Java by API/java.util.zip/CheckedOutputStream

new CheckedOutputStream(OutputStream out, Checksum cksum)

   <source lang="java">

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.FileReader; import java.io.IOException; import java.util.zip.Adler32; import java.util.zip.CheckedInputStream; import java.util.zip.CheckedOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; import java.util.zip.ZipOutputStream; public class Main {

 public static void main(String[] args) throws IOException {
   FileOutputStream f = new FileOutputStream("test.zip");
   CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());
   ZipOutputStream zos = new ZipOutputStream(csum);
   BufferedOutputStream out = new BufferedOutputStream(zos);
   zos.setComment("A test of Java Zipping");
   for (int i = 0; i < args.length; i++) {
     System.out.println("Writing file " + args[i]);
     BufferedReader in = new BufferedReader(new FileReader(args[i]));
     zos.putNextEntry(new ZipEntry(args[i]));
     int c;
     while ((c = in.read()) != -1)
       out.write(c);
     in.close();
   }
   out.close();

   System.out.println("Checksum: " + csum.getChecksum().getValue());
   System.out.println("Reading file");
   FileInputStream fi = new FileInputStream("test.zip");
   CheckedInputStream csumi = new CheckedInputStream(fi, new Adler32());
   ZipInputStream in2 = new ZipInputStream(csumi);
   BufferedInputStream bis = new BufferedInputStream(in2);
   ZipEntry ze;
   while ((ze = in2.getNextEntry()) != null) {
     System.out.println("Reading file " + ze);
     int x;
     while ((x = bis.read()) != -1)
       System.out.write(x);
   }
   System.out.println("Checksum: " + csumi.getChecksum().getValue());
   bis.close();

 }

}

 </source>