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                 if (ob == null)
  13                         throw new NullPointerException();
  14                 return ob;
  15         }
  16
  17         public static void transfer(InputStream is, OutputStream os)
  18                         throws IOException {
  19                 byte[] buffer = new byte[16384];
  20                 int len = -1;
  21                 while ((len = is.read(buffer)) != -1)
  22                         os.write(buffer, 0, len);
  23         }
  24
  25         public static void nothrowClose(Closeable c) {
  26                 if (c != null) {
  27                         try {
  28                                 c.close();
  29                         } catch (IOException e) {}
  30                 }
  31         }
  32
  33         public static <E> E first(Iterable<E> i)
  34         {
  35                 Iterator<E> it = i.iterator();
  36                 if (it.hasNext())
  37                         return it.next();
  38                 return null;
  39         }
  40 }