads

 
Advertisement null

Ads