diff -r 394379b81e73 -r 32653a09f0db emul/src/main/java/java/io/DataInputStream.java
--- a/emul/src/main/java/java/io/DataInputStream.java	Sat Nov 10 17:27:07 2012 +0100
+++ b/emul/src/main/java/java/io/DataInputStream.java	Sat Nov 10 19:01:28 2012 +0100
@@ -529,7 +529,7 @@
                 if (--room < 0) {
                     buf = new char[offset + 128];
                     room = buf.length - offset - 1;
-                    System.arraycopy(lineBuffer, 0, buf, 0, offset);
+                    arraycopy(lineBuffer, 0, buf, 0, offset);
                     lineBuffer = buf;
                 }
                 buf[offset++] = (char) c;
@@ -660,4 +660,9 @@
         // The number of chars produced may be less than utflen
         return new String(chararr, 0, chararr_count);
     }
+    static void arraycopy(char[] value, int srcBegin, char[] dst, int dstBegin, int count) {
+        while (count-- > 0) {
+            dst[dstBegin++] = value[srcBegin++];
+        }
+    }
 }