src/de/j32/util/Util.java

   1 package de.j32.util;
   2
   3 import java.io.Closeable;
   4 import java.io.IOException;
   5 import java.io.InputStream;
   6 import java.io.OutputStream;
   7 import java.util.Iterator;
   8
   9 public class Util {
  10
  11         public static <E> E nonnull(E ob)
  12         {
  13                 if (ob == null)
  14                         throw new NullPointerException();
  15                 return ob;
  16         }
  17
  18         public static void transfer(InputStream is, OutputStream os)
  19                         throws IOException
  20         {
  21                 byte[] buffer = new byte[16384];
  22                 int len = -1;
  23                 while ((len = is.read(buffer)) != -1)
  24                         os.write(buffer, 0, len);
  25         }
  26
  27         public static void nothrowClose(Closeable c)
  28         {
  29                 if (c != null) {
  30                         try {
  31                                 c.close();
  32                         }
  33                         catch (IOException e) {}
  34                 }
  35         }
  36
  37         public static <E> E first(Iterable<E> i)
  38         {
  39                 Iterator<E> it = i.iterator();
  40                 if (it.hasNext())
  41                         return it.next();
  42                 return null;
  43         }
  44 }