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JarEntry

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();   } }