Java by API/java.util.jar/JarEntry

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JarEntry: getAttributes()

   <source lang="java">
 

import java.io.IOException; import java.util.Enumeration; import java.util.jar.Attributes; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class Main {

 public static void main(String[] args) throws IOException {
   JarFile jf = new JarFile(args[0]);
   Enumeration e = jf.entries();
   while (e.hasMoreElements()) {
     JarEntry je = (JarEntry) e.nextElement();
     String name = je.getName();
     Attributes a = je.getAttributes();
     if (a != null) {
       Object[] nameValuePairs = a.entrySet().toArray();
       for (int j = 0; j < nameValuePairs.length; j++) {
         System.out.println(nameValuePairs[j]);
       }
     }
   }
 }

}


 </source>
   
  
 
  



JarEntry: getComment()

   <source lang="java">
 

import java.io.IOException; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class Main {

 public static void main(String[] args) throws IOException {
   JarFile jf = new JarFile(args[0]);
   Enumeration e = jf.entries();
   while (e.hasMoreElements()) {
     JarEntry je = (JarEntry) e.nextElement();
     String name = je.getName();
     long crc = je.getCrc();
     System.out.println("Its CRC is " + crc);
     String comment = je.getComment();
     if (comment != null && !comment.equals("")) {
       System.out.println(comment);
     }
     if (je.isDirectory()) {
       System.out.println(name + " is a directory");
     }
   }
 }

}


 </source>
   
  
 
  



JarEntry: getCompressedSize()

   <source lang="java">
 

import java.io.IOException; import java.util.Date; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class Main {

 public static void main(String[] args) throws IOException {
   JarFile jf = new JarFile(args[0]);
   Enumeration e = jf.entries();
   while (e.hasMoreElements()) {
     JarEntry je = (JarEntry) e.nextElement();
     String name = je.getName();
     Date lastModified = new Date(je.getTime());
     long uncompressedSize = je.getSize();
     long compressedSize = je.getCompressedSize();
     System.out.println(lastModified);
     System.out.println(uncompressedSize);
     System.out.println(compressedSize);
   }
 }

}


 </source>
   
  
 
  



JarEntry: getCrc()

   <source lang="java">
 

import java.io.IOException; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class Main {

 public static void main(String[] args) throws IOException {
   JarFile jf = new JarFile(args[0]);
   Enumeration e = jf.entries();
   while (e.hasMoreElements()) {
     JarEntry je = (JarEntry) e.nextElement();
     String name = je.getName();
     long crc = je.getCrc();
     System.out.println("Its CRC is " + crc);
     String comment = je.getComment();
     if (comment != null && !comment.equals("")) {
       System.out.println(comment);
     }
     if (je.isDirectory()) {
       System.out.println(name + " is a directory");
     }
   }
 }

}


 </source>
   
  
 
  



JarEntry: getName()

   <source lang="java">
 

import java.io.IOException; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class Main {

 public static void main(String[] args) throws IOException {
   JarFile jf = new JarFile(args[0]);
   Enumeration e = jf.entries();
   while (e.hasMoreElements()) {
     JarEntry je = (JarEntry) e.nextElement();
     String name = je.getName();
     System.out.println(name);
   }
 }

}


 </source>
   
  
 
  



JarEntry: getSize()

   <source lang="java">
 

import java.io.IOException; import java.util.Date; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class Main {

 public static void main(String[] args) throws IOException {
   JarFile jf = new JarFile(args[0]);
   Enumeration e = jf.entries();
   while (e.hasMoreElements()) {
     JarEntry je = (JarEntry) e.nextElement();
     String name = je.getName();
     Date lastModified = new Date(je.getTime());
     long uncompressedSize = je.getSize();
     long compressedSize = je.getCompressedSize();
     System.out.println(lastModified);
     System.out.println(uncompressedSize);
     System.out.println(compressedSize);
   }
 }

}


 </source>
   
  
 
  



JarEntry: getTime()

   <source lang="java">
 

import java.io.IOException; import java.util.Date; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class Main {

 public static void main(String[] args) throws IOException {
   JarFile jf = new JarFile(args[0]);
   Enumeration e = jf.entries();
   while (e.hasMoreElements()) {
     JarEntry je = (JarEntry) e.nextElement();
     String name = je.getName();
     Date lastModified = new Date(je.getTime());
     long uncompressedSize = je.getSize();
     long compressedSize = je.getCompressedSize();
     System.out.println(lastModified);
     System.out.println(uncompressedSize);
     System.out.println(compressedSize);
   }
 }

}


 </source>
   
  
 
  



JarEntry: isDirectory()

   <source lang="java">
 

import java.io.IOException; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; public class Main {

 public static void main(String[] args) throws IOException {
   JarFile jf = new JarFile(args[0]);
   Enumeration e = jf.entries();
   while (e.hasMoreElements()) {
     JarEntry je = (JarEntry) e.nextElement();
     String name = je.getName();
     long crc = je.getCrc();
     System.out.println("Its CRC is " + crc);
     String comment = je.getComment();
     if (comment != null && !comment.equals("")) {
       System.out.println(comment);
     }
     if (je.isDirectory()) {
       System.out.println(name + " is a directory");
     }
   }
 }

}


 </source>
   
  
 
  



JarEntry: setTime(long time)

   <source lang="java">

import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.jar.JarEntry; import java.util.jar.JarOutputStream; import java.util.jar.Manifest; public class Main {

 public static int BUFFER_SIZE = 10240;
 void createJarArchive(File archiveFile, File[] tobeJared) throws Exception {
   byte buffer[] = new byte[BUFFER_SIZE];
   FileOutputStream stream = new FileOutputStream(archiveFile);
   JarOutputStream out = new JarOutputStream(stream, new Manifest());
   for (int i = 0; i < tobeJared.length; i++) {
     if (tobeJared[i] == null || !tobeJared[i].exists() || tobeJared[i].isDirectory())
       continue; // Just in case...
     JarEntry jarAdd = new JarEntry(tobeJared[i].getName());
     jarAdd.setTime(tobeJared[i].lastModified());
     out.putNextEntry(jarAdd);
     FileInputStream in = new FileInputStream(tobeJared[i]);
     while (true) {
       int nRead = in.read(buffer, 0, buffer.length);
       if (nRead <= 0)
         break;
       out.write(buffer, 0, nRead);
     }
     in.close();
   }
   out.close();
   stream.close();
 }

}

 </source>